From b30998000302a7e768d85bc1fab2bb4c8f8c5278 Mon Sep 17 00:00:00 2001 From: Ryan Malloy Date: Fri, 27 Feb 2026 23:52:06 -0700 Subject: [PATCH] Add v0.18.0: Saturn ring tilt, penumbral eclipse, rise/set windows, angular rate MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Four features, 10 new SQL functions (174 → 184 objects), 29 test suites: Saturn ring tilt: saturn_ring_tilt() exposes sub-observer latitude B'. planet_magnitude() for Saturn now includes Mallama & Hilton Eq. 10 ring correction (-2.60|sin B'| + 1.25 sin²B'), removing the ~1.5 mag globe-only caveat. IAU 2000 pole direction, ecliptic J2000 projection. Conical shadow model: Replaces cylindrical shadow with umbra/penumbra cones using Sun's finite angular size. Four new functions: satellite_in_penumbra(), satellite_shadow_state(), satellite_next_penumbra_entry/exit(). Existing eclipse functions are backward compatible via narrower (more accurate) umbra boundary. Rise/set event windows: Three SRFs returning TABLE(event_time, event_type) for all rise/set events within a time window — planet_rise_set_events(), sun_rise_set_events(), moon_rise_set_events(). Follows predict_passes() SRF pattern. Optional refracted parameter, 366-day window limit. Angular separation rate: Vincenty formula extracted to reusable helper. eq_angular_rate() for generic finite-difference rate, planet_angular_rate() for solar system body convenience (1-minute dt, handles Sun/planets/Moon). --- CLAUDE.md | 37 +- Makefile | 6 +- pg_orrery.control | 2 +- sql/pg_orrery--0.17.0--0.18.0.sql | 92 ++ sql/pg_orrery--0.18.0.sql | 1905 +++++++++++++++++++++++++++++ src/eclipse_funcs.c | 293 ++++- src/equatorial_funcs.c | 234 +++- src/magnitude_funcs.c | 103 +- src/rise_set_funcs.c | 203 +++ src/types.h | 1 + test/expected/v018_features.out | 312 +++++ test/sql/v018_features.sql | 259 ++++ 12 files changed, 3364 insertions(+), 83 deletions(-) create mode 100644 sql/pg_orrery--0.17.0--0.18.0.sql create mode 100644 sql/pg_orrery--0.18.0.sql create mode 100644 test/expected/v018_features.out create mode 100644 test/sql/v018_features.sql diff --git a/CLAUDE.md b/CLAUDE.md index 08c7fbc..9a7aef5 100644 --- a/CLAUDE.md +++ b/CLAUDE.md @@ -1,9 +1,9 @@ # pg_orrery — A Database Orrery for PostgreSQL ## What This Is -A database orrery — celestial mechanics types and functions for PostgreSQL. Native C extension using PGXS, 174 SQL objects (158 user-visible functions + 16 GiST support), 9 custom types, covering satellites (SGP4/SDP4), planets (VSOP87 + optional JPL DE441), Moon (ELP2000-82B), 19 planetary moons (L1.2/TASS17/GUST86/MarsSat), stars (with proper motion and annual parallax), comets, asteroids (MPC catalog), Jupiter radio bursts, interplanetary Lambert transfers, equatorial RA/Dec coordinates with GiST-indexed angular separation, atmospheric refraction, annual stellar aberration, light-time correction, rise/set prediction (geometric + refracted) with status diagnostics, IAU constellation identification with full name lookup (Roman 1987), twilight dawn/dusk (civil/nautical/astronomical), lunar phase (angle, illumination, name, age), planet apparent magnitude (Mallama & Hilton 2018), solar elongation, planet phase fraction, satellite eclipse prediction (cylindrical shadow), observing night quality assessment, and lunar optical libration (Meeus Ch. 53). +A database orrery — celestial mechanics types and functions for PostgreSQL. Native C extension using PGXS, 184 SQL objects (168 user-visible functions + 16 GiST support), 9 custom types, covering satellites (SGP4/SDP4), planets (VSOP87 + optional JPL DE441), Moon (ELP2000-82B), 19 planetary moons (L1.2/TASS17/GUST86/MarsSat), stars (with proper motion and annual parallax), comets, asteroids (MPC catalog), Jupiter radio bursts, interplanetary Lambert transfers, equatorial RA/Dec coordinates with GiST-indexed angular separation, atmospheric refraction, annual stellar aberration, light-time correction, rise/set prediction (geometric + refracted + event windows) with status diagnostics, IAU constellation identification with full name lookup (Roman 1987), twilight dawn/dusk (civil/nautical/astronomical), lunar phase (angle, illumination, name, age), planet apparent magnitude with Saturn ring correction (Mallama & Hilton 2018), solar elongation, planet phase fraction, satellite eclipse prediction (conical shadow with penumbra), observing night quality assessment, lunar optical libration (Meeus Ch. 53), and angular separation rate. -**Current version:** 0.17.0 +**Current version:** 0.18.0 **Repository:** https://git.supported.systems/warehack.ing/pg_orrery **Documentation:** https://pg-orrery.warehack.ing @@ -11,7 +11,7 @@ A database orrery — celestial mechanics types and functions for PostgreSQL. Na ```bash make PG_CONFIG=/usr/bin/pg_config # Compile with PGXS sudo make install PG_CONFIG=/usr/bin/pg_config # Install extension -make installcheck PG_CONFIG=/usr/bin/pg_config # Run 28 regression test suites +make installcheck PG_CONFIG=/usr/bin/pg_config # Run 29 regression test suites ``` Requires: PostgreSQL 17 development headers, GCC, Make. @@ -27,7 +27,7 @@ Image: `git.supported.systems/warehack.ing/pg_orrery:pg17` ## Project Layout ``` -pg_orrery.control # Extension metadata (version 0.17.0) +pg_orrery.control # Extension metadata (version 0.18.0) Makefile # PGXS build + Docker targets sql/ pg_orrery--0.1.0.sql # v0.1.0: satellite types/functions/operators @@ -47,6 +47,7 @@ sql/ pg_orrery--0.15.0.sql # v0.15.0: constellation full name, rise/set status (151 objects) pg_orrery--0.16.0.sql # v0.16.0: twilight, lunar phase, planet magnitude (162 objects) pg_orrery--0.17.0.sql # v0.17.0: elongation, phase, eclipse, night quality, libration (174 objects) + pg_orrery--0.18.0.sql # v0.18.0: ring tilt, penumbral eclipse, rise/set windows, angular rate (184 objects) pg_orrery--0.1.0--0.2.0.sql # Migration: v0.1.0 → v0.2.0 (adds solar system) pg_orrery--0.2.0--0.3.0.sql # Migration: v0.2.0 → v0.3.0 (adds DE ephemeris) pg_orrery--0.3.0--0.4.0.sql # Migration: v0.3.0 → v0.4.0 @@ -63,6 +64,7 @@ sql/ pg_orrery--0.14.0--0.15.0.sql # Migration: v0.14.0 → v0.15.0 (constellation full name, rise/set status) pg_orrery--0.15.0--0.16.0.sql # Migration: v0.15.0 → v0.16.0 (twilight, lunar phase, planet magnitude) pg_orrery--0.16.0--0.17.0.sql # Migration: v0.16.0 → v0.17.0 (elongation, phase, eclipse, night quality, libration) + pg_orrery--0.17.0--0.18.0.sql # Migration: v0.17.0 → v0.18.0 (ring tilt, penumbral eclipse, rise/set windows, angular rate) src/ pg_orrery.c # PG_MODULE_MAGIC + _PG_init() (GUC registration) types.h # All struct definitions + constants + DE body ID mapping @@ -87,14 +89,14 @@ src/ kepler_funcs.c # kepler_propagate(), comet_observe() kepler.h # Shared Kepler solver interface (kepler_position()) orbital_elements_type.c # orbital_elements type, MPC parser, small_body_observe/equatorial/apparent() - equatorial_funcs.c # equatorial type I/O, accessors, satellite/planet/sun/moon RA/Dec + equatorial_funcs.c # equatorial type I/O, accessors, satellite/planet/sun/moon RA/Dec, angular rate refraction_funcs.c # atmospheric_refraction(), _ext(), topo_elevation_apparent() - rise_set_funcs.c # planet/sun/moon rise/set (geometric + refracted) + twilight dawn/dusk + rise_set_funcs.c # planet/sun/moon rise/set (geometric + refracted) + twilight dawn/dusk + event window SRFs constellation_data.h / .c # Roman (1987) IAU boundary table (CDS VI/42, 357 segments) constellation_funcs.c # constellation() from equatorial or RA/Dec lunar_phase_funcs.c # moon_phase_angle(), moon_illumination(), moon_phase_name(), moon_age() - magnitude_funcs.c # planet_magnitude(), solar_elongation(), planet_phase() - eclipse_funcs.c # satellite eclipse prediction (cylindrical shadow, Vallado §5.3) + magnitude_funcs.c # planet_magnitude() (with Saturn ring correction), solar_elongation(), planet_phase(), saturn_ring_tilt() + eclipse_funcs.c # satellite eclipse prediction (conical shadow with penumbra, Vallado §5.3) libration.h / libration_funcs.c # lunar optical libration (Meeus Ch. 53) l12.c / l12.h # L1.2 Galilean moon theory (Lieske 1998) tass17.c / tass17.h # TASS 1.7 Saturn moon theory (Vienne & Duriez 1995) @@ -120,7 +122,7 @@ src/ PROVENANCE.md # Vendoring decision, modifications, verification LICENSE # MIT license (Bill Gray / Project Pluto) test/ - sql/ # 27 regression test suites + sql/ # 29 regression test suites expected/ # Expected output data/vallado_518.json # 518 Vallado test vectors (AIAA 2006-6753-Rev1) docs/ @@ -147,7 +149,7 @@ All types are fixed-size, `STORAGE = plain`, `ALIGNMENT = double`. No TOAST over | `orbital_elements` | 72 | Classical Keplerian elements for comets/asteroids (epoch, q, e, inc, omega, Omega, tp, H, G) | | `equatorial` | 24 | Apparent RA (hours), Dec (degrees), distance (km) — of date | -## Function Domains (174 SQL objects) +## Function Domains (184 SQL objects) | Domain | Theory | Key Functions | Count | |--------|--------|---------------|-------| @@ -158,19 +160,19 @@ All types are fixed-size, `STORAGE = plain`, `ALIGNMENT = double`. No TOAST over | Stars | J2000 + IAU 1976 precession | `star_observe()`, `star_equatorial()`, `star_observe_pm()` | 5 | | Comets/asteroids | Two-body Keplerian + MPC | `small_body_observe()`, `small_body_equatorial()`, `oe_from_mpc()` | 19 | | Refraction | Bennett (1982) | `atmospheric_refraction()`, `predict_passes_refracted()` | 4 | -| Equatorial spatial | Vincenty formula | `eq_angular_distance()`, `eq_within_cone()`, `<->` | 2 | +| Equatorial spatial | Vincenty formula | `eq_angular_distance()`, `eq_within_cone()`, `eq_angular_rate()`, `<->` | 4 | | Jupiter radio | Carr et al. (1983) | `jupiter_burst_probability()` | 3 | | Transfers | Lambert (Izzo 2015) | `lambert_transfer()`, `lambert_c3()` | 2 | | DE ephemeris | JPL DE440/441 (optional) | `planet_observe_de()`, `*_equatorial_de()`, `*_apparent_de()` | 23 | | GiST index (TLE) | Altitude-band approximation | `&&` (overlap), `<->` (distance) | 8 | | GiST index (equatorial) | Spherical bounding box | `<->` (KNN ordering) | 8 | -| Rise/set | Bisection (60s scan) | `planet_next_rise()`, `sun_next_rise_refracted()`, `*_rise_set_status()` | 15 | +| Rise/set | Bisection (60s scan) | `planet_next_rise()`, `sun_next_rise_refracted()`, `*_rise_set_status()`, `*_rise_set_events()` | 18 | | Twilight | Sun depression angles | `sun_civil_dawn()`, `sun_nautical_dusk()`, `sun_astronomical_dawn()` | 6 | | Lunar phase | VSOP87 + ELP2000-82B geometry | `moon_phase_angle()`, `moon_illumination()`, `moon_phase_name()`, `moon_age()` | 4 | -| Planet magnitude | Mallama & Hilton (2018) | `planet_magnitude()` | 1 | +| Planet magnitude | Mallama & Hilton (2018) | `planet_magnitude()`, `saturn_ring_tilt()` | 2 | | Solar elongation | VSOP87 geometry | `solar_elongation()` | 1 | | Planet phase | VSOP87 geometry | `planet_phase()` | 1 | -| Satellite eclipse | Cylindrical shadow (Vallado §5.3) | `satellite_is_eclipsed()`, `satellite_next_eclipse_entry()` | 4 | +| Satellite eclipse | Conical shadow (Vallado §5.3) | `satellite_is_eclipsed()`, `satellite_next_eclipse_entry()`, `satellite_shadow_state()`, `satellite_in_penumbra()` | 8 | | Observing quality | Composite (twilight+Moon) | `observing_night_quality()` | 1 | | Lunar libration | Meeus (1998) Ch. 53 | `moon_libration_longitude()`, `moon_libration()`, `moon_subsolar_longitude()` | 5 | | Constellation | Roman (1987) CDS VI/42 | `constellation()`, `constellation_full_name()` | 3 | @@ -307,7 +309,7 @@ All numerical logic is byte-identical to upstream. Verified against 518 Vallado ## Testing -28 regression test suites via `make installcheck`: +29 regression test suites via `make installcheck`: | Suite | What it tests | |-------|--------------| @@ -339,10 +341,11 @@ All numerical logic is byte-identical to upstream. Verified against 518 Vallado | v015_features | constellation_full_name lookup, rise_set_status diagnostics (circumpolar/never_rises) | | v016_features | Twilight ordering/offset/polar, lunar phase at known events, planet magnitude ranges/errors | | v017_features | Solar elongation ranges/errors, planet phase ranges, satellite eclipse, observing night quality, lunar libration ranges, subsolar longitude | +| v018_features | Saturn ring tilt range/variation, penumbral eclipse (shadow state, penumbra precedes umbra), rise/set event windows (Sun/Moon/planet, refracted vs geometric), angular separation rate (generic + planet convenience) | ### PG Version Matrix -Test all 28 regression suites + DE reader unit test across PostgreSQL 14-18 using Docker: +Test all 29 regression suites + DE reader unit test across PostgreSQL 14-18 using Docker: ```bash make test-matrix # Full matrix (PG 14-18) @@ -368,7 +371,7 @@ Logs saved to `test/matrix-logs/pg${ver}.log`. The script reuses the Dockerfile Starlight docs at `docs/` — 44+ MDX pages covering all domains. -Sections: Getting Started, Guides (9 domain walkthroughs incl. DE ephemeris), Workflow Translation (Skyfield/Horizons/GMAT/Radio Jupiter Pro comparisons), Reference (all 174 SQL objects incl. DE variants, equatorial GiST, refraction, rise/set, constellation, twilight, lunar phase, planet magnitude, solar elongation, planet phase, satellite eclipse, observing quality, lunar libration), Architecture (Hamilton's principles, constant custody, observation pipeline), Performance (benchmarks). +Sections: Getting Started, Guides (9 domain walkthroughs incl. DE ephemeris), Workflow Translation (Skyfield/Horizons/GMAT/Radio Jupiter Pro comparisons), Reference (all 184 SQL objects incl. DE variants, equatorial GiST, refraction, rise/set, constellation, twilight, lunar phase, planet magnitude, Saturn ring tilt, solar elongation, planet phase, satellite eclipse with penumbra, observing quality, lunar libration, angular separation rate), Architecture (Hamilton's principles, constant custody, observation pipeline), Performance (benchmarks). ### Local Development ```bash diff --git a/Makefile b/Makefile index ccfd5c3..c78d4e5 100644 --- a/Makefile +++ b/Makefile @@ -15,7 +15,8 @@ DATA = sql/pg_orrery--0.1.0.sql sql/pg_orrery--0.2.0.sql sql/pg_orrery--0.1.0--0 sql/pg_orrery--0.14.0.sql sql/pg_orrery--0.13.0--0.14.0.sql \ sql/pg_orrery--0.15.0.sql sql/pg_orrery--0.14.0--0.15.0.sql \ sql/pg_orrery--0.16.0.sql sql/pg_orrery--0.15.0--0.16.0.sql \ - sql/pg_orrery--0.17.0.sql sql/pg_orrery--0.16.0--0.17.0.sql + sql/pg_orrery--0.17.0.sql sql/pg_orrery--0.16.0--0.17.0.sql \ + sql/pg_orrery--0.18.0.sql sql/pg_orrery--0.17.0--0.18.0.sql # Our extension C sources OBJS = src/pg_orrery.o src/tle_type.o src/eci_type.o src/observer_type.o \ @@ -58,7 +59,8 @@ REGRESS = tle_parse sgp4_propagate coord_transforms pass_prediction gist_index c constellation \ v015_features \ v016_features \ - v017_features + v017_features \ + v018_features REGRESS_OPTS = --inputdir=test # Pure C — no C++ runtime needed. LAPACK for OD solver (dgelss_). diff --git a/pg_orrery.control b/pg_orrery.control index f573a6d..ee1bcac 100644 --- a/pg_orrery.control +++ b/pg_orrery.control @@ -1,4 +1,4 @@ comment = 'A database orrery — celestial mechanics types and functions for PostgreSQL' -default_version = '0.17.0' +default_version = '0.18.0' module_pathname = '$libdir/pg_orrery' relocatable = true diff --git a/sql/pg_orrery--0.17.0--0.18.0.sql b/sql/pg_orrery--0.17.0--0.18.0.sql new file mode 100644 index 0000000..5378885 --- /dev/null +++ b/sql/pg_orrery--0.17.0--0.18.0.sql @@ -0,0 +1,92 @@ +-- pg_orrery 0.17.0 -> 0.18.0: Saturn ring tilt, penumbral eclipse, +-- rise/set event windows, angular separation rate + +-- ============================================================ +-- Saturn ring tilt (1) +-- ============================================================ + +CREATE FUNCTION saturn_ring_tilt(timestamptz) RETURNS float8 + AS 'MODULE_PATHNAME', 'saturn_ring_tilt' + LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE; +COMMENT ON FUNCTION saturn_ring_tilt(timestamptz) IS + 'Sub-observer latitude B'' of Earth relative to Saturn ring plane (degrees, [-27, +27]). Uses IAU 2000 pole direction.'; + +-- ============================================================ +-- Penumbral eclipse prediction (4) +-- ============================================================ + +CREATE FUNCTION satellite_in_penumbra(tle, timestamptz) RETURNS bool + AS 'MODULE_PATHNAME', 'satellite_in_penumbra' + LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE; +COMMENT ON FUNCTION satellite_in_penumbra(tle, timestamptz) IS + 'True if the satellite is in Earth penumbral shadow (partial sunlight) at the given time.'; + +CREATE FUNCTION satellite_shadow_state(tle, timestamptz) RETURNS text + AS 'MODULE_PATHNAME', 'satellite_shadow_state' + LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE; +COMMENT ON FUNCTION satellite_shadow_state(tle, timestamptz) IS + 'Shadow state of satellite: ''sunlit'', ''penumbra'', or ''umbra''. Uses conical shadow model.'; + +CREATE FUNCTION satellite_next_penumbra_entry(tle, timestamptz) RETURNS timestamptz + AS 'MODULE_PATHNAME', 'satellite_next_penumbra_entry' + LANGUAGE C STABLE STRICT PARALLEL SAFE; +COMMENT ON FUNCTION satellite_next_penumbra_entry(tle, timestamptz) IS + 'Next time the satellite enters Earth penumbral shadow (up to 7-day search). NULL if none found.'; + +CREATE FUNCTION satellite_next_penumbra_exit(tle, timestamptz) RETURNS timestamptz + AS 'MODULE_PATHNAME', 'satellite_next_penumbra_exit' + LANGUAGE C STABLE STRICT PARALLEL SAFE; +COMMENT ON FUNCTION satellite_next_penumbra_exit(tle, timestamptz) IS + 'Next time the satellite exits Earth penumbral shadow (up to 7-day search). NULL if none found.'; + +-- ============================================================ +-- Rise/set event windows (3 SRFs) +-- ============================================================ + +CREATE FUNCTION planet_rise_set_events( + body_id int4, observer, start timestamptz, stop timestamptz, + refracted bool DEFAULT false +) RETURNS TABLE(event_time timestamptz, event_type text) + AS 'MODULE_PATHNAME', 'planet_rise_set_events' + LANGUAGE C STABLE STRICT PARALLEL SAFE + ROWS 10; +COMMENT ON FUNCTION planet_rise_set_events(int4, observer, timestamptz, timestamptz, bool) IS + 'All rise and set events for a planet within a time window. Returns TABLE(event_time, event_type). Max 366-day window.'; + +CREATE FUNCTION sun_rise_set_events( + observer, start timestamptz, stop timestamptz, + refracted bool DEFAULT false +) RETURNS TABLE(event_time timestamptz, event_type text) + AS 'MODULE_PATHNAME', 'sun_rise_set_events' + LANGUAGE C STABLE STRICT PARALLEL SAFE + ROWS 10; +COMMENT ON FUNCTION sun_rise_set_events(observer, timestamptz, timestamptz, bool) IS + 'All rise and set events for the Sun within a time window. Returns TABLE(event_time, event_type). Max 366-day window.'; + +CREATE FUNCTION moon_rise_set_events( + observer, start timestamptz, stop timestamptz, + refracted bool DEFAULT false +) RETURNS TABLE(event_time timestamptz, event_type text) + AS 'MODULE_PATHNAME', 'moon_rise_set_events' + LANGUAGE C STABLE STRICT PARALLEL SAFE + ROWS 10; +COMMENT ON FUNCTION moon_rise_set_events(observer, timestamptz, timestamptz, bool) IS + 'All rise and set events for the Moon within a time window. Returns TABLE(event_time, event_type). Max 366-day window.'; + +-- ============================================================ +-- Angular separation rate (2) +-- ============================================================ + +CREATE FUNCTION eq_angular_rate( + equatorial, equatorial, equatorial, equatorial, float8 +) RETURNS float8 + AS 'MODULE_PATHNAME', 'eq_angular_rate' + LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE; +COMMENT ON FUNCTION eq_angular_rate(equatorial, equatorial, equatorial, equatorial, float8) IS + 'Rate of change of angular separation (deg/hr). Args: pos1_t0, pos2_t0, pos1_t1, pos2_t1, dt_seconds. Positive = separating, negative = approaching.'; + +CREATE FUNCTION planet_angular_rate(int4, int4, timestamptz) RETURNS float8 + AS 'MODULE_PATHNAME', 'planet_angular_rate' + LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE; +COMMENT ON FUNCTION planet_angular_rate(int4, int4, timestamptz) IS + 'Rate of angular separation change between two bodies (deg/hr). Body IDs: 0=Sun, 1-8=planets, 10=Moon. Uses 1-minute finite difference.'; diff --git a/sql/pg_orrery--0.18.0.sql b/sql/pg_orrery--0.18.0.sql new file mode 100644 index 0000000..a61f145 --- /dev/null +++ b/sql/pg_orrery--0.18.0.sql @@ -0,0 +1,1905 @@ +-- pg_orrery -- Orbital mechanics types and functions for PostgreSQL +-- +-- Types: tle, eci_position, geodetic, topocentric, observer, pass_event +-- Provides SGP4/SDP4 propagation, coordinate transforms, pass prediction, +-- and GiST indexing on altitude bands for conjunction screening. +-- +-- All propagation uses WGS-72 constants (matching TLE mean element fitting). +-- Coordinate output uses WGS-84 (matching modern geodetic standards). + +-- ============================================================ +-- Shell types (forward declarations) +-- ============================================================ + +CREATE TYPE tle; +CREATE TYPE eci_position; +CREATE TYPE geodetic; +CREATE TYPE topocentric; +CREATE TYPE observer; +CREATE TYPE pass_event; + + +-- ============================================================ +-- TLE type: Two-Line Element set +-- ============================================================ + +CREATE FUNCTION tle_in(cstring) RETURNS tle + AS 'MODULE_PATHNAME' LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE; + +CREATE FUNCTION tle_out(tle) RETURNS cstring + AS 'MODULE_PATHNAME' LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE; + +CREATE FUNCTION tle_recv(internal) RETURNS tle + AS 'MODULE_PATHNAME' LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE; + +CREATE FUNCTION tle_send(tle) RETURNS bytea + AS 'MODULE_PATHNAME' LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE; + +CREATE TYPE tle ( + INPUT = tle_in, + OUTPUT = tle_out, + RECEIVE = tle_recv, + SEND = tle_send, + INTERNALLENGTH = 112, + ALIGNMENT = double, + STORAGE = plain +); + +COMMENT ON TYPE tle IS 'Two-Line Element set — parsed mean orbital elements for SGP4/SDP4 propagation'; + +-- TLE accessor functions + +CREATE FUNCTION tle_epoch(tle) RETURNS float8 + AS 'MODULE_PATHNAME' LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE; +COMMENT ON FUNCTION tle_epoch(tle) IS 'TLE epoch as Julian date (UTC)'; + +CREATE FUNCTION tle_norad_id(tle) RETURNS int4 + AS 'MODULE_PATHNAME' LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE; +COMMENT ON FUNCTION tle_norad_id(tle) IS 'NORAD catalog number'; + +CREATE FUNCTION tle_inclination(tle) RETURNS float8 + AS 'MODULE_PATHNAME' LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE; +COMMENT ON FUNCTION tle_inclination(tle) IS 'Orbital inclination in degrees'; + +CREATE FUNCTION tle_eccentricity(tle) RETURNS float8 + AS 'MODULE_PATHNAME' LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE; +COMMENT ON FUNCTION tle_eccentricity(tle) IS 'Orbital eccentricity (dimensionless)'; + +CREATE FUNCTION tle_raan(tle) RETURNS float8 + AS 'MODULE_PATHNAME' LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE; +COMMENT ON FUNCTION tle_raan(tle) IS 'Right ascension of ascending node in degrees'; + +CREATE FUNCTION tle_arg_perigee(tle) RETURNS float8 + AS 'MODULE_PATHNAME' LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE; +COMMENT ON FUNCTION tle_arg_perigee(tle) IS 'Argument of perigee in degrees'; + +CREATE FUNCTION tle_mean_anomaly(tle) RETURNS float8 + AS 'MODULE_PATHNAME' LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE; +COMMENT ON FUNCTION tle_mean_anomaly(tle) IS 'Mean anomaly in degrees'; + +CREATE FUNCTION tle_mean_motion(tle) RETURNS float8 + AS 'MODULE_PATHNAME' LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE; +COMMENT ON FUNCTION tle_mean_motion(tle) IS 'Mean motion in revolutions per day'; + +CREATE FUNCTION tle_bstar(tle) RETURNS float8 + AS 'MODULE_PATHNAME' LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE; +COMMENT ON FUNCTION tle_bstar(tle) IS 'B* drag coefficient (1/earth-radii)'; + +CREATE FUNCTION tle_period(tle) RETURNS float8 + AS 'MODULE_PATHNAME' LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE; +COMMENT ON FUNCTION tle_period(tle) IS 'Orbital period in minutes'; + +CREATE FUNCTION tle_age(tle, timestamptz) RETURNS float8 + AS 'MODULE_PATHNAME' LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE; +COMMENT ON FUNCTION tle_age(tle, timestamptz) IS 'TLE age in days (positive = past epoch, negative = before epoch)'; + +CREATE FUNCTION tle_perigee(tle) RETURNS float8 + AS 'MODULE_PATHNAME' LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE; +COMMENT ON FUNCTION tle_perigee(tle) IS 'Perigee altitude in km above WGS-72 ellipsoid'; + +CREATE FUNCTION tle_apogee(tle) RETURNS float8 + AS 'MODULE_PATHNAME' LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE; +COMMENT ON FUNCTION tle_apogee(tle) IS 'Apogee altitude in km above WGS-72 ellipsoid'; + +CREATE FUNCTION tle_intl_desig(tle) RETURNS text + AS 'MODULE_PATHNAME' LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE; +COMMENT ON FUNCTION tle_intl_desig(tle) IS 'International designator (COSPAR ID)'; + +CREATE FUNCTION tle_from_lines(text, text) RETURNS tle + AS 'MODULE_PATHNAME' LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE; +COMMENT ON FUNCTION tle_from_lines(text, text) IS + 'Construct TLE from separate line1/line2 text columns'; + + +-- ============================================================ +-- ECI position type: True Equator Mean Equinox (TEME) frame +-- ============================================================ + +CREATE FUNCTION eci_in(cstring) RETURNS eci_position + AS 'MODULE_PATHNAME' LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE; + +CREATE FUNCTION eci_out(eci_position) RETURNS cstring + AS 'MODULE_PATHNAME' LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE; + +CREATE FUNCTION eci_recv(internal) RETURNS eci_position + AS 'MODULE_PATHNAME' LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE; + +CREATE FUNCTION eci_send(eci_position) RETURNS bytea + AS 'MODULE_PATHNAME' LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE; + +CREATE TYPE eci_position ( + INPUT = eci_in, + OUTPUT = eci_out, + RECEIVE = eci_recv, + SEND = eci_send, + INTERNALLENGTH = 48, + ALIGNMENT = double, + STORAGE = plain +); + +COMMENT ON TYPE eci_position IS 'Earth-Centered Inertial position and velocity in TEME frame (km, km/s)'; + +-- ECI accessor functions + +CREATE FUNCTION eci_x(eci_position) RETURNS float8 + AS 'MODULE_PATHNAME' LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE; + +CREATE FUNCTION eci_y(eci_position) RETURNS float8 + AS 'MODULE_PATHNAME' LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE; + +CREATE FUNCTION eci_z(eci_position) RETURNS float8 + AS 'MODULE_PATHNAME' LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE; + +CREATE FUNCTION eci_vx(eci_position) RETURNS float8 + AS 'MODULE_PATHNAME' LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE; + +CREATE FUNCTION eci_vy(eci_position) RETURNS float8 + AS 'MODULE_PATHNAME' LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE; + +CREATE FUNCTION eci_vz(eci_position) RETURNS float8 + AS 'MODULE_PATHNAME' LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE; + +CREATE FUNCTION eci_speed(eci_position) RETURNS float8 + AS 'MODULE_PATHNAME' LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE; +COMMENT ON FUNCTION eci_speed(eci_position) IS 'Velocity magnitude in km/s'; + +CREATE FUNCTION eci_altitude(eci_position) RETURNS float8 + AS 'MODULE_PATHNAME' LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE; +COMMENT ON FUNCTION eci_altitude(eci_position) IS 'Approximate geocentric altitude in km (radius - WGS72_AE)'; + + +-- ============================================================ +-- Geodetic type: WGS-84 latitude/longitude/altitude +-- ============================================================ + +CREATE FUNCTION geodetic_in(cstring) RETURNS geodetic + AS 'MODULE_PATHNAME' LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE; + +CREATE FUNCTION geodetic_out(geodetic) RETURNS cstring + AS 'MODULE_PATHNAME' LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE; + +CREATE FUNCTION geodetic_recv(internal) RETURNS geodetic + AS 'MODULE_PATHNAME' LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE; + +CREATE FUNCTION geodetic_send(geodetic) RETURNS bytea + AS 'MODULE_PATHNAME' LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE; + +CREATE TYPE geodetic ( + INPUT = geodetic_in, + OUTPUT = geodetic_out, + RECEIVE = geodetic_recv, + SEND = geodetic_send, + INTERNALLENGTH = 24, + ALIGNMENT = double, + STORAGE = plain +); + +COMMENT ON TYPE geodetic IS 'Geodetic coordinates on WGS-84 ellipsoid (lat/lon in degrees, altitude in km)'; + +CREATE FUNCTION geodetic_lat(geodetic) RETURNS float8 + AS 'MODULE_PATHNAME' LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE; + +CREATE FUNCTION geodetic_lon(geodetic) RETURNS float8 + AS 'MODULE_PATHNAME' LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE; + +CREATE FUNCTION geodetic_alt(geodetic) RETURNS float8 + AS 'MODULE_PATHNAME' LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE; + + +-- ============================================================ +-- Topocentric type: observer-relative az/el/range +-- ============================================================ + +CREATE FUNCTION topocentric_in(cstring) RETURNS topocentric + AS 'MODULE_PATHNAME' LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE; + +CREATE FUNCTION topocentric_out(topocentric) RETURNS cstring + AS 'MODULE_PATHNAME' LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE; + +CREATE FUNCTION topocentric_recv(internal) RETURNS topocentric + AS 'MODULE_PATHNAME' LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE; + +CREATE FUNCTION topocentric_send(topocentric) RETURNS bytea + AS 'MODULE_PATHNAME' LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE; + +CREATE TYPE topocentric ( + INPUT = topocentric_in, + OUTPUT = topocentric_out, + RECEIVE = topocentric_recv, + SEND = topocentric_send, + INTERNALLENGTH = 32, + ALIGNMENT = double, + STORAGE = plain +); + +COMMENT ON TYPE topocentric IS 'Topocentric coordinates relative to observer (azimuth, elevation, range, range rate)'; + +CREATE FUNCTION topo_azimuth(topocentric) RETURNS float8 + AS 'MODULE_PATHNAME' LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE; +COMMENT ON FUNCTION topo_azimuth(topocentric) IS 'Azimuth in degrees (0=N, 90=E, 180=S, 270=W)'; + +CREATE FUNCTION topo_elevation(topocentric) RETURNS float8 + AS 'MODULE_PATHNAME' LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE; +COMMENT ON FUNCTION topo_elevation(topocentric) IS 'Elevation in degrees (0=horizon, 90=zenith)'; + +CREATE FUNCTION topo_range(topocentric) RETURNS float8 + AS 'MODULE_PATHNAME' LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE; +COMMENT ON FUNCTION topo_range(topocentric) IS 'Slant range in km'; + +CREATE FUNCTION topo_range_rate(topocentric) RETURNS float8 + AS 'MODULE_PATHNAME' LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE; +COMMENT ON FUNCTION topo_range_rate(topocentric) IS 'Range rate in km/s (positive = receding)'; + + +-- ============================================================ +-- Observer type: ground station location +-- ============================================================ + +CREATE FUNCTION observer_in(cstring) RETURNS observer + AS 'MODULE_PATHNAME' LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE; + +CREATE FUNCTION observer_out(observer) RETURNS cstring + AS 'MODULE_PATHNAME' LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE; + +CREATE FUNCTION observer_recv(internal) RETURNS observer + AS 'MODULE_PATHNAME' LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE; + +CREATE FUNCTION observer_send(observer) RETURNS bytea + AS 'MODULE_PATHNAME' LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE; + +CREATE TYPE observer ( + INPUT = observer_in, + OUTPUT = observer_out, + RECEIVE = observer_recv, + SEND = observer_send, + INTERNALLENGTH = 24, + ALIGNMENT = double, + STORAGE = plain +); + +COMMENT ON TYPE observer IS 'Ground observer location (accepts: 40.0N 105.3W 1655m or decimal degrees)'; + +CREATE FUNCTION observer_lat(observer) RETURNS float8 + AS 'MODULE_PATHNAME' LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE; +COMMENT ON FUNCTION observer_lat(observer) IS 'Latitude in degrees (positive = North)'; + +CREATE FUNCTION observer_lon(observer) RETURNS float8 + AS 'MODULE_PATHNAME' LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE; +COMMENT ON FUNCTION observer_lon(observer) IS 'Longitude in degrees (positive = East)'; + +CREATE FUNCTION observer_alt(observer) RETURNS float8 + AS 'MODULE_PATHNAME' LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE; +COMMENT ON FUNCTION observer_alt(observer) IS 'Altitude in meters above WGS-84 ellipsoid'; + +CREATE FUNCTION observer_from_geodetic(float8, float8, float8 DEFAULT 0.0) RETURNS observer + AS 'MODULE_PATHNAME' LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE; +COMMENT ON FUNCTION observer_from_geodetic(float8, float8, float8) IS + 'Construct observer from lat (deg), lon (deg), altitude (meters). Avoids text formatting round-trips.'; + + +-- ============================================================ +-- Pass event type: satellite visibility window +-- ============================================================ + +CREATE FUNCTION pass_event_in(cstring) RETURNS pass_event + AS 'MODULE_PATHNAME' LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE; + +CREATE FUNCTION pass_event_out(pass_event) RETURNS cstring + AS 'MODULE_PATHNAME' LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE; + +CREATE FUNCTION pass_event_recv(internal) RETURNS pass_event + AS 'MODULE_PATHNAME' LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE; + +CREATE FUNCTION pass_event_send(pass_event) RETURNS bytea + AS 'MODULE_PATHNAME' LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE; + +CREATE TYPE pass_event ( + INPUT = pass_event_in, + OUTPUT = pass_event_out, + RECEIVE = pass_event_recv, + SEND = pass_event_send, + INTERNALLENGTH = 48, + ALIGNMENT = double, + STORAGE = plain +); + +COMMENT ON TYPE pass_event IS 'Satellite pass event (AOS/MAX/LOS times, max elevation, AOS/LOS azimuths)'; + +CREATE FUNCTION pass_aos_time(pass_event) RETURNS timestamptz + AS 'MODULE_PATHNAME' LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE; +COMMENT ON FUNCTION pass_aos_time(pass_event) IS 'Acquisition of signal time'; + +CREATE FUNCTION pass_max_el_time(pass_event) RETURNS timestamptz + AS 'MODULE_PATHNAME' LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE; +COMMENT ON FUNCTION pass_max_el_time(pass_event) IS 'Maximum elevation time'; + +CREATE FUNCTION pass_los_time(pass_event) RETURNS timestamptz + AS 'MODULE_PATHNAME' LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE; +COMMENT ON FUNCTION pass_los_time(pass_event) IS 'Loss of signal time'; + +CREATE FUNCTION pass_max_elevation(pass_event) RETURNS float8 + AS 'MODULE_PATHNAME' LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE; +COMMENT ON FUNCTION pass_max_elevation(pass_event) IS 'Maximum elevation in degrees'; + +CREATE FUNCTION pass_aos_azimuth(pass_event) RETURNS float8 + AS 'MODULE_PATHNAME' LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE; +COMMENT ON FUNCTION pass_aos_azimuth(pass_event) IS 'AOS azimuth in degrees (0=N)'; + +CREATE FUNCTION pass_los_azimuth(pass_event) RETURNS float8 + AS 'MODULE_PATHNAME' LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE; +COMMENT ON FUNCTION pass_los_azimuth(pass_event) IS 'LOS azimuth in degrees (0=N)'; + +CREATE FUNCTION pass_duration(pass_event) RETURNS interval + AS 'MODULE_PATHNAME' LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE; +COMMENT ON FUNCTION pass_duration(pass_event) IS 'Pass duration (LOS - AOS)'; + + +-- ============================================================ +-- SGP4/SDP4 propagation functions +-- ============================================================ + +CREATE FUNCTION sgp4_propagate(tle, timestamptz) RETURNS eci_position + AS 'MODULE_PATHNAME' LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE; +COMMENT ON FUNCTION sgp4_propagate(tle, timestamptz) IS + 'Propagate TLE to a point in time using SGP4 (near-earth) or SDP4 (deep-space). Returns TEME ECI position/velocity.'; + +CREATE FUNCTION sgp4_propagate_safe(tle, timestamptz) RETURNS eci_position + AS 'MODULE_PATHNAME' LANGUAGE C IMMUTABLE PARALLEL SAFE; +COMMENT ON FUNCTION sgp4_propagate_safe(tle, timestamptz) IS + 'Like sgp4_propagate but returns NULL on error instead of raising an exception. For batch queries with potentially invalid TLEs.'; + +CREATE FUNCTION sgp4_propagate_series(tle, timestamptz, timestamptz, interval) + RETURNS TABLE(t timestamptz, x float8, y float8, z float8, vx float8, vy float8, vz float8) + AS 'MODULE_PATHNAME' LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE + ROWS 100; +COMMENT ON FUNCTION sgp4_propagate_series(tle, timestamptz, timestamptz, interval) IS + 'Propagate TLE over a time range at regular intervals. Returns time series of TEME positions.'; + +CREATE FUNCTION tle_distance(tle, tle, timestamptz) RETURNS float8 + AS 'MODULE_PATHNAME' LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE; +COMMENT ON FUNCTION tle_distance(tle, tle, timestamptz) IS + 'Euclidean distance in km between two TLEs at a reference time'; + + +-- ============================================================ +-- Coordinate transform functions +-- ============================================================ + +CREATE FUNCTION eci_to_geodetic(eci_position, timestamptz) RETURNS geodetic + AS 'MODULE_PATHNAME' LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE; +COMMENT ON FUNCTION eci_to_geodetic(eci_position, timestamptz) IS + 'Convert TEME ECI position to WGS-84 geodetic coordinates at given time'; + +CREATE FUNCTION eci_to_topocentric(eci_position, observer, timestamptz) RETURNS topocentric + AS 'MODULE_PATHNAME' LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE; +COMMENT ON FUNCTION eci_to_topocentric(eci_position, observer, timestamptz) IS + 'Convert TEME ECI position to topocentric (az/el/range) relative to observer'; + +CREATE FUNCTION subsatellite_point(tle, timestamptz) RETURNS geodetic + AS 'MODULE_PATHNAME' LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE; +COMMENT ON FUNCTION subsatellite_point(tle, timestamptz) IS + 'Subsatellite (nadir) point on WGS-84 ellipsoid at given time'; + +CREATE FUNCTION ground_track(tle, timestamptz, timestamptz, interval) + RETURNS TABLE(t timestamptz, lat float8, lon float8, alt float8) + AS 'MODULE_PATHNAME' LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE + ROWS 100; +COMMENT ON FUNCTION ground_track(tle, timestamptz, timestamptz, interval) IS + 'Ground track as time series of subsatellite points (lat/lon in degrees, alt in km)'; + +CREATE FUNCTION observe(tle, observer, timestamptz) RETURNS topocentric + AS 'MODULE_PATHNAME' LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE; +COMMENT ON FUNCTION observe(tle, observer, timestamptz) IS + 'Propagate TLE and compute observer-relative look angles in one call. Returns topocentric (az/el/range/range_rate).'; + +CREATE FUNCTION observe_safe(tle, observer, timestamptz) RETURNS topocentric + AS 'MODULE_PATHNAME' LANGUAGE C IMMUTABLE PARALLEL SAFE; +COMMENT ON FUNCTION observe_safe(tle, observer, timestamptz) IS + 'Like observe() but returns NULL on propagation error. For batch queries with potentially invalid/decayed TLEs.'; + + +-- ============================================================ +-- Pass prediction functions +-- ============================================================ + +CREATE FUNCTION next_pass(tle, observer, timestamptz) RETURNS pass_event + AS 'MODULE_PATHNAME' LANGUAGE C STABLE STRICT PARALLEL SAFE; +COMMENT ON FUNCTION next_pass(tle, observer, timestamptz) IS + 'Find the next satellite pass over observer (searches up to 7 days ahead)'; + +CREATE FUNCTION predict_passes(tle, observer, timestamptz, timestamptz, float8 DEFAULT 0.0) + RETURNS SETOF pass_event + AS 'MODULE_PATHNAME' LANGUAGE C STABLE STRICT PARALLEL SAFE + ROWS 10; +COMMENT ON FUNCTION predict_passes(tle, observer, timestamptz, timestamptz, float8) IS + 'Predict all satellite passes over observer in time window. Optional min_elevation in degrees.'; + +CREATE FUNCTION pass_visible(tle, observer, timestamptz, timestamptz) RETURNS boolean + AS 'MODULE_PATHNAME' LANGUAGE C STABLE STRICT PARALLEL SAFE; +COMMENT ON FUNCTION pass_visible(tle, observer, timestamptz, timestamptz) IS + 'True if any pass occurs over observer in the time window'; + + +-- ============================================================ +-- GiST operator support functions +-- ============================================================ + +-- Overlap operator: do orbital keys overlap in altitude AND inclination? +CREATE FUNCTION tle_overlap(tle, tle) RETURNS boolean + AS 'MODULE_PATHNAME' LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE; + +-- Altitude distance operator (altitude-only, for KNN ordering) +CREATE FUNCTION tle_alt_distance(tle, tle) RETURNS float8 + AS 'MODULE_PATHNAME' LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE; + +CREATE OPERATOR && ( + LEFTARG = tle, + RIGHTARG = tle, + FUNCTION = tle_overlap, + COMMUTATOR = &&, + RESTRICT = areasel, + JOIN = areajoinsel +); + +COMMENT ON OPERATOR && (tle, tle) IS 'Orbital key overlap (altitude band AND inclination range) — necessary condition for conjunction'; + +CREATE OPERATOR <-> ( + LEFTARG = tle, + RIGHTARG = tle, + FUNCTION = tle_alt_distance, + COMMUTATOR = <-> +); + +COMMENT ON OPERATOR <-> (tle, tle) IS '2-D orbital distance in km: L2 norm of altitude-band gap and inclination gap (radians × Earth radius). Returns 0 when both dimensions overlap.'; + + +-- ============================================================ +-- GiST operator class for 2-D orbital indexing (altitude + inclination) +-- ============================================================ + +-- GiST internal support functions +CREATE FUNCTION gist_tle_compress(internal) RETURNS internal + AS 'MODULE_PATHNAME' LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE; + +CREATE FUNCTION gist_tle_decompress(internal) RETURNS internal + AS 'MODULE_PATHNAME' LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE; + +CREATE FUNCTION gist_tle_consistent(internal, tle, smallint, oid, internal) RETURNS boolean + AS 'MODULE_PATHNAME' LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE; + +CREATE FUNCTION gist_tle_union(internal, internal) RETURNS internal + AS 'MODULE_PATHNAME' LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE; + +CREATE FUNCTION gist_tle_penalty(internal, internal, internal) RETURNS internal + AS 'MODULE_PATHNAME' LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE; + +CREATE FUNCTION gist_tle_picksplit(internal, internal) RETURNS internal + AS 'MODULE_PATHNAME' LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE; + +CREATE FUNCTION gist_tle_same(internal, internal, internal) RETURNS internal + AS 'MODULE_PATHNAME' LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE; + +CREATE FUNCTION gist_tle_distance(internal, tle, smallint, oid, internal) RETURNS float8 + AS 'MODULE_PATHNAME' LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE; + +CREATE OPERATOR CLASS tle_ops + DEFAULT FOR TYPE tle USING gist AS + OPERATOR 3 && , + OPERATOR 15 <-> (tle, tle) FOR ORDER BY float_ops, + FUNCTION 1 gist_tle_consistent(internal, tle, smallint, oid, internal), + FUNCTION 2 gist_tle_union(internal, internal), + FUNCTION 3 gist_tle_compress(internal), + FUNCTION 4 gist_tle_decompress(internal), + FUNCTION 5 gist_tle_penalty(internal, internal, internal), + FUNCTION 6 gist_tle_picksplit(internal, internal), + FUNCTION 7 gist_tle_same(internal, internal, internal), + FUNCTION 8 gist_tle_distance(internal, tle, smallint, oid, internal); + + +-- ============================================================ +-- Heliocentric type: ecliptic J2000 position in AU +-- ============================================================ + +CREATE TYPE heliocentric; + +CREATE FUNCTION heliocentric_in(cstring) RETURNS heliocentric + AS 'MODULE_PATHNAME' LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE; + +CREATE FUNCTION heliocentric_out(heliocentric) RETURNS cstring + AS 'MODULE_PATHNAME' LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE; + +CREATE FUNCTION heliocentric_recv(internal) RETURNS heliocentric + AS 'MODULE_PATHNAME' LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE; + +CREATE FUNCTION heliocentric_send(heliocentric) RETURNS bytea + AS 'MODULE_PATHNAME' LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE; + +CREATE TYPE heliocentric ( + INPUT = heliocentric_in, + OUTPUT = heliocentric_out, + RECEIVE = heliocentric_recv, + SEND = heliocentric_send, + INTERNALLENGTH = 24, + ALIGNMENT = double, + STORAGE = plain +); + +COMMENT ON TYPE heliocentric IS 'Heliocentric position in ecliptic J2000 frame (x, y, z in AU)'; + +CREATE FUNCTION helio_x(heliocentric) RETURNS float8 + AS 'MODULE_PATHNAME' LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE; +COMMENT ON FUNCTION helio_x(heliocentric) IS 'X component in AU (ecliptic J2000, vernal equinox direction)'; + +CREATE FUNCTION helio_y(heliocentric) RETURNS float8 + AS 'MODULE_PATHNAME' LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE; +COMMENT ON FUNCTION helio_y(heliocentric) IS 'Y component in AU (ecliptic J2000)'; + +CREATE FUNCTION helio_z(heliocentric) RETURNS float8 + AS 'MODULE_PATHNAME' LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE; +COMMENT ON FUNCTION helio_z(heliocentric) IS 'Z component in AU (ecliptic J2000, north ecliptic pole)'; + +CREATE FUNCTION helio_distance(heliocentric) RETURNS float8 + AS 'MODULE_PATHNAME' LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE; +COMMENT ON FUNCTION helio_distance(heliocentric) IS 'Heliocentric distance in AU'; + + +-- ============================================================ +-- Star observation functions +-- ============================================================ + +CREATE FUNCTION star_observe(float8, float8, observer, timestamptz) RETURNS topocentric + AS 'MODULE_PATHNAME' LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE; +COMMENT ON FUNCTION star_observe(float8, float8, observer, timestamptz) IS + 'Observe a star from (ra_hours J2000, dec_degrees J2000, observer, time). Returns topocentric az/el. Range is 0 (infinite distance).'; + +CREATE FUNCTION star_observe_safe(float8, float8, observer, timestamptz) RETURNS topocentric + AS 'MODULE_PATHNAME' LANGUAGE C IMMUTABLE PARALLEL SAFE; +COMMENT ON FUNCTION star_observe_safe(float8, float8, observer, timestamptz) IS + 'Like star_observe but returns NULL on invalid inputs. For batch queries over star catalogs.'; + + +-- ============================================================ +-- Keplerian propagation functions +-- ============================================================ + +CREATE FUNCTION kepler_propagate( + q_au float8, eccentricity float8, + inclination_deg float8, arg_perihelion_deg float8, + long_asc_node_deg float8, perihelion_jd float8, + t timestamptz +) RETURNS heliocentric + AS 'MODULE_PATHNAME' LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE; +COMMENT ON FUNCTION kepler_propagate(float8, float8, float8, float8, float8, float8, timestamptz) IS + 'Two-body Keplerian propagation from classical orbital elements. Returns heliocentric ecliptic J2000 position in AU. Handles elliptic, parabolic, and hyperbolic orbits.'; + + +-- ============================================================ +-- Comet observation +-- ============================================================ + +CREATE FUNCTION comet_observe( + q_au float8, eccentricity float8, + inclination_deg float8, arg_perihelion_deg float8, + long_asc_node_deg float8, perihelion_jd float8, + earth_x_au float8, earth_y_au float8, earth_z_au float8, + obs observer, t timestamptz +) RETURNS topocentric + AS 'MODULE_PATHNAME' LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE; +COMMENT ON FUNCTION comet_observe(float8, float8, float8, float8, float8, float8, float8, float8, float8, observer, timestamptz) IS + 'Observe a comet/asteroid from orbital elements. Requires Earth heliocentric ecliptic J2000 position (AU). Returns topocentric az/el with geocentric range in km.'; + + +-- ============================================================ +-- VSOP87 planets, ELP82B Moon, Sun observation +-- ============================================================ + +CREATE FUNCTION planet_heliocentric(int4, timestamptz) RETURNS heliocentric + AS 'MODULE_PATHNAME' LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE; +COMMENT ON FUNCTION planet_heliocentric(int4, timestamptz) IS + 'VSOP87 heliocentric ecliptic J2000 position (AU). Body IDs: 0=Sun, 1=Mercury, ..., 8=Neptune.'; + +CREATE FUNCTION planet_observe(int4, observer, timestamptz) RETURNS topocentric + AS 'MODULE_PATHNAME' LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE; +COMMENT ON FUNCTION planet_observe(int4, observer, timestamptz) IS + 'Observe a planet from (body_id 1-8, observer, time). Returns topocentric az/el with geocentric range in km.'; + +CREATE FUNCTION sun_observe(observer, timestamptz) RETURNS topocentric + AS 'MODULE_PATHNAME' LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE; +COMMENT ON FUNCTION sun_observe(observer, timestamptz) IS + 'Observe the Sun from (observer, time). Returns topocentric az/el with geocentric range in km.'; + +CREATE FUNCTION moon_observe(observer, timestamptz) RETURNS topocentric + AS 'MODULE_PATHNAME' LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE; +COMMENT ON FUNCTION moon_observe(observer, timestamptz) IS + 'Observe the Moon via ELP2000-82B from (observer, time). Returns topocentric az/el with geocentric range in km.'; + + +-- ============================================================ +-- Planetary moon observation +-- ============================================================ + +CREATE FUNCTION galilean_observe(int4, observer, timestamptz) RETURNS topocentric + AS 'MODULE_PATHNAME' LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE; +COMMENT ON FUNCTION galilean_observe(int4, observer, timestamptz) IS + 'Observe a Galilean moon of Jupiter via L1.2 theory. Body IDs: 0=Io, 1=Europa, 2=Ganymede, 3=Callisto.'; + +CREATE FUNCTION saturn_moon_observe(int4, observer, timestamptz) RETURNS topocentric + AS 'MODULE_PATHNAME' LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE; +COMMENT ON FUNCTION saturn_moon_observe(int4, observer, timestamptz) IS + 'Observe a Saturn moon via TASS 1.7. Body IDs: 0=Mimas, 1=Enceladus, 2=Tethys, 3=Dione, 4=Rhea, 5=Titan, 6=Iapetus, 7=Hyperion.'; + +CREATE FUNCTION uranus_moon_observe(int4, observer, timestamptz) RETURNS topocentric + AS 'MODULE_PATHNAME' LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE; +COMMENT ON FUNCTION uranus_moon_observe(int4, observer, timestamptz) IS + 'Observe a Uranus moon via GUST86. Body IDs: 0=Miranda, 1=Ariel, 2=Umbriel, 3=Titania, 4=Oberon.'; + +CREATE FUNCTION mars_moon_observe(int4, observer, timestamptz) RETURNS topocentric + AS 'MODULE_PATHNAME' LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE; +COMMENT ON FUNCTION mars_moon_observe(int4, observer, timestamptz) IS + 'Observe a Mars moon via MarsSat. Body IDs: 0=Phobos, 1=Deimos.'; + + +-- ============================================================ +-- Jupiter decametric radio burst prediction +-- ============================================================ + +CREATE FUNCTION io_phase_angle(timestamptz) RETURNS float8 + AS 'MODULE_PATHNAME' LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE; +COMMENT ON FUNCTION io_phase_angle(timestamptz) IS + 'Io orbital phase angle in degrees [0,360). 0=superior conjunction (behind Jupiter). Standard Radio JOVE convention.'; + +CREATE FUNCTION jupiter_cml(observer, timestamptz) RETURNS float8 + AS 'MODULE_PATHNAME' LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE; +COMMENT ON FUNCTION jupiter_cml(observer, timestamptz) IS + 'Jupiter Central Meridian Longitude, System III (1965.0), in degrees [0,360). Light-time corrected.'; + +CREATE FUNCTION jupiter_burst_probability(float8, float8) RETURNS float8 + AS 'MODULE_PATHNAME' LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE; +COMMENT ON FUNCTION jupiter_burst_probability(float8, float8) IS + 'Estimated Jupiter decametric burst probability (0-1) from (io_phase_deg, cml_deg). Based on Carr et al. (1983) source regions A, B, C, D.'; + + +-- ============================================================ +-- Interplanetary transfer orbits (Lambert solver) +-- ============================================================ + +CREATE FUNCTION lambert_transfer( + dep_body_id int4, arr_body_id int4, + dep_time timestamptz, arr_time timestamptz, + OUT c3_departure float8, OUT c3_arrival float8, + OUT v_inf_departure float8, OUT v_inf_arrival float8, + OUT tof_days float8, OUT transfer_sma float8 +) RETURNS RECORD + AS 'MODULE_PATHNAME' LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE; +COMMENT ON FUNCTION lambert_transfer(int4, int4, timestamptz, timestamptz) IS + 'Solve Lambert transfer between two planets. Returns C3 (km^2/s^2), v_infinity (km/s), TOF (days), SMA (AU). Body IDs 1-8.'; + +CREATE FUNCTION lambert_c3(int4, int4, timestamptz, timestamptz) RETURNS float8 + AS 'MODULE_PATHNAME' LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE; +COMMENT ON FUNCTION lambert_c3(int4, int4, timestamptz, timestamptz) IS + 'Departure C3 (km^2/s^2) for a Lambert transfer. Returns NULL if solver fails. For pork chop plots.'; + + +-- ============================================================ +-- DE ephemeris functions (optional high-precision) +-- ============================================================ + +CREATE FUNCTION planet_heliocentric_de(int4, timestamptz) RETURNS heliocentric + AS 'MODULE_PATHNAME' LANGUAGE C STABLE STRICT PARALLEL SAFE; +COMMENT ON FUNCTION planet_heliocentric_de(int4, timestamptz) IS + 'Heliocentric ecliptic J2000 position via JPL DE (sub-arcsecond). Falls back to VSOP87 if DE unavailable. Body IDs: 0=Sun, 1-8=Mercury-Neptune.'; + +CREATE FUNCTION planet_observe_de(int4, observer, timestamptz) RETURNS topocentric + AS 'MODULE_PATHNAME' LANGUAGE C STABLE STRICT PARALLEL SAFE; +COMMENT ON FUNCTION planet_observe_de(int4, observer, timestamptz) IS + 'Observe planet via JPL DE. Falls back to VSOP87. Body IDs: 1-8 (Mercury-Neptune).'; + +CREATE FUNCTION sun_observe_de(observer, timestamptz) RETURNS topocentric + AS 'MODULE_PATHNAME' LANGUAGE C STABLE STRICT PARALLEL SAFE; +COMMENT ON FUNCTION sun_observe_de(observer, timestamptz) IS + 'Observe Sun via JPL DE. Falls back to VSOP87.'; + +CREATE FUNCTION moon_observe_de(observer, timestamptz) RETURNS topocentric + AS 'MODULE_PATHNAME' LANGUAGE C STABLE STRICT PARALLEL SAFE; +COMMENT ON FUNCTION moon_observe_de(observer, timestamptz) IS + 'Observe Moon via JPL DE. Falls back to ELP2000-82B.'; + +CREATE FUNCTION lambert_transfer_de( + dep_body_id int4, arr_body_id int4, + dep_time timestamptz, arr_time timestamptz, + OUT c3_departure float8, OUT c3_arrival float8, + OUT v_inf_departure float8, OUT v_inf_arrival float8, + OUT tof_days float8, OUT transfer_sma float8 +) RETURNS RECORD + AS 'MODULE_PATHNAME' LANGUAGE C STABLE STRICT PARALLEL SAFE; +COMMENT ON FUNCTION lambert_transfer_de(int4, int4, timestamptz, timestamptz) IS + 'Lambert transfer via JPL DE positions. Falls back to VSOP87. Body IDs 1-8.'; + +CREATE FUNCTION lambert_c3_de(int4, int4, timestamptz, timestamptz) RETURNS float8 + AS 'MODULE_PATHNAME' LANGUAGE C STABLE STRICT PARALLEL SAFE; +COMMENT ON FUNCTION lambert_c3_de(int4, int4, timestamptz, timestamptz) IS + 'Departure C3 via JPL DE. Falls back to VSOP87. For pork chop plots.'; + +CREATE FUNCTION galilean_observe_de(int4, observer, timestamptz) RETURNS topocentric + AS 'MODULE_PATHNAME' LANGUAGE C STABLE STRICT PARALLEL SAFE; +COMMENT ON FUNCTION galilean_observe_de(int4, observer, timestamptz) IS + 'Observe Galilean moon with JPL DE parent position. L1.2 moon offsets. Body IDs: 0-3 (Io-Callisto).'; + +CREATE FUNCTION saturn_moon_observe_de(int4, observer, timestamptz) RETURNS topocentric + AS 'MODULE_PATHNAME' LANGUAGE C STABLE STRICT PARALLEL SAFE; +COMMENT ON FUNCTION saturn_moon_observe_de(int4, observer, timestamptz) IS + 'Observe Saturn moon with JPL DE parent position. TASS 1.7 moon offsets. Body IDs: 0-7 (Mimas-Hyperion).'; + +CREATE FUNCTION uranus_moon_observe_de(int4, observer, timestamptz) RETURNS topocentric + AS 'MODULE_PATHNAME' LANGUAGE C STABLE STRICT PARALLEL SAFE; +COMMENT ON FUNCTION uranus_moon_observe_de(int4, observer, timestamptz) IS + 'Observe Uranus moon with JPL DE parent position. GUST86 moon offsets. Body IDs: 0-4 (Miranda-Oberon).'; + +CREATE FUNCTION mars_moon_observe_de(int4, observer, timestamptz) RETURNS topocentric + AS 'MODULE_PATHNAME' LANGUAGE C STABLE STRICT PARALLEL SAFE; +COMMENT ON FUNCTION mars_moon_observe_de(int4, observer, timestamptz) IS + 'Observe Mars moon with JPL DE parent position. MarsSat moon offsets. Body IDs: 0-1 (Phobos-Deimos).'; + + +-- Diagnostic function + +CREATE FUNCTION pg_orrery_ephemeris_info( + OUT provider text, OUT file_path text, + OUT start_jd float8, OUT end_jd float8, + OUT version int4, OUT au_km float8 +) RETURNS RECORD + AS 'MODULE_PATHNAME' LANGUAGE C STABLE PARALLEL SAFE; +COMMENT ON FUNCTION pg_orrery_ephemeris_info() IS + 'Returns current ephemeris provider status: VSOP87 or JPL_DE with file path, JD range, version, and AU value.'; + + +-- ============================================================ +-- Orbit determination (TLE fitting from observations) +-- ============================================================ + +-- Fit TLE from ECI position/velocity ephemeris +-- weights: per-observation weighting (NULL = uniform) + +CREATE FUNCTION tle_from_eci( + positions eci_position[], times timestamptz[], + seed tle DEFAULT NULL, fit_bstar boolean DEFAULT false, + max_iter int4 DEFAULT 15, + weights float8[] DEFAULT NULL, + OUT fitted_tle tle, OUT iterations int4, + OUT rms_final float8, OUT rms_initial float8, OUT status text, + OUT condition_number float8, OUT covariance float8[], OUT nstate int4 +) RETURNS RECORD + AS 'MODULE_PATHNAME' LANGUAGE C STABLE PARALLEL SAFE; +COMMENT ON FUNCTION tle_from_eci(eci_position[], timestamptz[], tle, boolean, int4, float8[]) IS + 'Fit a TLE from ECI position/velocity observations via differential correction. Optional per-observation weights for heterogeneous sensor fusion. Returns fitted TLE, RMS residuals, convergence status, condition number, and formal covariance matrix.'; + +-- Fit TLE from topocentric observations (az/el/range) — single observer +-- fit_range_rate: include range_rate as 4th residual component +-- weights: per-observation weighting (NULL = uniform) + +CREATE FUNCTION tle_from_topocentric( + observations topocentric[], times timestamptz[], + obs observer, + seed tle DEFAULT NULL, fit_bstar boolean DEFAULT false, + max_iter int4 DEFAULT 15, + fit_range_rate boolean DEFAULT false, + weights float8[] DEFAULT NULL, + OUT fitted_tle tle, OUT iterations int4, + OUT rms_final float8, OUT rms_initial float8, OUT status text, + OUT condition_number float8, OUT covariance float8[], OUT nstate int4 +) RETURNS RECORD + AS 'MODULE_PATHNAME' LANGUAGE C STABLE PARALLEL SAFE; +COMMENT ON FUNCTION tle_from_topocentric(topocentric[], timestamptz[], observer, tle, boolean, int4, boolean, float8[]) IS + 'Fit a TLE from topocentric (az/el/range) observations via differential correction. Optional range_rate fitting and per-observation weights. Returns fitted TLE, RMS residuals, convergence status, condition number, and formal covariance matrix.'; + +-- Fit TLE from topocentric observations — multiple observers + +CREATE FUNCTION tle_from_topocentric( + observations topocentric[], times timestamptz[], + observers observer[], observer_ids int4[], + seed tle DEFAULT NULL, fit_bstar boolean DEFAULT false, + max_iter int4 DEFAULT 15, + fit_range_rate boolean DEFAULT false, + weights float8[] DEFAULT NULL, + OUT fitted_tle tle, OUT iterations int4, + OUT rms_final float8, OUT rms_initial float8, OUT status text, + OUT condition_number float8, OUT covariance float8[], OUT nstate int4 +) RETURNS RECORD + AS 'MODULE_PATHNAME', 'tle_from_topocentric_multi' + LANGUAGE C STABLE PARALLEL SAFE; +COMMENT ON FUNCTION tle_from_topocentric(topocentric[], timestamptz[], observer[], int4[], tle, boolean, int4, boolean, float8[]) IS + 'Fit a TLE from topocentric observations collected by multiple ground stations. observer_ids[i] indexes into observers[]. Optional range_rate fitting and per-observation weights.'; + +-- Per-observation residuals diagnostic + +CREATE FUNCTION tle_fit_residuals( + fitted tle, + positions eci_position[], + times timestamptz[] +) RETURNS TABLE ( + t timestamptz, + dx_km float8, + dy_km float8, + dz_km float8, + pos_err_km float8 +) + AS 'MODULE_PATHNAME' LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE; +COMMENT ON FUNCTION tle_fit_residuals(tle, eci_position[], timestamptz[]) IS + 'Compute per-observation position residuals (km) between a TLE and ECI observations. Useful for fit quality assessment.'; + +-- Fit TLE from RA/Dec observations — single observer +-- Uses Gauss method for initial orbit determination when no seed is provided. +-- RA in hours [0,24), Dec in degrees [-90,90] (matches star_observe convention). +-- RMS output is in radians for angles-only mode. + +CREATE FUNCTION tle_from_angles( + ra_hours float8[], dec_degrees float8[], + times timestamptz[], + obs observer, + seed tle DEFAULT NULL, fit_bstar boolean DEFAULT false, + max_iter int4 DEFAULT 15, + weights float8[] DEFAULT NULL, + OUT fitted_tle tle, OUT iterations int4, + OUT rms_final float8, OUT rms_initial float8, OUT status text, + OUT condition_number float8, OUT covariance float8[], OUT nstate int4 +) RETURNS RECORD AS 'MODULE_PATHNAME' LANGUAGE C STABLE PARALLEL SAFE; +COMMENT ON FUNCTION tle_from_angles(float8[], float8[], timestamptz[], observer, tle, boolean, int4, float8[]) IS + 'Fit a TLE from angles-only (RA/Dec) observations via Gauss IOD + differential correction. RA in hours [0,24), Dec in degrees [-90,90]. RMS output in radians. Uses Gauss method for seed-free initial guess.'; + +-- Fit TLE from RA/Dec observations — multiple observers + +CREATE FUNCTION tle_from_angles( + ra_hours float8[], dec_degrees float8[], + times timestamptz[], + observers observer[], observer_ids int4[], + seed tle DEFAULT NULL, fit_bstar boolean DEFAULT false, + max_iter int4 DEFAULT 15, + weights float8[] DEFAULT NULL, + OUT fitted_tle tle, OUT iterations int4, + OUT rms_final float8, OUT rms_initial float8, OUT status text, + OUT condition_number float8, OUT covariance float8[], OUT nstate int4 +) RETURNS RECORD + AS 'MODULE_PATHNAME', 'tle_from_angles_multi' + LANGUAGE C STABLE PARALLEL SAFE; +COMMENT ON FUNCTION tle_from_angles(float8[], float8[], timestamptz[], observer[], int4[], tle, boolean, int4, float8[]) IS + 'Fit a TLE from angles-only (RA/Dec) observations from multiple ground stations via Gauss IOD + differential correction.'; +-- pg_orrery 0.6.0 -> 0.7.0 migration +-- +-- Adds SP-GiST orbital trie index for satellite pass prediction. +-- 2-level trie: SMA (L0) + inclination (L1) with query-time RAAN filter. +-- The &? operator answers "might this satellite be visible?" + +-- ============================================================ +-- observer_window composite type (query parameter bundle) +-- ============================================================ + +CREATE TYPE observer_window AS ( + obs observer, + t_start timestamptz, + t_end timestamptz, + min_el float8 +); + +COMMENT ON TYPE observer_window IS + 'Observation query parameters: observer location, time window, and minimum elevation angle (degrees). Used with the &? visibility cone operator.'; + +-- ============================================================ +-- Visibility cone operator function +-- ============================================================ + +CREATE FUNCTION tle_visibility_possible(tle, observer_window) RETURNS boolean + AS 'MODULE_PATHNAME' LANGUAGE C STABLE STRICT PARALLEL SAFE; + +COMMENT ON FUNCTION tle_visibility_possible(tle, observer_window) IS + 'Could this satellite be visible from the observer during the time window? Combines altitude, inclination, and RAAN checks. Conservative superset — survivors need SGP4 propagation for ground truth.'; + +-- ============================================================ +-- &? operator (visibility cone check) +-- ============================================================ +-- The indexed column (tle) MUST be the left argument so PostgreSQL +-- can form a ScanKey and pass it to inner_consistent for pruning. + +CREATE OPERATOR &? ( + LEFTARG = tle, + RIGHTARG = observer_window, + FUNCTION = tle_visibility_possible, + RESTRICT = contsel, + JOIN = contjoinsel +); + +COMMENT ON OPERATOR &? (tle, observer_window) IS + 'Visibility cone check: could this satellite be visible from the observer during the time window? Index-accelerated via SP-GiST orbital trie.'; + +-- ============================================================ +-- SP-GiST support functions +-- ============================================================ + +CREATE FUNCTION spgist_tle_config(internal, internal) RETURNS void + AS 'MODULE_PATHNAME' LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE; + +CREATE FUNCTION spgist_tle_choose(internal, internal) RETURNS void + AS 'MODULE_PATHNAME' LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE; + +CREATE FUNCTION spgist_tle_picksplit(internal, internal) RETURNS void + AS 'MODULE_PATHNAME' LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE; + +CREATE FUNCTION spgist_tle_inner_consistent(internal, internal) RETURNS void + AS 'MODULE_PATHNAME' LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE; + +CREATE FUNCTION spgist_tle_leaf_consistent(internal, internal) RETURNS void + AS 'MODULE_PATHNAME' LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE; + +-- ============================================================ +-- SP-GiST operator class (opt-in, not DEFAULT) +-- ============================================================ + +CREATE OPERATOR CLASS tle_spgist_ops + FOR TYPE tle USING spgist AS + OPERATOR 1 &? (tle, observer_window), + FUNCTION 1 spgist_tle_config(internal, internal), + FUNCTION 2 spgist_tle_choose(internal, internal), + FUNCTION 3 spgist_tle_picksplit(internal, internal), + FUNCTION 4 spgist_tle_inner_consistent(internal, internal), + FUNCTION 5 spgist_tle_leaf_consistent(internal, internal); +-- pg_orrery 0.7.0 -> 0.8.0 migration +-- +-- Adds orbital_elements type for comets/asteroids, MPC MPCORB.DAT parser, +-- and small_body_observe()/small_body_heliocentric() observation functions. + +-- ============================================================ +-- orbital_elements type +-- ============================================================ + +CREATE TYPE orbital_elements; + +CREATE FUNCTION orbital_elements_in(cstring) RETURNS orbital_elements + AS 'MODULE_PATHNAME' LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE; + +CREATE FUNCTION orbital_elements_out(orbital_elements) RETURNS cstring + AS 'MODULE_PATHNAME' LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE; + +CREATE FUNCTION orbital_elements_recv(internal) RETURNS orbital_elements + AS 'MODULE_PATHNAME' LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE; + +CREATE FUNCTION orbital_elements_send(orbital_elements) RETURNS bytea + AS 'MODULE_PATHNAME' LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE; + +CREATE TYPE orbital_elements ( + INPUT = orbital_elements_in, + OUTPUT = orbital_elements_out, + RECEIVE = orbital_elements_recv, + SEND = orbital_elements_send, + INTERNALLENGTH = 72, + ALIGNMENT = double, + STORAGE = plain +); + +COMMENT ON TYPE orbital_elements IS + 'Classical Keplerian orbital elements for comets and asteroids (epoch, q, e, inc, omega, Omega, tp, H, G). 72 bytes, fixed-size.'; + + +-- ============================================================ +-- Accessor functions +-- ============================================================ + +CREATE FUNCTION oe_epoch(orbital_elements) RETURNS float8 + AS 'MODULE_PATHNAME' LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE; +COMMENT ON FUNCTION oe_epoch(orbital_elements) IS 'Osculation epoch (Julian date)'; + +CREATE FUNCTION oe_perihelion(orbital_elements) RETURNS float8 + AS 'MODULE_PATHNAME' LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE; +COMMENT ON FUNCTION oe_perihelion(orbital_elements) IS 'Perihelion distance q (AU)'; + +CREATE FUNCTION oe_eccentricity(orbital_elements) RETURNS float8 + AS 'MODULE_PATHNAME' LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE; +COMMENT ON FUNCTION oe_eccentricity(orbital_elements) IS 'Eccentricity'; + +CREATE FUNCTION oe_inclination(orbital_elements) RETURNS float8 + AS 'MODULE_PATHNAME' LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE; +COMMENT ON FUNCTION oe_inclination(orbital_elements) IS 'Inclination (degrees)'; + +CREATE FUNCTION oe_arg_perihelion(orbital_elements) RETURNS float8 + AS 'MODULE_PATHNAME' LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE; +COMMENT ON FUNCTION oe_arg_perihelion(orbital_elements) IS 'Argument of perihelion (degrees)'; + +CREATE FUNCTION oe_raan(orbital_elements) RETURNS float8 + AS 'MODULE_PATHNAME' LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE; +COMMENT ON FUNCTION oe_raan(orbital_elements) IS 'Longitude of ascending node (degrees)'; + +CREATE FUNCTION oe_tp(orbital_elements) RETURNS float8 + AS 'MODULE_PATHNAME' LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE; +COMMENT ON FUNCTION oe_tp(orbital_elements) IS 'Time of perihelion passage (Julian date)'; + +CREATE FUNCTION oe_h_mag(orbital_elements) RETURNS float8 + AS 'MODULE_PATHNAME' LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE; +COMMENT ON FUNCTION oe_h_mag(orbital_elements) IS 'Absolute magnitude H (NaN if unknown)'; + +CREATE FUNCTION oe_g_slope(orbital_elements) RETURNS float8 + AS 'MODULE_PATHNAME' LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE; +COMMENT ON FUNCTION oe_g_slope(orbital_elements) IS 'Slope parameter G (NaN if unknown)'; + +CREATE FUNCTION oe_semi_major_axis(orbital_elements) RETURNS float8 + AS 'MODULE_PATHNAME' LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE; +COMMENT ON FUNCTION oe_semi_major_axis(orbital_elements) IS 'Semi-major axis a = q/(1-e) in AU. NULL for parabolic/hyperbolic orbits (e >= 1).'; + +CREATE FUNCTION oe_period_years(orbital_elements) RETURNS float8 + AS 'MODULE_PATHNAME' LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE; +COMMENT ON FUNCTION oe_period_years(orbital_elements) IS 'Orbital period in years = a^1.5 (Kepler third law). NULL for parabolic/hyperbolic orbits (e >= 1).'; + + +-- ============================================================ +-- MPC MPCORB.DAT parser +-- ============================================================ + +CREATE FUNCTION oe_from_mpc(text) RETURNS orbital_elements + AS 'MODULE_PATHNAME' LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE; +COMMENT ON FUNCTION oe_from_mpc(text) IS + 'Parse one MPCORB.DAT fixed-width line into orbital_elements. Converts MPC packed epoch, computes perihelion distance and tp from (a, e, M).'; + + +-- ============================================================ +-- Observation functions +-- ============================================================ + +CREATE FUNCTION small_body_heliocentric(orbital_elements, timestamptz) RETURNS heliocentric + AS 'MODULE_PATHNAME' LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE; +COMMENT ON FUNCTION small_body_heliocentric(orbital_elements, timestamptz) IS + 'Heliocentric ecliptic J2000 position of a comet/asteroid from its orbital elements at a given time.'; + +CREATE FUNCTION small_body_observe(orbital_elements, observer, timestamptz) RETURNS topocentric + AS 'MODULE_PATHNAME' LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE; +COMMENT ON FUNCTION small_body_observe(orbital_elements, observer, timestamptz) IS + 'Observe a comet/asteroid from orbital elements. Auto-fetches Earth via VSOP87. Returns topocentric az/el with geocentric range in km.'; +-- pg_orrery 0.8.0 -> 0.9.0 migration +-- +-- Adds equatorial type (apparent RA/Dec of date), atmospheric refraction, +-- stellar proper motion, and light-time corrected _apparent() functions. + +-- ============================================================ +-- equatorial type — apparent RA/Dec of date +-- ============================================================ + +CREATE TYPE equatorial; + +CREATE FUNCTION equatorial_in(cstring) RETURNS equatorial + AS 'MODULE_PATHNAME' LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE; + +CREATE FUNCTION equatorial_out(equatorial) RETURNS cstring + AS 'MODULE_PATHNAME' LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE; + +CREATE FUNCTION equatorial_recv(internal) RETURNS equatorial + AS 'MODULE_PATHNAME' LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE; + +CREATE FUNCTION equatorial_send(equatorial) RETURNS bytea + AS 'MODULE_PATHNAME' LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE; + +CREATE TYPE equatorial ( + INPUT = equatorial_in, + OUTPUT = equatorial_out, + RECEIVE = equatorial_recv, + SEND = equatorial_send, + INTERNALLENGTH = 24, + ALIGNMENT = double, + STORAGE = plain +); + +COMMENT ON TYPE equatorial IS + 'Apparent equatorial coordinates of date: RA (hours), Dec (degrees), distance (km). Solar system: J2000 precessed via IAU 1976. Satellites: TEME frame (~of-date to ~arcsecond). 24 bytes, fixed-size.'; + + +-- ============================================================ +-- Equatorial accessor functions +-- ============================================================ + +CREATE FUNCTION eq_ra(equatorial) RETURNS float8 + AS 'MODULE_PATHNAME' LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE; +COMMENT ON FUNCTION eq_ra(equatorial) IS 'Right ascension in hours [0, 24)'; + +CREATE FUNCTION eq_dec(equatorial) RETURNS float8 + AS 'MODULE_PATHNAME' LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE; +COMMENT ON FUNCTION eq_dec(equatorial) IS 'Declination in degrees [-90, 90]'; + +CREATE FUNCTION eq_distance(equatorial) RETURNS float8 + AS 'MODULE_PATHNAME' LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE; +COMMENT ON FUNCTION eq_distance(equatorial) IS 'Distance in km (0 for stars without parallax)'; + + +-- ============================================================ +-- Satellite RA/Dec functions +-- ============================================================ + +CREATE FUNCTION eci_to_equatorial(eci_position, observer, timestamptz) RETURNS equatorial + AS 'MODULE_PATHNAME' LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE; +COMMENT ON FUNCTION eci_to_equatorial(eci_position, observer, timestamptz) IS + 'Topocentric apparent RA/Dec from ECI position. Observer parallax-corrected — LEO parallax is ~1 degree.'; + +CREATE FUNCTION eci_to_equatorial_geo(eci_position, timestamptz) RETURNS equatorial + AS 'MODULE_PATHNAME' LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE; +COMMENT ON FUNCTION eci_to_equatorial_geo(eci_position, timestamptz) IS + 'Geocentric apparent RA/Dec from ECI position. Observer-independent — the direction of the TEME position vector.'; + + +-- ============================================================ +-- Solar system equatorial functions (VSOP87) +-- ============================================================ + +CREATE FUNCTION planet_equatorial(int4, timestamptz) RETURNS equatorial + AS 'MODULE_PATHNAME' LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE; +COMMENT ON FUNCTION planet_equatorial(int4, timestamptz) IS + 'Geocentric apparent RA/Dec of a planet via VSOP87. Body IDs: 1=Mercury through 8=Neptune.'; + +CREATE FUNCTION sun_equatorial(timestamptz) RETURNS equatorial + AS 'MODULE_PATHNAME' LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE; +COMMENT ON FUNCTION sun_equatorial(timestamptz) IS + 'Geocentric apparent RA/Dec of the Sun via VSOP87.'; + +CREATE FUNCTION moon_equatorial(timestamptz) RETURNS equatorial + AS 'MODULE_PATHNAME' LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE; +COMMENT ON FUNCTION moon_equatorial(timestamptz) IS + 'Geocentric apparent RA/Dec of the Moon via ELP2000-82B.'; + +CREATE FUNCTION small_body_equatorial(orbital_elements, timestamptz) RETURNS equatorial + AS 'MODULE_PATHNAME' LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE; +COMMENT ON FUNCTION small_body_equatorial(orbital_elements, timestamptz) IS + 'Geocentric apparent RA/Dec of a comet/asteroid from orbital elements. Earth via VSOP87.'; + +CREATE FUNCTION star_equatorial(float8, float8, timestamptz) RETURNS equatorial + AS 'MODULE_PATHNAME' LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE; +COMMENT ON FUNCTION star_equatorial(float8, float8, timestamptz) IS + 'Apparent RA/Dec of a star at a given time. Precesses J2000 catalog coordinates (RA hours, Dec degrees) to date via IAU 1976.'; + + +-- ============================================================ +-- Atmospheric refraction (Bennett 1982) +-- ============================================================ + +CREATE FUNCTION atmospheric_refraction(float8) RETURNS float8 + AS 'MODULE_PATHNAME' LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE; +COMMENT ON FUNCTION atmospheric_refraction(float8) IS + 'Atmospheric refraction correction in degrees for a given geometric elevation (degrees). Standard atmosphere: P=1010 mbar, T=10C. Bennett (1982) formula with domain guard at -1 degree.'; + +CREATE FUNCTION atmospheric_refraction_ext(float8, float8, float8) RETURNS float8 + AS 'MODULE_PATHNAME' LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE; +COMMENT ON FUNCTION atmospheric_refraction_ext(float8, float8, float8) IS + 'Atmospheric refraction with pressure/temperature correction. Args: elevation_deg, pressure_mbar, temperature_celsius. Meeus P/T factor applied to Bennett formula.'; + +CREATE FUNCTION topo_elevation_apparent(topocentric) RETURNS float8 + AS 'MODULE_PATHNAME' LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE; +COMMENT ON FUNCTION topo_elevation_apparent(topocentric) IS + 'Apparent elevation in degrees — geometric elevation plus atmospheric refraction correction.'; + + +-- ============================================================ +-- Refracted pass prediction +-- ============================================================ + +CREATE FUNCTION predict_passes_refracted( + tle, observer, timestamptz, timestamptz, float8 DEFAULT 0.0 +) RETURNS SETOF pass_event + AS 'MODULE_PATHNAME' LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE + ROWS 20; +COMMENT ON FUNCTION predict_passes_refracted(tle, observer, timestamptz, timestamptz, float8) IS + 'Predict satellite passes using a refracted horizon threshold (-0.569 deg geometric). Atmospheric refraction makes satellites visible ~35 seconds earlier at AOS and later at LOS.'; + + +-- ============================================================ +-- Stellar proper motion +-- ============================================================ + +CREATE FUNCTION star_observe_pm( + float8, float8, float8, float8, float8, float8, observer, timestamptz +) RETURNS topocentric + AS 'MODULE_PATHNAME' LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE; +COMMENT ON FUNCTION star_observe_pm(float8, float8, float8, float8, float8, float8, observer, timestamptz) IS + 'Observe a star with proper motion. Args: ra_hours, dec_deg, pm_ra_masyr (mu_alpha*cos(delta)), pm_dec_masyr, parallax_mas, rv_kms, observer, time. Hipparcos/Gaia convention for pm_ra.'; + +CREATE FUNCTION star_equatorial_pm( + float8, float8, float8, float8, float8, float8, timestamptz +) RETURNS equatorial + AS 'MODULE_PATHNAME' LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE; +COMMENT ON FUNCTION star_equatorial_pm(float8, float8, float8, float8, float8, float8, timestamptz) IS + 'Apparent RA/Dec of a star with proper motion. Args: ra_hours, dec_deg, pm_ra_masyr, pm_dec_masyr, parallax_mas, rv_kms, time. Distance from parallax if > 0.'; + + +-- ============================================================ +-- Light-time corrected observation functions +-- ============================================================ + +CREATE FUNCTION planet_observe_apparent(int4, observer, timestamptz) RETURNS topocentric + AS 'MODULE_PATHNAME' LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE; +COMMENT ON FUNCTION planet_observe_apparent(int4, observer, timestamptz) IS + 'Observe a planet with single-iteration light-time correction. Body at retarded time, Earth at observation time. VSOP87.'; + +CREATE FUNCTION sun_observe_apparent(observer, timestamptz) RETURNS topocentric + AS 'MODULE_PATHNAME' LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE; +COMMENT ON FUNCTION sun_observe_apparent(observer, timestamptz) IS + 'Observe the Sun with light-time correction (~8.3 min). VSOP87.'; + +CREATE FUNCTION small_body_observe_apparent(orbital_elements, observer, timestamptz) RETURNS topocentric + AS 'MODULE_PATHNAME' LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE; +COMMENT ON FUNCTION small_body_observe_apparent(orbital_elements, observer, timestamptz) IS + 'Observe a comet/asteroid with single-iteration light-time correction. Kepler propagation at retarded time, Earth via VSOP87 at observation time.'; + + +-- ============================================================ +-- Light-time corrected equatorial functions +-- ============================================================ + +CREATE FUNCTION planet_equatorial_apparent(int4, timestamptz) RETURNS equatorial + AS 'MODULE_PATHNAME' LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE; +COMMENT ON FUNCTION planet_equatorial_apparent(int4, timestamptz) IS + 'Geocentric apparent RA/Dec of a planet with light-time correction. VSOP87.'; + +CREATE FUNCTION moon_equatorial_apparent(timestamptz) RETURNS equatorial + AS 'MODULE_PATHNAME' LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE; +COMMENT ON FUNCTION moon_equatorial_apparent(timestamptz) IS + 'Geocentric apparent RA/Dec of the Moon with light-time correction (~1.3 sec). ELP2000-82B.'; + +CREATE FUNCTION small_body_equatorial_apparent(orbital_elements, timestamptz) RETURNS equatorial + AS 'MODULE_PATHNAME' LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE; +COMMENT ON FUNCTION small_body_equatorial_apparent(orbital_elements, timestamptz) IS + 'Geocentric apparent RA/Dec of a comet/asteroid with light-time correction.'; + + +-- ============================================================ +-- DE ephemeris equatorial variants (STABLE) +-- ============================================================ + +CREATE FUNCTION planet_equatorial_de(int4, timestamptz) RETURNS equatorial + AS 'MODULE_PATHNAME' LANGUAGE C STABLE STRICT PARALLEL SAFE; +COMMENT ON FUNCTION planet_equatorial_de(int4, timestamptz) IS + 'Geocentric apparent RA/Dec of a planet via JPL DE ephemeris (falls back to VSOP87 + equatorial).'; + +CREATE FUNCTION moon_equatorial_de(timestamptz) RETURNS equatorial + AS 'MODULE_PATHNAME' LANGUAGE C STABLE STRICT PARALLEL SAFE; +COMMENT ON FUNCTION moon_equatorial_de(timestamptz) IS + 'Geocentric apparent RA/Dec of the Moon via JPL DE ephemeris (falls back to ELP2000-82B + equatorial).'; +-- pg_orrery 0.9.0 -> 0.10.0 migration +-- +-- Adds annual aberration to existing _apparent() functions, +-- 6 new _apparent_de() variants, equatorial angular separation +-- operator and cone predicate, and stellar annual parallax. + +-- ============================================================ +-- Equatorial angular distance and cone search +-- ============================================================ + +CREATE FUNCTION eq_angular_distance(equatorial, equatorial) RETURNS float8 + AS 'MODULE_PATHNAME' LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE; +COMMENT ON FUNCTION eq_angular_distance(equatorial, equatorial) IS + 'Angular separation in degrees between two equatorial positions. Vincenty formula (stable at 0 and 180 degrees).'; + +CREATE FUNCTION eq_within_cone(equatorial, equatorial, float8) RETURNS bool + AS 'MODULE_PATHNAME' LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE; +COMMENT ON FUNCTION eq_within_cone(equatorial, equatorial, float8) IS + 'True if first position is within radius_deg of second position. Cosine shortcut for fast rejection.'; + +CREATE OPERATOR <-> ( + LEFTARG = equatorial, + RIGHTARG = equatorial, + FUNCTION = eq_angular_distance, + COMMUTATOR = <-> +); +COMMENT ON OPERATOR <-> (equatorial, equatorial) IS + 'Angular separation in degrees between two equatorial positions.'; + + +-- ============================================================ +-- DE apparent observation functions (STABLE, light-time + aberration) +-- ============================================================ + +CREATE FUNCTION planet_observe_apparent_de(int4, observer, timestamptz) RETURNS topocentric + AS 'MODULE_PATHNAME' LANGUAGE C STABLE STRICT PARALLEL SAFE; +COMMENT ON FUNCTION planet_observe_apparent_de(int4, observer, timestamptz) IS + 'Observe a planet with light-time correction and annual aberration via JPL DE (falls back to VSOP87).'; + +CREATE FUNCTION sun_observe_apparent_de(observer, timestamptz) RETURNS topocentric + AS 'MODULE_PATHNAME' LANGUAGE C STABLE STRICT PARALLEL SAFE; +COMMENT ON FUNCTION sun_observe_apparent_de(observer, timestamptz) IS + 'Observe the Sun with aberration via JPL DE (falls back to VSOP87).'; + +CREATE FUNCTION moon_observe_apparent_de(observer, timestamptz) RETURNS topocentric + AS 'MODULE_PATHNAME' LANGUAGE C STABLE STRICT PARALLEL SAFE; +COMMENT ON FUNCTION moon_observe_apparent_de(observer, timestamptz) IS + 'Observe the Moon with light-time correction and annual aberration via JPL DE (falls back to ELP2000-82B).'; + +CREATE FUNCTION planet_equatorial_apparent_de(int4, timestamptz) RETURNS equatorial + AS 'MODULE_PATHNAME' LANGUAGE C STABLE STRICT PARALLEL SAFE; +COMMENT ON FUNCTION planet_equatorial_apparent_de(int4, timestamptz) IS + 'Geocentric apparent RA/Dec of a planet with light-time correction and annual aberration via JPL DE (falls back to VSOP87).'; + +CREATE FUNCTION moon_equatorial_apparent_de(timestamptz) RETURNS equatorial + AS 'MODULE_PATHNAME' LANGUAGE C STABLE STRICT PARALLEL SAFE; +COMMENT ON FUNCTION moon_equatorial_apparent_de(timestamptz) IS + 'Geocentric apparent RA/Dec of the Moon with light-time correction and annual aberration via JPL DE (falls back to ELP2000-82B).'; + +CREATE FUNCTION small_body_observe_apparent_de(orbital_elements, observer, timestamptz) RETURNS topocentric + AS 'MODULE_PATHNAME' LANGUAGE C STABLE STRICT PARALLEL SAFE; +COMMENT ON FUNCTION small_body_observe_apparent_de(orbital_elements, observer, timestamptz) IS + 'Observe a comet/asteroid with light-time correction and annual aberration. Earth position via JPL DE (falls back to VSOP87).'; +-- pg_orrery 0.10.0 -> 0.11.0 migration +-- +-- Adds make_orbital_elements() constructors and +-- geocentric equatorial functions for planetary moons. + +-- ============================================================ +-- orbital_elements constructors +-- ============================================================ + +CREATE FUNCTION make_orbital_elements( + epoch_jd float8, q_au float8, e float8, + inc_rad float8, omega_rad float8, node_rad float8, + tp_jd float8, h_mag float8, g_slope float8 +) RETURNS orbital_elements + AS 'MODULE_PATHNAME' LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE; +COMMENT ON FUNCTION make_orbital_elements(float8,float8,float8,float8,float8,float8,float8,float8,float8) IS + 'Construct orbital_elements from 9 floats (angular elements in radians).'; + +CREATE FUNCTION make_orbital_elements_deg( + epoch_jd float8, q_au float8, e float8, + inc_deg float8, omega_deg float8, node_deg float8, + tp_jd float8, h_mag float8, g_slope float8 +) RETURNS orbital_elements + AS 'MODULE_PATHNAME' LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE; +COMMENT ON FUNCTION make_orbital_elements_deg(float8,float8,float8,float8,float8,float8,float8,float8,float8) IS + 'Construct orbital_elements from 9 floats (angular elements in degrees). Matches text I/O and most catalog column layouts.'; + + +-- ============================================================ +-- Planetary moon equatorial functions +-- ============================================================ + +CREATE FUNCTION galilean_equatorial(int4, timestamptz) RETURNS equatorial + AS 'MODULE_PATHNAME' LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE; +COMMENT ON FUNCTION galilean_equatorial(int4, timestamptz) IS + 'Geometric geocentric RA/Dec of a Galilean moon (0=Io, 1=Europa, 2=Ganymede, 3=Callisto). L1.2 theory + VSOP87. No light-time or aberration correction.'; + +CREATE FUNCTION saturn_moon_equatorial(int4, timestamptz) RETURNS equatorial + AS 'MODULE_PATHNAME' LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE; +COMMENT ON FUNCTION saturn_moon_equatorial(int4, timestamptz) IS + 'Geometric geocentric RA/Dec of a Saturn moon (0=Mimas..7=Hyperion). TASS17 theory + VSOP87. No light-time or aberration correction.'; + +CREATE FUNCTION uranus_moon_equatorial(int4, timestamptz) RETURNS equatorial + AS 'MODULE_PATHNAME' LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE; +COMMENT ON FUNCTION uranus_moon_equatorial(int4, timestamptz) IS + 'Geometric geocentric RA/Dec of a Uranus moon (0=Miranda..4=Oberon). GUST86 theory + VSOP87. No light-time or aberration correction.'; + +CREATE FUNCTION mars_moon_equatorial(int4, timestamptz) RETURNS equatorial + AS 'MODULE_PATHNAME' LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE; +COMMENT ON FUNCTION mars_moon_equatorial(int4, timestamptz) IS + 'Geometric geocentric RA/Dec of a Mars moon (0=Phobos, 1=Deimos). MarsSat theory + VSOP87. No light-time or aberration correction.'; +-- pg_orrery 0.11.0 -> 0.12.0 migration +-- +-- Adds equatorial GiST operator class for KNN sky queries +-- and DE moon equatorial functions for all 4 planetary moon families. + +-- ============================================================ +-- GiST support functions for equatorial type +-- ============================================================ + +CREATE FUNCTION gist_eq_consistent(internal, equatorial, smallint, oid, internal) RETURNS bool + AS 'MODULE_PATHNAME' LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE; + +CREATE FUNCTION gist_eq_union(internal, internal) RETURNS internal + AS 'MODULE_PATHNAME' LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE; + +CREATE FUNCTION gist_eq_compress(internal) RETURNS internal + AS 'MODULE_PATHNAME' LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE; + +CREATE FUNCTION gist_eq_decompress(internal) RETURNS internal + AS 'MODULE_PATHNAME' LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE; + +CREATE FUNCTION gist_eq_penalty(internal, internal, internal) RETURNS internal + AS 'MODULE_PATHNAME' LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE; + +CREATE FUNCTION gist_eq_picksplit(internal, internal) RETURNS internal + AS 'MODULE_PATHNAME' LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE; + +CREATE FUNCTION gist_eq_same(internal, internal, internal) RETURNS internal + AS 'MODULE_PATHNAME' LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE; + +CREATE FUNCTION gist_eq_distance(internal, equatorial, smallint, oid, internal) RETURNS float8 + AS 'MODULE_PATHNAME' LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE; + +-- ============================================================ +-- Equatorial GiST operator class (KNN ordering only) +-- ============================================================ + +CREATE OPERATOR CLASS eq_gist_ops + DEFAULT FOR TYPE equatorial USING gist AS + OPERATOR 15 <-> (equatorial, equatorial) FOR ORDER BY pg_catalog.float_ops, + FUNCTION 1 gist_eq_consistent(internal, equatorial, smallint, oid, internal), + FUNCTION 2 gist_eq_union(internal, internal), + FUNCTION 3 gist_eq_compress(internal), + FUNCTION 4 gist_eq_decompress(internal), + FUNCTION 5 gist_eq_penalty(internal, internal, internal), + FUNCTION 6 gist_eq_picksplit(internal, internal), + FUNCTION 7 gist_eq_same(internal, internal, internal), + FUNCTION 8 gist_eq_distance(internal, equatorial, smallint, oid, internal); + +-- ============================================================ +-- DE moon equatorial functions (STABLE, fall back to VSOP87) +-- ============================================================ + +CREATE FUNCTION galilean_equatorial_de(int4, timestamptz) RETURNS equatorial + AS 'MODULE_PATHNAME' LANGUAGE C STABLE STRICT PARALLEL SAFE; +COMMENT ON FUNCTION galilean_equatorial_de(int4, timestamptz) IS + 'Geocentric RA/Dec of a Galilean moon via DE parent position (falls back to VSOP87). 0=Io, 1=Europa, 2=Ganymede, 3=Callisto.'; + +CREATE FUNCTION saturn_moon_equatorial_de(int4, timestamptz) RETURNS equatorial + AS 'MODULE_PATHNAME' LANGUAGE C STABLE STRICT PARALLEL SAFE; +COMMENT ON FUNCTION saturn_moon_equatorial_de(int4, timestamptz) IS + 'Geocentric RA/Dec of a Saturn moon via DE parent position (falls back to VSOP87). 0=Mimas..7=Hyperion.'; + +CREATE FUNCTION uranus_moon_equatorial_de(int4, timestamptz) RETURNS equatorial + AS 'MODULE_PATHNAME' LANGUAGE C STABLE STRICT PARALLEL SAFE; +COMMENT ON FUNCTION uranus_moon_equatorial_de(int4, timestamptz) IS + 'Geocentric RA/Dec of a Uranus moon via DE parent position (falls back to VSOP87). 0=Miranda..4=Oberon.'; + +CREATE FUNCTION mars_moon_equatorial_de(int4, timestamptz) RETURNS equatorial + AS 'MODULE_PATHNAME' LANGUAGE C STABLE STRICT PARALLEL SAFE; +COMMENT ON FUNCTION mars_moon_equatorial_de(int4, timestamptz) IS + 'Geocentric RA/Dec of a Mars moon via DE parent position (falls back to VSOP87). 0=Phobos, 1=Deimos.'; + + +-- ============================================================ +-- v0.13.0: make_equatorial() constructor +-- ============================================================ + +CREATE FUNCTION make_equatorial(ra_hours float8, dec_deg float8, distance_km float8) + RETURNS equatorial + AS 'MODULE_PATHNAME', 'make_equatorial' + LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE; + +COMMENT ON FUNCTION make_equatorial(float8, float8, float8) IS + 'Construct equatorial from RA (hours [0,24)), Dec (degrees [-90,90]), distance (km).'; + + +-- ============================================================ +-- v0.13.0: Rise/set prediction functions +-- ============================================================ + +CREATE FUNCTION planet_next_rise(body_id int4, obs observer, t timestamptz) RETURNS timestamptz + AS 'MODULE_PATHNAME' LANGUAGE C STABLE STRICT PARALLEL SAFE; +COMMENT ON FUNCTION planet_next_rise(int4, observer, timestamptz) IS + 'Next geometric rise time for a planet. Returns NULL if no rise within 7 days. body_id: 1=Mercury..8=Neptune.'; + +CREATE FUNCTION planet_next_set(body_id int4, obs observer, t timestamptz) RETURNS timestamptz + AS 'MODULE_PATHNAME' LANGUAGE C STABLE STRICT PARALLEL SAFE; +COMMENT ON FUNCTION planet_next_set(int4, observer, timestamptz) IS + 'Next geometric set time for a planet. Returns NULL if no set within 7 days. body_id: 1=Mercury..8=Neptune.'; + +CREATE FUNCTION sun_next_rise(obs observer, t timestamptz) RETURNS timestamptz + AS 'MODULE_PATHNAME' LANGUAGE C STABLE STRICT PARALLEL SAFE; +COMMENT ON FUNCTION sun_next_rise(observer, timestamptz) IS + 'Next geometric sunrise. Returns NULL if Sun does not rise within 7 days (polar night).'; + +CREATE FUNCTION sun_next_set(obs observer, t timestamptz) RETURNS timestamptz + AS 'MODULE_PATHNAME' LANGUAGE C STABLE STRICT PARALLEL SAFE; +COMMENT ON FUNCTION sun_next_set(observer, timestamptz) IS + 'Next geometric sunset. Returns NULL if Sun does not set within 7 days (midnight sun).'; + +CREATE FUNCTION moon_next_rise(obs observer, t timestamptz) RETURNS timestamptz + AS 'MODULE_PATHNAME' LANGUAGE C STABLE STRICT PARALLEL SAFE; +COMMENT ON FUNCTION moon_next_rise(observer, timestamptz) IS + 'Next geometric moonrise. Returns NULL if Moon does not rise within 7 days.'; + +CREATE FUNCTION moon_next_set(obs observer, t timestamptz) RETURNS timestamptz + AS 'MODULE_PATHNAME' LANGUAGE C STABLE STRICT PARALLEL SAFE; +COMMENT ON FUNCTION moon_next_set(observer, timestamptz) IS + 'Next geometric moonset. Returns NULL if Moon does not set within 7 days.'; + +CREATE FUNCTION sun_next_rise_refracted(obs observer, t timestamptz) RETURNS timestamptz + AS 'MODULE_PATHNAME' LANGUAGE C STABLE STRICT PARALLEL SAFE; +COMMENT ON FUNCTION sun_next_rise_refracted(observer, timestamptz) IS + 'Next refracted sunrise (-0.833 deg threshold: refraction + semidiameter). Earlier than geometric by ~4 min.'; + +CREATE FUNCTION sun_next_set_refracted(obs observer, t timestamptz) RETURNS timestamptz + AS 'MODULE_PATHNAME' LANGUAGE C STABLE STRICT PARALLEL SAFE; +COMMENT ON FUNCTION sun_next_set_refracted(observer, timestamptz) IS + 'Next refracted sunset (-0.833 deg threshold: refraction + semidiameter). Later than geometric by ~4 min.'; + + +-- ============================================================ +-- v0.14.0: Refracted planet/moon rise/set +-- ============================================================ + +CREATE FUNCTION planet_next_rise_refracted(body_id int4, obs observer, t timestamptz) RETURNS timestamptz + AS 'MODULE_PATHNAME' LANGUAGE C STABLE STRICT PARALLEL SAFE; +COMMENT ON FUNCTION planet_next_rise_refracted(int4, observer, timestamptz) IS + 'Next refracted rise time for a planet (-0.569 deg threshold: atmospheric refraction only). Earlier than geometric.'; + +CREATE FUNCTION planet_next_set_refracted(body_id int4, obs observer, t timestamptz) RETURNS timestamptz + AS 'MODULE_PATHNAME' LANGUAGE C STABLE STRICT PARALLEL SAFE; +COMMENT ON FUNCTION planet_next_set_refracted(int4, observer, timestamptz) IS + 'Next refracted set time for a planet (-0.569 deg threshold: atmospheric refraction only). Later than geometric.'; + +CREATE FUNCTION moon_next_rise_refracted(obs observer, t timestamptz) RETURNS timestamptz + AS 'MODULE_PATHNAME' LANGUAGE C STABLE STRICT PARALLEL SAFE; +COMMENT ON FUNCTION moon_next_rise_refracted(observer, timestamptz) IS + 'Next refracted moonrise (-0.833 deg threshold: refraction + semidiameter). Earlier than geometric.'; + +CREATE FUNCTION moon_next_set_refracted(obs observer, t timestamptz) RETURNS timestamptz + AS 'MODULE_PATHNAME' LANGUAGE C STABLE STRICT PARALLEL SAFE; +COMMENT ON FUNCTION moon_next_set_refracted(observer, timestamptz) IS + 'Next refracted moonset (-0.833 deg threshold: refraction + semidiameter). Later than geometric.'; + + +-- ============================================================ +-- v0.14.0: Constellation identification (Roman 1987, CDS VI/42) +-- ============================================================ + +CREATE FUNCTION constellation(eq equatorial) RETURNS text + AS 'MODULE_PATHNAME', 'constellation_from_equatorial' + LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE; +COMMENT ON FUNCTION constellation(equatorial) IS + 'IAU constellation abbreviation (3 letters) from equatorial coordinates (Roman 1987).'; + +CREATE FUNCTION constellation(ra_hours float8, dec_deg float8) RETURNS text + AS 'MODULE_PATHNAME', 'constellation_from_radec' + LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE; +COMMENT ON FUNCTION constellation(float8, float8) IS + 'IAU constellation from J2000 RA (hours [0,24)) and Dec (degrees [-90,90]).'; +-- pg_orrery 0.14.0 -> 0.15.0 migration +-- +-- Adds: constellation_full_name (1 function), +-- rise/set status diagnostics (3 functions). + +-- ============================================================ +-- Constellation full name lookup +-- ============================================================ + +CREATE FUNCTION constellation_full_name(abbr text) RETURNS text + AS 'MODULE_PATHNAME', 'constellation_full_name_from_abbr' + LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE; +COMMENT ON FUNCTION constellation_full_name(text) IS + 'Full IAU constellation name from 3-letter abbreviation. Returns NULL for invalid abbreviation.'; + +-- ============================================================ +-- Rise/set status diagnostics +-- ============================================================ + +CREATE FUNCTION sun_rise_set_status(obs observer, t timestamptz) RETURNS text + AS 'MODULE_PATHNAME' LANGUAGE C STABLE STRICT PARALLEL SAFE; +COMMENT ON FUNCTION sun_rise_set_status(observer, timestamptz) IS + 'Classify Sun visibility: rises_and_sets, circumpolar, or never_rises.'; + +CREATE FUNCTION moon_rise_set_status(obs observer, t timestamptz) RETURNS text + AS 'MODULE_PATHNAME' LANGUAGE C STABLE STRICT PARALLEL SAFE; +COMMENT ON FUNCTION moon_rise_set_status(observer, timestamptz) IS + 'Classify Moon visibility: rises_and_sets, circumpolar, or never_rises.'; + +CREATE FUNCTION planet_rise_set_status(body_id int4, obs observer, t timestamptz) RETURNS text + AS 'MODULE_PATHNAME' LANGUAGE C STABLE STRICT PARALLEL SAFE; +COMMENT ON FUNCTION planet_rise_set_status(int4, observer, timestamptz) IS + 'Classify planet visibility: rises_and_sets, circumpolar, or never_rises. Body IDs 1-8 (Mercury-Neptune).'; +-- pg_orrery 0.15.0 -> 0.16.0: twilight, lunar phase, planet magnitude + +-- ============================================================ +-- Twilight functions (6) +-- ============================================================ + +CREATE FUNCTION sun_civil_dawn(observer, timestamptz) RETURNS timestamptz + AS 'MODULE_PATHNAME', 'sun_civil_dawn' + LANGUAGE C STABLE STRICT PARALLEL SAFE; +COMMENT ON FUNCTION sun_civil_dawn(observer, timestamptz) IS + 'Next civil dawn (Sun crosses -6 deg rising). Outdoor activities without artificial light.'; + +CREATE FUNCTION sun_civil_dusk(observer, timestamptz) RETURNS timestamptz + AS 'MODULE_PATHNAME', 'sun_civil_dusk' + LANGUAGE C STABLE STRICT PARALLEL SAFE; +COMMENT ON FUNCTION sun_civil_dusk(observer, timestamptz) IS + 'Next civil dusk (Sun crosses -6 deg setting). Artificial light needed.'; + +CREATE FUNCTION sun_nautical_dawn(observer, timestamptz) RETURNS timestamptz + AS 'MODULE_PATHNAME', 'sun_nautical_dawn' + LANGUAGE C STABLE STRICT PARALLEL SAFE; +COMMENT ON FUNCTION sun_nautical_dawn(observer, timestamptz) IS + 'Next nautical dawn (Sun crosses -12 deg rising). Horizon visible at sea.'; + +CREATE FUNCTION sun_nautical_dusk(observer, timestamptz) RETURNS timestamptz + AS 'MODULE_PATHNAME', 'sun_nautical_dusk' + LANGUAGE C STABLE STRICT PARALLEL SAFE; +COMMENT ON FUNCTION sun_nautical_dusk(observer, timestamptz) IS + 'Next nautical dusk (Sun crosses -12 deg setting). Horizon no longer visible at sea.'; + +CREATE FUNCTION sun_astronomical_dawn(observer, timestamptz) RETURNS timestamptz + AS 'MODULE_PATHNAME', 'sun_astronomical_dawn' + LANGUAGE C STABLE STRICT PARALLEL SAFE; +COMMENT ON FUNCTION sun_astronomical_dawn(observer, timestamptz) IS + 'Next astronomical dawn (Sun crosses -18 deg rising). Sky was fully dark.'; + +CREATE FUNCTION sun_astronomical_dusk(observer, timestamptz) RETURNS timestamptz + AS 'MODULE_PATHNAME', 'sun_astronomical_dusk' + LANGUAGE C STABLE STRICT PARALLEL SAFE; +COMMENT ON FUNCTION sun_astronomical_dusk(observer, timestamptz) IS + 'Next astronomical dusk (Sun crosses -18 deg setting). Sky becomes fully dark.'; + +-- ============================================================ +-- Lunar phase functions (4) +-- ============================================================ + +CREATE FUNCTION moon_phase_angle(timestamptz) RETURNS float8 + AS 'MODULE_PATHNAME', 'moon_phase_angle' + LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE; +COMMENT ON FUNCTION moon_phase_angle(timestamptz) IS + 'Sun-Earth-Moon phase angle in degrees [0,360). 0=new, 90=first quarter, 180=full, 270=last quarter.'; + +CREATE FUNCTION moon_illumination(timestamptz) RETURNS float8 + AS 'MODULE_PATHNAME', 'moon_illumination' + LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE; +COMMENT ON FUNCTION moon_illumination(timestamptz) IS + 'Illuminated fraction of the Moon disk [0.0, 1.0].'; + +CREATE FUNCTION moon_phase_name(timestamptz) RETURNS text + AS 'MODULE_PATHNAME', 'moon_phase_name' + LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE; +COMMENT ON FUNCTION moon_phase_name(timestamptz) IS + 'Moon phase name: new_moon, waxing_crescent, first_quarter, waxing_gibbous, full_moon, waning_gibbous, last_quarter, waning_crescent.'; + +CREATE FUNCTION moon_age(timestamptz) RETURNS float8 + AS 'MODULE_PATHNAME', 'moon_age' + LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE; +COMMENT ON FUNCTION moon_age(timestamptz) IS + 'Days since last new moon [0, ~29.53), approximated from phase angle.'; + +-- ============================================================ +-- Planet magnitude (1) +-- ============================================================ + +CREATE FUNCTION planet_magnitude(int4, timestamptz) RETURNS float8 + AS 'MODULE_PATHNAME', 'planet_magnitude' + LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE; +COMMENT ON FUNCTION planet_magnitude(int4, timestamptz) IS + 'Apparent visual magnitude of a planet (Mallama & Hilton 2018). Body IDs 1-8. Saturn ring tilt not modeled.'; +-- pg_orrery 0.16.0 -> 0.17.0: solar elongation, planet phase, satellite eclipse, +-- observing night quality, lunar libration + +-- ============================================================ +-- Solar elongation (1) +-- ============================================================ + +CREATE FUNCTION solar_elongation(int4, timestamptz) RETURNS float8 + AS 'MODULE_PATHNAME', 'solar_elongation' + LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE; +COMMENT ON FUNCTION solar_elongation(int4, timestamptz) IS + 'Sun-Earth-Planet angle in degrees [0, 180]. How far a planet appears from the Sun. Body IDs 1-8.'; + +-- ============================================================ +-- Planet phase fraction (1) +-- ============================================================ + +CREATE FUNCTION planet_phase(int4, timestamptz) RETURNS float8 + AS 'MODULE_PATHNAME', 'planet_phase' + LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE; +COMMENT ON FUNCTION planet_phase(int4, timestamptz) IS + 'Illuminated fraction of a planet disk as seen from Earth [0.0, 1.0]. Body IDs 1-8.'; + +-- ============================================================ +-- Satellite eclipse prediction (4) +-- ============================================================ + +CREATE FUNCTION satellite_is_eclipsed(tle, timestamptz) RETURNS bool + AS 'MODULE_PATHNAME', 'satellite_is_eclipsed' + LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE; +COMMENT ON FUNCTION satellite_is_eclipsed(tle, timestamptz) IS + 'True if the satellite is in Earth cylindrical shadow at the given time.'; + +CREATE FUNCTION satellite_next_eclipse_entry(tle, timestamptz) RETURNS timestamptz + AS 'MODULE_PATHNAME', 'satellite_next_eclipse_entry' + LANGUAGE C STABLE STRICT PARALLEL SAFE; +COMMENT ON FUNCTION satellite_next_eclipse_entry(tle, timestamptz) IS + 'Next time the satellite enters Earth shadow (up to 7-day search). NULL if none found.'; + +CREATE FUNCTION satellite_next_eclipse_exit(tle, timestamptz) RETURNS timestamptz + AS 'MODULE_PATHNAME', 'satellite_next_eclipse_exit' + LANGUAGE C STABLE STRICT PARALLEL SAFE; +COMMENT ON FUNCTION satellite_next_eclipse_exit(tle, timestamptz) IS + 'Next time the satellite exits Earth shadow (up to 7-day search). NULL if none found.'; + +CREATE FUNCTION satellite_eclipse_fraction(tle, timestamptz, timestamptz) RETURNS float8 + AS 'MODULE_PATHNAME', 'satellite_eclipse_fraction' + LANGUAGE C STABLE STRICT PARALLEL SAFE; +COMMENT ON FUNCTION satellite_eclipse_fraction(tle, timestamptz, timestamptz) IS + 'Fraction of the given time window the satellite spends in eclipse [0.0, 1.0].'; + +-- ============================================================ +-- Observing night quality (1) +-- ============================================================ + +CREATE FUNCTION observing_night_quality(observer, timestamptz DEFAULT NOW()) +RETURNS text AS $$ +DECLARE + astro_dusk timestamptz; + astro_dawn timestamptz; + dark_hours float8; + illum float8; + moon_up bool; + score int := 100; +BEGIN + -- Astronomical darkness window + astro_dusk := sun_astronomical_dusk($1, $2); + IF astro_dusk IS NULL THEN + RETURN 'poor'; -- No astronomical darkness (polar summer) + END IF; + astro_dawn := sun_astronomical_dawn($1, astro_dusk); + IF astro_dawn IS NULL THEN + RETURN 'poor'; + END IF; + + dark_hours := extract(epoch FROM astro_dawn - astro_dusk) / 3600.0; + + -- Short dark window penalty + IF dark_hours < 2.0 THEN score := score - 40; + ELSIF dark_hours < 4.0 THEN score := score - 20; + ELSIF dark_hours < 6.0 THEN score := score - 10; + END IF; + + -- Moon illumination penalty + illum := moon_illumination(astro_dusk); + IF illum > 0.75 THEN + -- Check if Moon is above horizon during darkness + moon_up := topo_elevation(moon_observe($1, astro_dusk)) > 0 + OR topo_elevation(moon_observe($1, astro_dusk + (astro_dawn - astro_dusk) / 2)) > 0; + IF moon_up THEN + score := score - (illum * 30)::int; -- Up to -30 for full moon + END IF; + END IF; + + -- Classify + IF score >= 80 THEN RETURN 'excellent'; + ELSIF score >= 60 THEN RETURN 'good'; + ELSIF score >= 40 THEN RETURN 'fair'; + ELSE RETURN 'poor'; + END IF; +END; +$$ LANGUAGE plpgsql STABLE STRICT PARALLEL SAFE; +COMMENT ON FUNCTION observing_night_quality(observer, timestamptz) IS + 'Composite observing quality assessment: excellent/good/fair/poor based on darkness duration and Moon interference.'; + +-- ============================================================ +-- Lunar libration (5) +-- ============================================================ + +CREATE FUNCTION moon_libration_longitude(timestamptz) RETURNS float8 + AS 'MODULE_PATHNAME', 'moon_libration_longitude' + LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE; +COMMENT ON FUNCTION moon_libration_longitude(timestamptz) IS + 'Optical libration in longitude (degrees, typically [-8, +8]). Meeus Ch. 53.'; + +CREATE FUNCTION moon_libration_latitude(timestamptz) RETURNS float8 + AS 'MODULE_PATHNAME', 'moon_libration_latitude' + LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE; +COMMENT ON FUNCTION moon_libration_latitude(timestamptz) IS + 'Optical libration in latitude (degrees, typically [-7, +7]). Meeus Ch. 53.'; + +CREATE FUNCTION moon_libration_position_angle(timestamptz) RETURNS float8 + AS 'MODULE_PATHNAME', 'moon_libration_position_angle' + LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE; +COMMENT ON FUNCTION moon_libration_position_angle(timestamptz) IS + 'Position angle of the Moon axis (degrees, [0, 360)). Meeus Ch. 53.'; + +CREATE FUNCTION moon_libration(timestamptz, + OUT l float8, OUT b float8, OUT p float8) RETURNS record + AS 'MODULE_PATHNAME', 'moon_libration' + LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE; +COMMENT ON FUNCTION moon_libration(timestamptz) IS + 'All three libration values: longitude (l), latitude (b), position angle (p) in degrees.'; + +CREATE FUNCTION moon_subsolar_longitude(timestamptz) RETURNS float8 + AS 'MODULE_PATHNAME', 'moon_subsolar_longitude' + LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE; +COMMENT ON FUNCTION moon_subsolar_longitude(timestamptz) IS + 'Selenographic longitude of the sub-solar point (degrees, [0, 360)). Determines the lunar terminator position.'; +-- pg_orrery 0.17.0 -> 0.18.0: Saturn ring tilt, penumbral eclipse, +-- rise/set event windows, angular separation rate + +-- ============================================================ +-- Saturn ring tilt (1) +-- ============================================================ + +CREATE FUNCTION saturn_ring_tilt(timestamptz) RETURNS float8 + AS 'MODULE_PATHNAME', 'saturn_ring_tilt' + LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE; +COMMENT ON FUNCTION saturn_ring_tilt(timestamptz) IS + 'Sub-observer latitude B'' of Earth relative to Saturn ring plane (degrees, [-27, +27]). Uses IAU 2000 pole direction.'; + +-- ============================================================ +-- Penumbral eclipse prediction (4) +-- ============================================================ + +CREATE FUNCTION satellite_in_penumbra(tle, timestamptz) RETURNS bool + AS 'MODULE_PATHNAME', 'satellite_in_penumbra' + LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE; +COMMENT ON FUNCTION satellite_in_penumbra(tle, timestamptz) IS + 'True if the satellite is in Earth penumbral shadow (partial sunlight) at the given time.'; + +CREATE FUNCTION satellite_shadow_state(tle, timestamptz) RETURNS text + AS 'MODULE_PATHNAME', 'satellite_shadow_state' + LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE; +COMMENT ON FUNCTION satellite_shadow_state(tle, timestamptz) IS + 'Shadow state of satellite: ''sunlit'', ''penumbra'', or ''umbra''. Uses conical shadow model.'; + +CREATE FUNCTION satellite_next_penumbra_entry(tle, timestamptz) RETURNS timestamptz + AS 'MODULE_PATHNAME', 'satellite_next_penumbra_entry' + LANGUAGE C STABLE STRICT PARALLEL SAFE; +COMMENT ON FUNCTION satellite_next_penumbra_entry(tle, timestamptz) IS + 'Next time the satellite enters Earth penumbral shadow (up to 7-day search). NULL if none found.'; + +CREATE FUNCTION satellite_next_penumbra_exit(tle, timestamptz) RETURNS timestamptz + AS 'MODULE_PATHNAME', 'satellite_next_penumbra_exit' + LANGUAGE C STABLE STRICT PARALLEL SAFE; +COMMENT ON FUNCTION satellite_next_penumbra_exit(tle, timestamptz) IS + 'Next time the satellite exits Earth penumbral shadow (up to 7-day search). NULL if none found.'; + +-- ============================================================ +-- Rise/set event windows (3 SRFs) +-- ============================================================ + +CREATE FUNCTION planet_rise_set_events( + body_id int4, observer, start timestamptz, stop timestamptz, + refracted bool DEFAULT false +) RETURNS TABLE(event_time timestamptz, event_type text) + AS 'MODULE_PATHNAME', 'planet_rise_set_events' + LANGUAGE C STABLE STRICT PARALLEL SAFE + ROWS 10; +COMMENT ON FUNCTION planet_rise_set_events(int4, observer, timestamptz, timestamptz, bool) IS + 'All rise and set events for a planet within a time window. Returns TABLE(event_time, event_type). Max 366-day window.'; + +CREATE FUNCTION sun_rise_set_events( + observer, start timestamptz, stop timestamptz, + refracted bool DEFAULT false +) RETURNS TABLE(event_time timestamptz, event_type text) + AS 'MODULE_PATHNAME', 'sun_rise_set_events' + LANGUAGE C STABLE STRICT PARALLEL SAFE + ROWS 10; +COMMENT ON FUNCTION sun_rise_set_events(observer, timestamptz, timestamptz, bool) IS + 'All rise and set events for the Sun within a time window. Returns TABLE(event_time, event_type). Max 366-day window.'; + +CREATE FUNCTION moon_rise_set_events( + observer, start timestamptz, stop timestamptz, + refracted bool DEFAULT false +) RETURNS TABLE(event_time timestamptz, event_type text) + AS 'MODULE_PATHNAME', 'moon_rise_set_events' + LANGUAGE C STABLE STRICT PARALLEL SAFE + ROWS 10; +COMMENT ON FUNCTION moon_rise_set_events(observer, timestamptz, timestamptz, bool) IS + 'All rise and set events for the Moon within a time window. Returns TABLE(event_time, event_type). Max 366-day window.'; + +-- ============================================================ +-- Angular separation rate (2) +-- ============================================================ + +CREATE FUNCTION eq_angular_rate( + equatorial, equatorial, equatorial, equatorial, float8 +) RETURNS float8 + AS 'MODULE_PATHNAME', 'eq_angular_rate' + LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE; +COMMENT ON FUNCTION eq_angular_rate(equatorial, equatorial, equatorial, equatorial, float8) IS + 'Rate of change of angular separation (deg/hr). Args: pos1_t0, pos2_t0, pos1_t1, pos2_t1, dt_seconds. Positive = separating, negative = approaching.'; + +CREATE FUNCTION planet_angular_rate(int4, int4, timestamptz) RETURNS float8 + AS 'MODULE_PATHNAME', 'planet_angular_rate' + LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE; +COMMENT ON FUNCTION planet_angular_rate(int4, int4, timestamptz) IS + 'Rate of angular separation change between two bodies (deg/hr). Body IDs: 0=Sun, 1-8=planets, 10=Moon. Uses 1-minute finite difference.'; diff --git a/src/eclipse_funcs.c b/src/eclipse_funcs.c index 89f3117..e6fdbde 100644 --- a/src/eclipse_funcs.c +++ b/src/eclipse_funcs.c @@ -2,13 +2,20 @@ * eclipse_funcs.c -- Satellite eclipse prediction * * Determines when a satellite enters/exits Earth's shadow using - * a cylindrical shadow model (Vallado, "Fundamentals of - * Astrodynamics", Section 5.3). + * a conical shadow model that accounts for the finite angular size + * of the Sun (Vallado, "Fundamentals of Astrodynamics", Section 5.3). * - * Earth casts a cylindrical shadow of radius R_Earth opposite the - * Sun direction. A satellite is eclipsed when its perpendicular - * distance from the shadow axis is within R_Earth AND it is on the - * far side of Earth from the Sun. + * The umbra cone converges behind Earth (full shadow): + * r_umbra(d) = R_earth - d * (R_sun - R_earth) / D_sun + * + * The penumbra cone diverges (partial shadow): + * r_penumbra(d) = R_earth + d * (R_sun + R_earth) / D_sun + * + * where d is the satellite's distance along the shadow axis. + * + * Existing cylindrical-model functions (satellite_is_eclipsed, etc.) + * now use the umbra cone boundary, which is more physically accurate. + * New functions expose the penumbra zone and tri-state shadow model. * * Sun direction computed via VSOP87 (ecliptic J2000 -> equatorial * J2000). TEME differs from J2000 by ~arcsec nutation residual, @@ -17,6 +24,7 @@ #include "postgres.h" #include "fmgr.h" +#include "utils/builtins.h" #include "utils/timestamp.h" #include "types.h" #include "astro_math.h" @@ -29,6 +37,10 @@ PG_FUNCTION_INFO_V1(satellite_is_eclipsed); PG_FUNCTION_INFO_V1(satellite_next_eclipse_entry); PG_FUNCTION_INFO_V1(satellite_next_eclipse_exit); PG_FUNCTION_INFO_V1(satellite_eclipse_fraction); +PG_FUNCTION_INFO_V1(satellite_in_penumbra); +PG_FUNCTION_INFO_V1(satellite_shadow_state); +PG_FUNCTION_INFO_V1(satellite_next_penumbra_entry); +PG_FUNCTION_INFO_V1(satellite_next_penumbra_exit); #define DEG_TO_RAD_EC (M_PI / 180.0) #define RAD_TO_DEG_EC (180.0 / M_PI) @@ -37,6 +49,13 @@ PG_FUNCTION_INFO_V1(satellite_eclipse_fraction); #define ECLIPSE_BISECT_TOL_JD (0.5 / 86400.0) /* 0.5 second */ #define ECLIPSE_SEARCH_DAYS 7.0 +/* Shadow state: sunlit (no shadow), penumbra (partial), umbra (full) */ +typedef enum { + SHADOW_SUNLIT = 0, + SHADOW_PENUMBRA = 1, + SHADOW_UMBRA = 2 +} shadow_state_t; + /* ---------------------------------------------------------------- * Static helpers -- duplicated from pass_funcs.c per project @@ -100,29 +119,27 @@ do_propagate_ec(const pg_tle *tle, double jd, double *pos, double *vel) /* - * Compute unit vector from Earth to Sun in equatorial J2000. + * Compute unit Sun direction AND Sun distance from Earth center. * * Uses VSOP87 Earth position (ecliptic J2000), negates to get - * geocentric Sun, rotates to equatorial. Returns unit vector. + * geocentric Sun, rotates to equatorial. Returns unit direction + * vector and distance in km. */ static void -sun_direction_equ(double jd, double sun_dir[3]) +sun_direction_and_distance(double jd, double sun_dir[3], double *sun_dist_km) { double earth_xyz[6]; double sun_ecl[3], sun_equ[3]; double r; - GetVsop87Coor(jd, 2, earth_xyz); /* VSOP87 body 2 = Earth */ + GetVsop87Coor(jd, 2, earth_xyz); - /* Geocentric Sun = -Earth heliocentric */ sun_ecl[0] = -earth_xyz[0]; sun_ecl[1] = -earth_xyz[1]; sun_ecl[2] = -earth_xyz[2]; - /* Ecliptic J2000 -> equatorial J2000 */ ecliptic_to_equatorial(sun_ecl, sun_equ); - /* Normalize to unit vector */ r = sqrt(sun_equ[0] * sun_equ[0] + sun_equ[1] * sun_equ[1] + sun_equ[2] * sun_equ[2]); @@ -130,33 +147,50 @@ sun_direction_equ(double jd, double sun_dir[3]) sun_dir[0] = sun_equ[0] / r; sun_dir[1] = sun_equ[1] / r; sun_dir[2] = sun_equ[2] / r; + + *sun_dist_km = r * AU_KM; } /* - * is_satellite_eclipsed_pos -- cylindrical shadow test + * satellite_shadow_state_pos -- cone shadow model * - * sat_pos[3]: satellite position relative to Earth center (km, TEME/J2000) - * sun_dir[3]: unit vector from Earth toward Sun (J2000 equatorial) + * Determines whether a satellite is in sunlight, penumbra, or umbra + * using a conical shadow model that accounts for the finite angular + * size of the Sun. * - * Eclipsed when: - * 1. sat dot sun_dir < 0 (satellite on shadow side of Earth) - * 2. perpendicular distance from shadow axis < R_Earth + * The umbra cone converges behind Earth (full shadow, smaller radius + * with distance). The penumbra cone diverges (partial shadow, larger + * radius with distance). + * + * r_umbra(d) = R_earth - d * (R_sun - R_earth) / D_sun + * r_penumbra(d) = R_earth + d * (R_sun + R_earth) / D_sun + * + * where d is the satellite's distance along the shadow axis + * (negative of projection onto Sun direction). */ -static bool -is_satellite_eclipsed_pos(const double sat_pos[3], const double sun_dir[3]) +static shadow_state_t +satellite_shadow_state_pos(const double sat_pos[3], + const double sun_dir[3], + double sun_dist_km) { double proj, perp[3], perp_dist; + double d; /* distance along shadow axis behind Earth */ + double r_umbra, r_penumbra; /* Project satellite position onto Sun direction */ proj = sat_pos[0] * sun_dir[0] + sat_pos[1] * sun_dir[1] + sat_pos[2] * sun_dir[2]; + /* Satellite on Sun side of Earth = sunlit */ if (proj > 0.0) - return false; /* sunlit side of Earth */ + return SHADOW_SUNLIT; - /* Perpendicular vector from shadow axis */ + /* Distance behind Earth along shadow axis */ + d = -proj; + + /* Perpendicular distance from shadow axis */ perp[0] = sat_pos[0] - proj * sun_dir[0]; perp[1] = sat_pos[1] - proj * sun_dir[1]; perp[2] = sat_pos[2] - proj * sun_dir[2]; @@ -164,30 +198,55 @@ is_satellite_eclipsed_pos(const double sat_pos[3], const double sun_dir[3]) perp[1] * perp[1] + perp[2] * perp[2]); - return (perp_dist < WGS84_A); /* 6378.137 km */ + /* Cone radii at satellite distance */ + r_umbra = WGS84_A - d * (SUN_RADIUS_KM - WGS84_A) / sun_dist_km; + r_penumbra = WGS84_A + d * (SUN_RADIUS_KM + WGS84_A) / sun_dist_km; + + /* Umbra cone may converge to zero -- if r_umbra < 0, satellite is + * beyond the umbral cone vertex (only penumbra possible) */ + if (r_umbra > 0.0 && perp_dist < r_umbra) + return SHADOW_UMBRA; + + if (perp_dist < r_penumbra) + return SHADOW_PENUMBRA; + + return SHADOW_SUNLIT; +} + + +/* + * Compute cone shadow state at a single time. + * Returns SHADOW_SUNLIT on propagation error (conservative). + */ +static shadow_state_t +shadow_state_at_jd(const pg_tle *tle, double jd) +{ + double pos[3], vel[3]; + double sun_dir[3]; + double sun_dist_km; + int err; + + err = do_propagate_ec(tle, jd, pos, vel); + if (err != 0) + return SHADOW_SUNLIT; + + sun_direction_and_distance(jd, sun_dir, &sun_dist_km); + + return satellite_shadow_state_pos(pos, sun_dir, sun_dist_km); } /* * eclipse_state_at_jd -- compute eclipse state at a single time * - * Returns true if eclipsed, false if sunlit. + * Returns true if in umbra, false if sunlit or penumbra. + * Uses cone model internally (backward compatible with cylinder callers). * Returns false on propagation error (conservative: assume sunlit). */ static bool eclipse_state_at_jd(const pg_tle *tle, double jd) { - double pos[3], vel[3]; - double sun_dir[3]; - int err; - - err = do_propagate_ec(tle, jd, pos, vel); - if (err != 0) - return false; /* propagation failed, assume sunlit */ - - sun_direction_equ(jd, sun_dir); - - return is_satellite_eclipsed_pos(pos, sun_dir); + return (shadow_state_at_jd(tle, jd) == SHADOW_UMBRA); } @@ -195,7 +254,7 @@ eclipse_state_at_jd(const pg_tle *tle, double jd) * satellite_is_eclipsed(tle, timestamptz) -> bool * * Point-in-time eclipse test. Returns true if the satellite is - * in Earth's cylindrical shadow at the given time. + * in Earth's umbral shadow (cone model) at the given time. * ================================================================ */ Datum @@ -360,3 +419,163 @@ satellite_eclipse_fraction(PG_FUNCTION_ARGS) PG_RETURN_FLOAT8((double) eclipsed_samples / (double) total_samples); } + + +/* ================================================================ + * satellite_in_penumbra(tle, timestamptz) -> bool + * + * Returns true if the satellite is in Earth's penumbral zone + * (partial shadow) at the given time. False if sunlit or in + * full umbra. + * ================================================================ + */ +Datum +satellite_in_penumbra(PG_FUNCTION_ARGS) +{ + pg_tle *tle = (pg_tle *) PG_GETARG_POINTER(0); + int64 ts = PG_GETARG_INT64(1); + double jd; + + jd = timestamptz_to_jd(ts); + + PG_RETURN_BOOL(shadow_state_at_jd(tle, jd) == SHADOW_PENUMBRA); +} + + +/* ================================================================ + * satellite_shadow_state(tle, timestamptz) -> text + * + * Returns 'sunlit', 'penumbra', or 'umbra' indicating the + * satellite's shadow state at the given time. + * ================================================================ + */ +Datum +satellite_shadow_state(PG_FUNCTION_ARGS) +{ + pg_tle *tle = (pg_tle *) PG_GETARG_POINTER(0); + int64 ts = PG_GETARG_INT64(1); + double jd; + shadow_state_t state; + const char *label; + + jd = timestamptz_to_jd(ts); + state = shadow_state_at_jd(tle, jd); + + switch (state) + { + case SHADOW_PENUMBRA: label = "penumbra"; break; + case SHADOW_UMBRA: label = "umbra"; break; + default: label = "sunlit"; break; + } + + PG_RETURN_TEXT_P(cstring_to_text(label)); +} + + +/* ================================================================ + * satellite_next_penumbra_entry(tle, timestamptz) -> timestamptz + * + * Scans forward to find when the satellite next enters the + * penumbral zone (transition from sunlit to penumbra). + * Searches up to 7 days. Returns NULL if no entry found. + * ================================================================ + */ +Datum +satellite_next_penumbra_entry(PG_FUNCTION_ARGS) +{ + pg_tle *tle = (pg_tle *) PG_GETARG_POINTER(0); + int64 ts = PG_GETARG_INT64(1); + double jd, stop_jd; + shadow_state_t prev_state, curr_state; + double lo, hi, mid; + + jd = timestamptz_to_jd(ts); + stop_jd = jd + ECLIPSE_SEARCH_DAYS; + + prev_state = shadow_state_at_jd(tle, jd); + + while (jd < stop_jd) + { + jd += ECLIPSE_SCAN_STEP_JD; + if (jd > stop_jd) + jd = stop_jd; + + curr_state = shadow_state_at_jd(tle, jd); + + /* Transition from sunlit to any shadow (penumbra or umbra) */ + if (prev_state == SHADOW_SUNLIT && curr_state != SHADOW_SUNLIT) + { + lo = jd - ECLIPSE_SCAN_STEP_JD; + hi = jd; + while (hi - lo > ECLIPSE_BISECT_TOL_JD) + { + mid = (lo + hi) / 2.0; + if (shadow_state_at_jd(tle, mid) != SHADOW_SUNLIT) + hi = mid; + else + lo = mid; + } + + PG_RETURN_TIMESTAMPTZ(jd_to_timestamptz((lo + hi) / 2.0)); + } + + prev_state = curr_state; + } + + PG_RETURN_NULL(); +} + + +/* ================================================================ + * satellite_next_penumbra_exit(tle, timestamptz) -> timestamptz + * + * Scans forward to find when the satellite next exits the + * penumbral zone (transition from penumbra to sunlit). + * This is the moment the satellite fully emerges from Earth's shadow. + * Searches up to 7 days. Returns NULL if no exit found. + * ================================================================ + */ +Datum +satellite_next_penumbra_exit(PG_FUNCTION_ARGS) +{ + pg_tle *tle = (pg_tle *) PG_GETARG_POINTER(0); + int64 ts = PG_GETARG_INT64(1); + double jd, stop_jd; + shadow_state_t prev_state, curr_state; + double lo, hi, mid; + + jd = timestamptz_to_jd(ts); + stop_jd = jd + ECLIPSE_SEARCH_DAYS; + + prev_state = shadow_state_at_jd(tle, jd); + + while (jd < stop_jd) + { + jd += ECLIPSE_SCAN_STEP_JD; + if (jd > stop_jd) + jd = stop_jd; + + curr_state = shadow_state_at_jd(tle, jd); + + /* Transition from any shadow to sunlit */ + if (prev_state != SHADOW_SUNLIT && curr_state == SHADOW_SUNLIT) + { + lo = jd - ECLIPSE_SCAN_STEP_JD; + hi = jd; + while (hi - lo > ECLIPSE_BISECT_TOL_JD) + { + mid = (lo + hi) / 2.0; + if (shadow_state_at_jd(tle, mid) != SHADOW_SUNLIT) + lo = mid; + else + hi = mid; + } + + PG_RETURN_TIMESTAMPTZ(jd_to_timestamptz((lo + hi) / 2.0)); + } + + prev_state = curr_state; + } + + PG_RETURN_NULL(); +} diff --git a/src/equatorial_funcs.c b/src/equatorial_funcs.c index 720c15e..585f1e9 100644 --- a/src/equatorial_funcs.c +++ b/src/equatorial_funcs.c @@ -53,6 +53,10 @@ PG_FUNCTION_INFO_V1(make_equatorial); PG_FUNCTION_INFO_V1(eq_angular_distance); PG_FUNCTION_INFO_V1(eq_within_cone); +/* Angular separation rate */ +PG_FUNCTION_INFO_V1(eq_angular_rate); +PG_FUNCTION_INFO_V1(planet_angular_rate); + /* ---------------------------------------------------------------- * Static helper -- observer geodetic to ECEF. @@ -412,6 +416,40 @@ make_equatorial(PG_FUNCTION_ARGS) } +/* + * Vincenty formula for angular separation between two spherical positions. + * + * Takes RA and Dec in radians, returns separation in degrees. + * Numerically stable at all separations (0, 180, and everything between). + * + * Extracted from eq_angular_distance() for reuse by angular rate functions. + */ +static double +vincenty_separation_deg(double ra1_rad, double dec1_rad, + double ra2_rad, double dec2_rad) +{ + double d_ra, cos_d_ra, sin_d_ra; + double sin_d1, cos_d1, sin_d2, cos_d2; + double num1, num2, num, den; + + d_ra = ra2_rad - ra1_rad; + cos_d_ra = cos(d_ra); + sin_d_ra = sin(d_ra); + + sin_d1 = sin(dec1_rad); + cos_d1 = cos(dec1_rad); + sin_d2 = sin(dec2_rad); + cos_d2 = cos(dec2_rad); + + num1 = cos_d2 * sin_d_ra; + num2 = cos_d1 * sin_d2 - sin_d1 * cos_d2 * cos_d_ra; + num = sqrt(num1 * num1 + num2 * num2); + den = sin_d1 * sin_d2 + cos_d1 * cos_d2 * cos_d_ra; + + return atan2(num, den) * RAD_TO_DEG; +} + + /* ================================================================ * eq_angular_distance(equatorial, equatorial) -> float8 * @@ -429,25 +467,8 @@ eq_angular_distance(PG_FUNCTION_ARGS) { pg_equatorial *a = (pg_equatorial *) PG_GETARG_POINTER(0); pg_equatorial *b = (pg_equatorial *) PG_GETARG_POINTER(1); - double d_ra, cos_d_ra, sin_d_ra; - double sin_d1, cos_d1, sin_d2, cos_d2; - double num1, num2, num, den; - d_ra = b->ra - a->ra; - cos_d_ra = cos(d_ra); - sin_d_ra = sin(d_ra); - - sin_d1 = sin(a->dec); - cos_d1 = cos(a->dec); - sin_d2 = sin(b->dec); - cos_d2 = cos(b->dec); - - num1 = cos_d2 * sin_d_ra; - num2 = cos_d1 * sin_d2 - sin_d1 * cos_d2 * cos_d_ra; - num = sqrt(num1 * num1 + num2 * num2); - den = sin_d1 * sin_d2 + cos_d1 * cos_d2 * cos_d_ra; - - PG_RETURN_FLOAT8(atan2(num, den) * RAD_TO_DEG); + PG_RETURN_FLOAT8(vincenty_separation_deg(a->ra, a->dec, b->ra, b->dec)); } @@ -478,3 +499,180 @@ eq_within_cone(PG_FUNCTION_ARGS) PG_RETURN_BOOL(cos_sep >= cos_r); } + + +/* ================================================================ + * eq_angular_rate(eq1, eq2, eq1_later, eq2_later, dt_seconds) -> float8 + * + * Rate of change of angular separation between two objects, + * in degrees per hour. + * + * eq1, eq2: positions of the two objects at time t + * eq1_later, eq2_later: positions at time t + dt_seconds + * dt_seconds: time step in seconds (must be > 0) + * + * Positive = separating, negative = approaching. + * Uses Vincenty formula for both separations. + * ================================================================ + */ +Datum +eq_angular_rate(PG_FUNCTION_ARGS) +{ + pg_equatorial *eq1 = (pg_equatorial *) PG_GETARG_POINTER(0); + pg_equatorial *eq2 = (pg_equatorial *) PG_GETARG_POINTER(1); + pg_equatorial *eq1_later = (pg_equatorial *) PG_GETARG_POINTER(2); + pg_equatorial *eq2_later = (pg_equatorial *) PG_GETARG_POINTER(3); + double dt_sec = PG_GETARG_FLOAT8(4); + double d1, d2, rate; + + if (dt_sec <= 0.0) + ereport(ERROR, + (errcode(ERRCODE_INVALID_PARAMETER_VALUE), + errmsg("eq_angular_rate: dt_seconds must be positive"))); + + d1 = vincenty_separation_deg(eq1->ra, eq1->dec, eq2->ra, eq2->dec); + d2 = vincenty_separation_deg(eq1_later->ra, eq1_later->dec, + eq2_later->ra, eq2_later->dec); + + /* degrees per hour */ + rate = (d2 - d1) / (dt_sec / 3600.0); + + PG_RETURN_FLOAT8(rate); +} + + +/* ================================================================ + * planet_angular_rate(body_id1, body_id2, timestamptz) -> float8 + * + * Rate of change of angular separation between two solar system + * bodies as seen from Earth, in degrees per hour. + * + * Uses 1-minute finite difference (planets move slowly enough that + * this gives sub-arcsecond accuracy; even the Moon at ~0.5 deg/hr + * displaces only ~0.008 deg per minute, well within linear regime). + * + * Body IDs: 0=Sun, 1-8=Mercury-Neptune, 10=Moon. + * Error if both body IDs are the same. + * + * Positive = separating, negative = approaching. + * ================================================================ + */ +Datum +planet_angular_rate(PG_FUNCTION_ARGS) +{ + int32 body_id1 = PG_GETARG_INT32(0); + int32 body_id2 = PG_GETARG_INT32(1); + int64 ts = PG_GETARG_INT64(2); + double jd, jd_later; + double earth1[6], earth2[6]; + double target1_1[6], target1_2[6]; + double target2_1[6], target2_2[6]; + double geo1_1[3], geo1_2[3], geo2_1[3], geo2_2[3]; + double ra1_1, dec1_1, dist1_1; + double ra1_2, dec1_2, dist1_2; + double ra2_1, dec2_1, dist2_1; + double ra2_2, dec2_2, dist2_2; + double equ1[3], equ2[3]; + double d1, d2, rate; + + /* 1-minute finite difference step */ + #define RATE_DT_JD (60.0 / 86400.0) + + if (body_id1 == body_id2) + ereport(ERROR, + (errcode(ERRCODE_INVALID_PARAMETER_VALUE), + errmsg("planet_angular_rate: body IDs must be different"))); + + jd = timestamptz_to_jd(ts); + jd_later = jd + RATE_DT_JD; + + /* Get Earth position at both times */ + GetVsop87Coor(jd, 2, earth1); + GetVsop87Coor(jd_later, 2, earth2); + + /* Compute geocentric ecliptic positions for body 1 at both times */ + if (body_id1 == BODY_SUN) + { + geo1_1[0] = -earth1[0]; geo1_1[1] = -earth1[1]; geo1_1[2] = -earth1[2]; + geo1_2[0] = -earth2[0]; geo1_2[1] = -earth2[1]; geo1_2[2] = -earth2[2]; + } + else if (body_id1 == BODY_MOON) + { + double moon_ecl[3]; + GetElp82bCoor(jd, moon_ecl); + geo1_1[0] = moon_ecl[0]; geo1_1[1] = moon_ecl[1]; geo1_1[2] = moon_ecl[2]; + GetElp82bCoor(jd_later, moon_ecl); + geo1_2[0] = moon_ecl[0]; geo1_2[1] = moon_ecl[1]; geo1_2[2] = moon_ecl[2]; + } + else if (body_id1 >= BODY_MERCURY && body_id1 <= BODY_NEPTUNE && body_id1 != BODY_EARTH) + { + int vsop1 = body_id1 - 1; + GetVsop87Coor(jd, vsop1, target1_1); + GetVsop87Coor(jd_later, vsop1, target1_2); + geo1_1[0] = target1_1[0] - earth1[0]; + geo1_1[1] = target1_1[1] - earth1[1]; + geo1_1[2] = target1_1[2] - earth1[2]; + geo1_2[0] = target1_2[0] - earth2[0]; + geo1_2[1] = target1_2[1] - earth2[1]; + geo1_2[2] = target1_2[2] - earth2[2]; + } + else + ereport(ERROR, + (errcode(ERRCODE_NUMERIC_VALUE_OUT_OF_RANGE), + errmsg("planet_angular_rate: body_id1 %d invalid (0=Sun,1-8=planets,10=Moon)", + body_id1))); + + /* Same for body 2 */ + if (body_id2 == BODY_SUN) + { + geo2_1[0] = -earth1[0]; geo2_1[1] = -earth1[1]; geo2_1[2] = -earth1[2]; + geo2_2[0] = -earth2[0]; geo2_2[1] = -earth2[1]; geo2_2[2] = -earth2[2]; + } + else if (body_id2 == BODY_MOON) + { + double moon_ecl[3]; + GetElp82bCoor(jd, moon_ecl); + geo2_1[0] = moon_ecl[0]; geo2_1[1] = moon_ecl[1]; geo2_1[2] = moon_ecl[2]; + GetElp82bCoor(jd_later, moon_ecl); + geo2_2[0] = moon_ecl[0]; geo2_2[1] = moon_ecl[1]; geo2_2[2] = moon_ecl[2]; + } + else if (body_id2 >= BODY_MERCURY && body_id2 <= BODY_NEPTUNE && body_id2 != BODY_EARTH) + { + int vsop2 = body_id2 - 1; + GetVsop87Coor(jd, vsop2, target2_1); + GetVsop87Coor(jd_later, vsop2, target2_2); + geo2_1[0] = target2_1[0] - earth1[0]; + geo2_1[1] = target2_1[1] - earth1[1]; + geo2_1[2] = target2_1[2] - earth1[2]; + geo2_2[0] = target2_2[0] - earth2[0]; + geo2_2[1] = target2_2[1] - earth2[1]; + geo2_2[2] = target2_2[2] - earth2[2]; + } + else + ereport(ERROR, + (errcode(ERRCODE_NUMERIC_VALUE_OUT_OF_RANGE), + errmsg("planet_angular_rate: body_id2 %d invalid (0=Sun,1-8=planets,10=Moon)", + body_id2))); + + /* Convert geocentric ecliptic to equatorial, get RA/Dec */ + ecliptic_to_equatorial(geo1_1, equ1); + cartesian_to_spherical(equ1, &ra1_1, &dec1_1, &dist1_1); + + ecliptic_to_equatorial(geo1_2, equ2); + cartesian_to_spherical(equ2, &ra1_2, &dec1_2, &dist1_2); + + ecliptic_to_equatorial(geo2_1, equ1); + cartesian_to_spherical(equ1, &ra2_1, &dec2_1, &dist2_1); + + ecliptic_to_equatorial(geo2_2, equ2); + cartesian_to_spherical(equ2, &ra2_2, &dec2_2, &dist2_2); + + /* Angular separation at both times */ + d1 = vincenty_separation_deg(ra1_1, dec1_1, ra2_1, dec2_1); + d2 = vincenty_separation_deg(ra1_2, dec1_2, ra2_2, dec2_2); + + /* Rate in degrees per hour (dt = 60 seconds = 1/60 hour) */ + rate = (d2 - d1) / (60.0 / 3600.0); + + PG_RETURN_FLOAT8(rate); +} diff --git a/src/magnitude_funcs.c b/src/magnitude_funcs.c index 2890471..7613fa0 100644 --- a/src/magnitude_funcs.c +++ b/src/magnitude_funcs.c @@ -22,6 +22,7 @@ PG_FUNCTION_INFO_V1(planet_magnitude); PG_FUNCTION_INFO_V1(solar_elongation); PG_FUNCTION_INFO_V1(planet_phase); +PG_FUNCTION_INFO_V1(saturn_ring_tilt); /* @@ -32,9 +33,8 @@ PG_FUNCTION_INFO_V1(planet_phase); * small vs large phase angles. Jupiter is piecewise at 12 deg. * Saturn, Uranus, Neptune use simpler models. * - * Saturn caveat: ring tilt contribution (their Eq. 10) requires - * saturnicentric sub-observer latitude, which we don't compute. - * We use the globe-only model (Eq. 11/12) — error up to ~1.5 mag. + * Saturn: globe model (Eq. 11/12) plus ring tilt correction (Eq. 10) + * using IAU 2000 Saturn pole direction for sub-observer latitude B'. */ static double @@ -81,7 +81,7 @@ phase_correction(int body_id, double i) - 1.876 * a * a * a * a * a); } - case 6: /* Saturn: globe-only (Eq. 11), no ring tilt */ + case 6: /* Saturn: globe phase (Eq. 11/12), ring tilt added in planet_magnitude() */ if (i <= 6.5) return -3.7e-04 * i + 6.16e-04 * i2; else @@ -115,7 +115,7 @@ static const double planet_v10[] = { [3] = 0.0, /* Earth: unused */ [4] = -1.601, /* Mars (i <= 50; piecewise shifts in phase_correction) */ [5] = -9.395, /* Jupiter (i <= 12; piecewise shifts in phase_correction) */ - [6] = -8.95, /* Saturn (globe-only) */ + [6] = -8.95, /* Saturn (globe + ring) */ [7] = -7.110, /* Uranus */ [8] = -7.00, /* Neptune */ }; @@ -134,6 +134,7 @@ typedef struct double delta; /* Earth-Planet distance (AU) */ double R; /* Sun-Earth distance (AU) */ double i_deg; /* Phase angle, degrees (Sun-Planet-Earth vertex) */ + double gv[3]; /* geocentric ecliptic J2000 (AU) — for Saturn ring tilt */ } planet_geometry; static void @@ -157,6 +158,9 @@ compute_planet_geometry(int body_id, double jd, planet_geometry *geo) gv[1] = planet_xyz[1] - earth_xyz[1]; gv[2] = planet_xyz[2] - earth_xyz[2]; geo->delta = sqrt(gv[0] * gv[0] + gv[1] * gv[1] + gv[2] * gv[2]); + geo->gv[0] = gv[0]; + geo->gv[1] = gv[1]; + geo->gv[2] = gv[2]; /* Sun-Earth distance */ geo->R = sqrt(earth_xyz[0] * earth_xyz[0] + @@ -172,6 +176,54 @@ compute_planet_geometry(int body_id, double jd, planet_geometry *geo) } +/* + * Saturn pole direction in ecliptic J2000. + * + * IAU 2000 pole: RA0 = 40.589 deg, Dec0 = 83.537 deg (equatorial J2000). + * Converted to ecliptic J2000 via rotation by obliquity. + * + * ecl_x = cos(dec)*cos(ra) + * ecl_y = cos(dec)*sin(ra)*cos(eps) + sin(dec)*sin(eps) + * ecl_z = -cos(dec)*sin(ra)*sin(eps) + sin(dec)*cos(eps) + * + * Pre-computed unit vector (constant across timescales relevant here). + */ +static const double saturn_pole_ecl[3] = { + 0.08547883, /* x: cos(83.537)*cos(40.589) */ + 0.46244181, /* y: cos(83.537)*sin(40.589)*cos(23.4393) + sin(83.537)*sin(23.4393) */ + 0.88251965 /* z: -cos(83.537)*sin(40.589)*sin(23.4393) + sin(83.537)*cos(23.4393) */ +}; + +/* + * Compute sub-observer latitude of Earth relative to Saturn's ring plane. + * + * B' = arcsin(dot(geocentric_unit_vector, saturn_pole_ecl)) + * + * When |B'| is large, rings are maximally tilted toward Earth (brighter). + * When B' ~ 0, rings are edge-on (dimmest, nearly invisible). + * Range: [-27, +27] deg (Saturn's axial tilt is 26.73 deg). + */ +static double +compute_ring_tilt(const double gv[3], double delta) +{ + double gv_unit[3]; + double dot; + + gv_unit[0] = gv[0] / delta; + gv_unit[1] = gv[1] / delta; + gv_unit[2] = gv[2] / delta; + + dot = gv_unit[0] * saturn_pole_ecl[0] + + gv_unit[1] * saturn_pole_ecl[1] + + gv_unit[2] * saturn_pole_ecl[2]; + + if (dot > 1.0) dot = 1.0; + if (dot < -1.0) dot = -1.0; + + return asin(dot); /* radians */ +} + + /* * Validate planet body_id for magnitude/elongation/phase. * Must be 1-8 (Mercury-Neptune), not 3 (Earth). @@ -201,9 +253,8 @@ validate_planet_body_id(int body_id, const char *func_name) * * Body IDs: 1=Mercury, ..., 8=Neptune (not Sun 0, Earth 3, or Moon 10) * - * NOTE: Saturn magnitude does not account for ring tilt, which - * can vary the apparent magnitude by ~1.5 mag. The returned value - * is approximate for Saturn. + * Saturn includes ring tilt correction (Eq. 10) using the IAU 2000 + * pole direction and VSOP87 geometry. * ================================================================ */ Datum @@ -224,6 +275,15 @@ planet_magnitude(PG_FUNCTION_ARGS) + 5.0 * log10(geo.r * geo.delta) + phase_correction(body_id, geo.i_deg); + /* Saturn ring tilt correction -- Mallama & Hilton (2018) Eq. 10 */ + if (body_id == BODY_SATURN) + { + double Bp = compute_ring_tilt(geo.gv, geo.delta); + double sin_Bp = fabs(sin(Bp)); + double sin2_Bp = sin(Bp) * sin(Bp); + V += -2.60 * sin_Bp + 1.25 * sin2_Bp; + } + PG_RETURN_FLOAT8(V); } @@ -296,3 +356,30 @@ planet_phase(PG_FUNCTION_ARGS) PG_RETURN_FLOAT8(k); } + + +/* ================================================================ + * saturn_ring_tilt(timestamptz) -> float8 + * + * Sub-observer latitude of Earth relative to Saturn's ring plane, + * in degrees [-27, +27]. Indicates how much the rings are tilted + * toward Earth at the given time. + * + * Near 0: rings edge-on (ring crossing events, e.g. 2025 March). + * Near +/-27: rings maximally open (brightest configuration). + * + * Uses IAU 2000 Saturn pole and VSOP87 Earth-Saturn geometry. + * ================================================================ + */ +Datum +saturn_ring_tilt(PG_FUNCTION_ARGS) +{ + int64 ts = PG_GETARG_INT64(0); + double jd; + planet_geometry geo; + + jd = timestamptz_to_jd(ts); + compute_planet_geometry(BODY_SATURN, jd, &geo); + + PG_RETURN_FLOAT8(compute_ring_tilt(geo.gv, geo.delta) * RAD_TO_DEG); +} diff --git a/src/rise_set_funcs.c b/src/rise_set_funcs.c index e41d4bd..ab34003 100644 --- a/src/rise_set_funcs.c +++ b/src/rise_set_funcs.c @@ -15,6 +15,9 @@ #include "postgres.h" #include "fmgr.h" +#include "funcapi.h" +#include "access/htup_details.h" +#include "catalog/pg_type.h" #include "utils/timestamp.h" #include "utils/builtins.h" #include "types.h" @@ -44,10 +47,14 @@ PG_FUNCTION_INFO_V1(sun_nautical_dawn); PG_FUNCTION_INFO_V1(sun_nautical_dusk); PG_FUNCTION_INFO_V1(sun_astronomical_dawn); PG_FUNCTION_INFO_V1(sun_astronomical_dusk); +PG_FUNCTION_INFO_V1(planet_rise_set_events); +PG_FUNCTION_INFO_V1(sun_rise_set_events); +PG_FUNCTION_INFO_V1(moon_rise_set_events); #define COARSE_STEP_JD (60.0 / 86400.0) /* 60 seconds */ #define BISECT_TOL_JD (0.1 / 86400.0) /* 0.1 second */ #define DEFAULT_WINDOW_DAYS 7.0 +#define MAX_WINDOW_DAYS 366.0 /* body_type encoding for the elevation helper */ #define BTYPE_PLANET 0 @@ -869,3 +876,199 @@ sun_astronomical_dusk(PG_FUNCTION_ARGS) PG_RETURN_TIMESTAMPTZ(jd_to_timestamptz(result_jd)); } + + +/* ================================================================ + * Rise/set event window SRFs + * + * Returns a stream of (event_time timestamptz, event_type text) rows + * for rise and set events within a time window. Follows the + * predict_passes() SRF pattern from pass_funcs.c. + * ================================================================ + */ + +typedef struct +{ + int body_type; /* BTYPE_PLANET, BTYPE_SUN, BTYPE_MOON */ + int body_id; + pg_observer obs; + double current_jd; + double stop_jd; + double threshold_rad; + bool looking_for_rise; +} rise_set_events_ctx; + +/* + * Shared SRF implementation for all body types. + * The first call initializes context; subsequent calls find events. + */ +static Datum +rise_set_events_internal(PG_FUNCTION_ARGS, int body_type, int body_id_arg_idx) +{ + FuncCallContext *funcctx; + rise_set_events_ctx *ctx; + + if (SRF_IS_FIRSTCALL()) + { + MemoryContext oldctx; + TupleDesc tupdesc; + pg_observer *obs; + int64 start_ts, stop_ts; + bool refracted; + double start_jd, stop_jd; + double threshold; + double init_el; + int body_id = 0; + + funcctx = SRF_FIRSTCALL_INIT(); + oldctx = MemoryContextSwitchTo(funcctx->multi_call_memory_ctx); + + /* Parse arguments based on body type */ + if (body_type == BTYPE_PLANET) + { + body_id = PG_GETARG_INT32(0); + obs = (pg_observer *) PG_GETARG_POINTER(1); + start_ts = PG_GETARG_INT64(2); + stop_ts = PG_GETARG_INT64(3); + refracted = (PG_NARGS() > 4 && !PG_ARGISNULL(4)) + ? PG_GETARG_BOOL(4) : false; + + if (body_id < BODY_MERCURY || body_id > BODY_NEPTUNE) + ereport(ERROR, + (errcode(ERRCODE_NUMERIC_VALUE_OUT_OF_RANGE), + errmsg("planet_rise_set_events: body_id %d must be 1-8", + body_id))); + if (body_id == BODY_EARTH) + ereport(ERROR, + (errcode(ERRCODE_FEATURE_NOT_SUPPORTED), + errmsg("cannot observe Earth from Earth"))); + } + else + { + obs = (pg_observer *) PG_GETARG_POINTER(0); + start_ts = PG_GETARG_INT64(1); + stop_ts = PG_GETARG_INT64(2); + refracted = (PG_NARGS() > 3 && !PG_ARGISNULL(3)) + ? PG_GETARG_BOOL(3) : false; + } + + start_jd = timestamptz_to_jd(start_ts); + stop_jd = timestamptz_to_jd(stop_ts); + + if (stop_jd <= start_jd) + ereport(ERROR, + (errcode(ERRCODE_INVALID_PARAMETER_VALUE), + errmsg("stop time must be after start time"))); + + if (stop_jd - start_jd > MAX_WINDOW_DAYS) + ereport(ERROR, + (errcode(ERRCODE_INVALID_PARAMETER_VALUE), + errmsg("window exceeds 366-day maximum"))); + + /* Determine threshold based on refraction and body type */ + if (refracted) + { + if (body_type == BTYPE_PLANET) + threshold = REFRACTION_ONLY_HORIZON_RAD; + else + threshold = SUN_MOON_REFRACTED_HORIZON_RAD; + } + else + threshold = 0.0; + + /* Build output tuple descriptor */ + if (get_call_result_type(fcinfo, NULL, &tupdesc) != TYPEFUNC_COMPOSITE) + ereport(ERROR, + (errcode(ERRCODE_FEATURE_NOT_SUPPORTED), + errmsg("function returning record called in context that cannot accept type record"))); + funcctx->tuple_desc = BlessTupleDesc(tupdesc); + + /* Allocate context */ + ctx = (rise_set_events_ctx *) + palloc0(sizeof(rise_set_events_ctx)); + + ctx->body_type = body_type; + ctx->body_id = body_id; + memcpy(&ctx->obs, obs, sizeof(pg_observer)); + ctx->current_jd = start_jd; + ctx->stop_jd = stop_jd; + ctx->threshold_rad = threshold; + + /* Determine initial state: is body above or below threshold? */ + init_el = elevation_at_jd_body(body_type, body_id, &ctx->obs, start_jd); + ctx->looking_for_rise = (init_el <= threshold); + + funcctx->user_fctx = ctx; + + MemoryContextSwitchTo(oldctx); + } + + funcctx = SRF_PERCALL_SETUP(); + ctx = (rise_set_events_ctx *) funcctx->user_fctx; + + /* Find next event */ + { + double event_jd; + Datum values[2]; + bool nulls[2] = {false, false}; + HeapTuple tuple; + + event_jd = find_next_crossing(ctx->body_type, ctx->body_id, + &ctx->obs, + ctx->current_jd, ctx->stop_jd, + ctx->threshold_rad, + ctx->looking_for_rise); + + if (event_jd < 0.0) + SRF_RETURN_DONE(funcctx); + + /* Build result tuple */ + values[0] = Int64GetDatum(jd_to_timestamptz(event_jd)); + values[1] = PointerGetDatum( + cstring_to_text(ctx->looking_for_rise ? "rise" : "set")); + + tuple = heap_form_tuple(funcctx->tuple_desc, values, nulls); + + /* Advance past this event */ + ctx->current_jd = event_jd + COARSE_STEP_JD; + ctx->looking_for_rise = !ctx->looking_for_rise; + + SRF_RETURN_NEXT(funcctx, HeapTupleGetDatum(tuple)); + } +} + + +/* ================================================================ + * planet_rise_set_events(body_id, observer, start, stop [, refracted]) + * -> TABLE(event_time timestamptz, event_type text) + * ================================================================ + */ +Datum +planet_rise_set_events(PG_FUNCTION_ARGS) +{ + return rise_set_events_internal(fcinfo, BTYPE_PLANET, 0); +} + + +/* ================================================================ + * sun_rise_set_events(observer, start, stop [, refracted]) + * -> TABLE(event_time timestamptz, event_type text) + * ================================================================ + */ +Datum +sun_rise_set_events(PG_FUNCTION_ARGS) +{ + return rise_set_events_internal(fcinfo, BTYPE_SUN, -1); +} + + +/* ================================================================ + * moon_rise_set_events(observer, start, stop [, refracted]) + * -> TABLE(event_time timestamptz, event_type text) + * ================================================================ + */ +Datum +moon_rise_set_events(PG_FUNCTION_ARGS) +{ + return rise_set_events_internal(fcinfo, BTYPE_MOON, -1); +} diff --git a/src/types.h b/src/types.h index ad4a16f..b1c5a62 100644 --- a/src/types.h +++ b/src/types.h @@ -255,6 +255,7 @@ typedef struct pg_equatorial #define GAUSS_K2 (GAUSS_K * GAUSS_K) #define OBLIQUITY_J2000 0.40909280422232897 /* 23.4392911 deg in radians */ #define C_LIGHT_AU_DAY 173.1446327 /* speed of light, AU/day (299792.458 * 86400 / 149597870.7) */ +#define SUN_RADIUS_KM 695700.0 /* solar radius, km (IAU 2015) */ /* * Solar system body IDs (VSOP87 convention, extended) diff --git a/test/expected/v018_features.out b/test/expected/v018_features.out new file mode 100644 index 0000000..e1d5536 --- /dev/null +++ b/test/expected/v018_features.out @@ -0,0 +1,312 @@ +-- v018_features.sql -- Tests for v0.18.0: Saturn ring tilt, penumbral eclipse, +-- rise/set event windows, angular separation rate +-- +-- Verifies all 10 new functions added in v0.18.0. +CREATE EXTENSION IF NOT EXISTS pg_orrery; +NOTICE: extension "pg_orrery" already exists, skipping +-- ============================================================ +-- Saturn ring tilt: in [-27, +27] range +-- ============================================================ +SELECT saturn_ring_tilt('2024-01-15 00:00:00+00'::timestamptz) BETWEEN -27.0 AND 27.0 + AS ring_tilt_in_range; + ring_tilt_in_range +-------------------- + t +(1 row) + +-- ============================================================ +-- Saturn ring tilt: near zero around 2025 ring crossing +-- (rings edge-on to Earth around March 2025) +-- ============================================================ +SELECT abs(saturn_ring_tilt('2025-03-23 00:00:00+00'::timestamptz)) < 5.0 + AS ring_tilt_near_edge_on; + ring_tilt_near_edge_on +------------------------ + t +(1 row) + +-- ============================================================ +-- Saturn ring tilt: varies over time (not constant) +-- ============================================================ +SELECT saturn_ring_tilt('2024-01-01 00:00:00+00'::timestamptz) + != saturn_ring_tilt('2024-07-01 00:00:00+00'::timestamptz) + AS ring_tilt_varies; + ring_tilt_varies +------------------ + t +(1 row) + +-- ============================================================ +-- Saturn ring tilt: sign changes across ring plane crossing +-- (2017 was fully open, 2025 is edge-on, tilt changes sign) +-- ============================================================ +SELECT abs(saturn_ring_tilt('2017-06-15 00:00:00+00'::timestamptz)) > 10.0 + AS ring_tilt_open_2017; + ring_tilt_open_2017 +--------------------- + t +(1 row) + +-- ============================================================ +-- Planet magnitude: Saturn now includes ring correction +-- (ring-corrected magnitude should differ from globe-only) +-- Saturn magnitude should be roughly between -0.5 and +1.5 +-- ============================================================ +SELECT planet_magnitude(6, '2024-01-15 00:00:00+00'::timestamptz) BETWEEN -1.0 AND 2.0 + AS saturn_mag_valid_range; + saturn_mag_valid_range +------------------------ + t +(1 row) + +-- ============================================================ +-- Satellite shadow state: returns valid text values +-- ============================================================ +SELECT satellite_shadow_state( + E'1 25544U 98067A 24001.50000000 .00016717 00000-0 10270-3 0 9025\n2 25544 51.6400 208.9163 0006703 30.1694 61.7520 15.50100486 00001'::tle, + '2024-01-01 12:00:00+00'::timestamptz +) IN ('sunlit', 'penumbra', 'umbra') + AS shadow_state_valid; + shadow_state_valid +-------------------- + t +(1 row) + +-- ============================================================ +-- Satellite in penumbra: returns bool +-- ============================================================ +SELECT satellite_in_penumbra( + E'1 25544U 98067A 24001.50000000 .00016717 00000-0 10270-3 0 9025\n2 25544 51.6400 208.9163 0006703 30.1694 61.7520 15.50100486 00001'::tle, + '2024-01-01 12:00:00+00'::timestamptz +) IS NOT NULL + AS penumbra_returns_bool; + penumbra_returns_bool +----------------------- + t +(1 row) + +-- ============================================================ +-- Backward compatibility: satellite_is_eclipsed still works +-- (cone model upgrade is internal-only) +-- ============================================================ +SELECT satellite_is_eclipsed( + E'1 25544U 98067A 24001.50000000 .00016717 00000-0 10270-3 0 9025\n2 25544 51.6400 208.9163 0006703 30.1694 61.7520 15.50100486 00001'::tle, + '2024-01-01 12:00:00+00'::timestamptz +) IS NOT NULL + AS eclipse_backward_compat; + eclipse_backward_compat +------------------------- + t +(1 row) + +-- ============================================================ +-- Penumbra entry precedes umbra entry (penumbra is outer zone) +-- ============================================================ +SELECT satellite_next_penumbra_entry( + E'1 25544U 98067A 24001.50000000 .00016717 00000-0 10270-3 0 9025\n2 25544 51.6400 208.9163 0006703 30.1694 61.7520 15.50100486 00001'::tle, + '2024-01-01 12:00:00+00'::timestamptz +) <= satellite_next_eclipse_entry( + E'1 25544U 98067A 24001.50000000 .00016717 00000-0 10270-3 0 9025\n2 25544 51.6400 208.9163 0006703 30.1694 61.7520 15.50100486 00001'::tle, + '2024-01-01 12:00:00+00'::timestamptz +) AS penumbra_precedes_umbra; + penumbra_precedes_umbra +------------------------- + t +(1 row) + +-- ============================================================ +-- Penumbra exit is after penumbra entry +-- ============================================================ +SELECT satellite_next_penumbra_exit( + E'1 25544U 98067A 24001.50000000 .00016717 00000-0 10270-3 0 9025\n2 25544 51.6400 208.9163 0006703 30.1694 61.7520 15.50100486 00001'::tle, + '2024-01-01 12:00:00+00'::timestamptz +) > '2024-01-01 12:00:00+00'::timestamptz + AS penumbra_exit_in_future; + penumbra_exit_in_future +------------------------- + t +(1 row) + +-- ============================================================ +-- Eclipse fraction still valid after cone upgrade +-- ============================================================ +SELECT satellite_eclipse_fraction( + E'1 25544U 98067A 24001.50000000 .00016717 00000-0 10270-3 0 9025\n2 25544 51.6400 208.9163 0006703 30.1694 61.7520 15.50100486 00001'::tle, + '2024-01-01 12:00:00+00'::timestamptz, + '2024-01-01 14:00:00+00'::timestamptz +) BETWEEN 0.0 AND 1.0 + AS eclipse_fraction_still_valid; + eclipse_fraction_still_valid +------------------------------ + t +(1 row) + +-- ============================================================ +-- Sun rise/set events: mid-latitude 24h window returns events +-- ============================================================ +SELECT count(*) >= 1 AS sun_events_exist +FROM sun_rise_set_events( + '(43.7,-116.4,800)'::observer, + '2024-06-21 00:00:00+00'::timestamptz, + '2024-06-22 00:00:00+00'::timestamptz +); + sun_events_exist +------------------ + t +(1 row) + +-- ============================================================ +-- Sun rise/set events: events alternate rise/set +-- ============================================================ +SELECT bool_and(event_type IN ('rise', 'set')) AS sun_event_types_valid +FROM sun_rise_set_events( + '(43.7,-116.4,800)'::observer, + '2024-06-21 00:00:00+00'::timestamptz, + '2024-06-22 00:00:00+00'::timestamptz +); + sun_event_types_valid +----------------------- + t +(1 row) + +-- ============================================================ +-- Sun rise/set events: refracted vs geometric +-- (refracted rise is earlier than geometric rise) +-- ============================================================ +SELECT (SELECT min(event_time) FROM sun_rise_set_events( + '(43.7,-116.4,800)'::observer, + '2024-06-21 00:00:00+00'::timestamptz, + '2024-06-22 00:00:00+00'::timestamptz, + true +) WHERE event_type = 'rise') +<= +(SELECT min(event_time) FROM sun_rise_set_events( + '(43.7,-116.4,800)'::observer, + '2024-06-21 00:00:00+00'::timestamptz, + '2024-06-22 00:00:00+00'::timestamptz, + false +) WHERE event_type = 'rise') + AS refracted_rise_earlier; + refracted_rise_earlier +------------------------ + t +(1 row) + +-- ============================================================ +-- Moon rise/set events: returns valid event types +-- ============================================================ +SELECT bool_and(event_type IN ('rise', 'set')) AS moon_event_types_valid +FROM moon_rise_set_events( + '(43.7,-116.4,800)'::observer, + '2024-01-15 00:00:00+00'::timestamptz, + '2024-01-16 00:00:00+00'::timestamptz +); + moon_event_types_valid +------------------------ + t +(1 row) + +-- ============================================================ +-- Planet rise/set events: Jupiter over 24h +-- ============================================================ +SELECT count(*) >= 1 AS jupiter_events_exist +FROM planet_rise_set_events( + 5, + '(43.7,-116.4,800)'::observer, + '2024-01-15 00:00:00+00'::timestamptz, + '2024-01-16 00:00:00+00'::timestamptz +); + jupiter_events_exist +---------------------- + t +(1 row) + +-- ============================================================ +-- Rise/set events: window > 366 days rejected +-- ============================================================ +DO $$ BEGIN + PERFORM * FROM sun_rise_set_events( + '(43.7,-116.4,800)'::observer, + '2024-01-01 00:00:00+00'::timestamptz, + '2025-03-01 00:00:00+00'::timestamptz + ); +EXCEPTION WHEN OTHERS THEN + RAISE NOTICE 'window overflow: %', SQLERRM; +END $$; +NOTICE: window overflow: window exceeds 366-day maximum +-- ============================================================ +-- Rise/set events: stop before start rejected +-- ============================================================ +DO $$ BEGIN + PERFORM * FROM sun_rise_set_events( + '(43.7,-116.4,800)'::observer, + '2024-06-22 00:00:00+00'::timestamptz, + '2024-06-21 00:00:00+00'::timestamptz + ); +EXCEPTION WHEN OTHERS THEN + RAISE NOTICE 'stop before start: %', SQLERRM; +END $$; +NOTICE: stop before start: stop time must be after start time +-- ============================================================ +-- eq_angular_rate: generic rate computation +-- Two positions that are 10 deg apart, then 9 deg apart after 1 hour +-- should give rate = -1.0 deg/hr (approaching) +-- ============================================================ +SELECT abs(eq_angular_rate( + '(6.0, 45.0, 1.0)'::equatorial, + '(6.667, 45.0, 1.0)'::equatorial, + '(6.0, 45.0, 1.0)'::equatorial, + '(6.6, 45.0, 1.0)'::equatorial, + 3600.0 +)) > 0.0 + AS angular_rate_nonzero; + angular_rate_nonzero +---------------------- + t +(1 row) + +-- ============================================================ +-- eq_angular_rate: dt_seconds <= 0 rejected +-- ============================================================ +DO $$ BEGIN + PERFORM eq_angular_rate( + '(6.0, 45.0, 1.0)'::equatorial, + '(7.0, 45.0, 1.0)'::equatorial, + '(6.0, 45.0, 1.0)'::equatorial, + '(7.0, 45.0, 1.0)'::equatorial, + 0.0 + ); +EXCEPTION WHEN OTHERS THEN + RAISE NOTICE 'dt_seconds=0: %', SQLERRM; +END $$; +NOTICE: dt_seconds=0: eq_angular_rate: dt_seconds must be positive +-- ============================================================ +-- planet_angular_rate: Moon rate ~0.5 deg/hr relative to Sun +-- ============================================================ +SELECT abs(planet_angular_rate(0, 10, '2024-01-15 00:00:00+00'::timestamptz)) > 0.1 + AS moon_sun_rate_nonzero; + moon_sun_rate_nonzero +----------------------- + t +(1 row) + +-- ============================================================ +-- planet_angular_rate: same body rejected +-- ============================================================ +DO $$ BEGIN + PERFORM planet_angular_rate(5, 5, '2024-01-15 00:00:00+00'::timestamptz); +EXCEPTION WHEN OTHERS THEN + RAISE NOTICE 'same body: %', SQLERRM; +END $$; +NOTICE: same body: planet_angular_rate: body IDs must be different +-- ============================================================ +-- planet_angular_rate: Jupiter-Saturn rate is small +-- (outer planets move slowly) +-- ============================================================ +SELECT abs(planet_angular_rate(5, 6, '2024-01-15 00:00:00+00'::timestamptz)) < 1.0 + AS outer_planet_rate_slow; + outer_planet_rate_slow +------------------------ + t +(1 row) + diff --git a/test/sql/v018_features.sql b/test/sql/v018_features.sql new file mode 100644 index 0000000..40180e2 --- /dev/null +++ b/test/sql/v018_features.sql @@ -0,0 +1,259 @@ +-- v018_features.sql -- Tests for v0.18.0: Saturn ring tilt, penumbral eclipse, +-- rise/set event windows, angular separation rate +-- +-- Verifies all 10 new functions added in v0.18.0. + +CREATE EXTENSION IF NOT EXISTS pg_orrery; + +-- ============================================================ +-- Saturn ring tilt: in [-27, +27] range +-- ============================================================ + +SELECT saturn_ring_tilt('2024-01-15 00:00:00+00'::timestamptz) BETWEEN -27.0 AND 27.0 + AS ring_tilt_in_range; + +-- ============================================================ +-- Saturn ring tilt: near zero around 2025 ring crossing +-- (rings edge-on to Earth around March 2025) +-- ============================================================ + +SELECT abs(saturn_ring_tilt('2025-03-23 00:00:00+00'::timestamptz)) < 5.0 + AS ring_tilt_near_edge_on; + +-- ============================================================ +-- Saturn ring tilt: varies over time (not constant) +-- ============================================================ + +SELECT saturn_ring_tilt('2024-01-01 00:00:00+00'::timestamptz) + != saturn_ring_tilt('2024-07-01 00:00:00+00'::timestamptz) + AS ring_tilt_varies; + +-- ============================================================ +-- Saturn ring tilt: sign changes across ring plane crossing +-- (2017 was fully open, 2025 is edge-on, tilt changes sign) +-- ============================================================ + +SELECT abs(saturn_ring_tilt('2017-06-15 00:00:00+00'::timestamptz)) > 10.0 + AS ring_tilt_open_2017; + +-- ============================================================ +-- Planet magnitude: Saturn now includes ring correction +-- (ring-corrected magnitude should differ from globe-only) +-- Saturn magnitude should be roughly between -0.5 and +1.5 +-- ============================================================ + +SELECT planet_magnitude(6, '2024-01-15 00:00:00+00'::timestamptz) BETWEEN -1.0 AND 2.0 + AS saturn_mag_valid_range; + +-- ============================================================ +-- Satellite shadow state: returns valid text values +-- ============================================================ + +SELECT satellite_shadow_state( + E'1 25544U 98067A 24001.50000000 .00016717 00000-0 10270-3 0 9025\n2 25544 51.6400 208.9163 0006703 30.1694 61.7520 15.50100486 00001'::tle, + '2024-01-01 12:00:00+00'::timestamptz +) IN ('sunlit', 'penumbra', 'umbra') + AS shadow_state_valid; + +-- ============================================================ +-- Satellite in penumbra: returns bool +-- ============================================================ + +SELECT satellite_in_penumbra( + E'1 25544U 98067A 24001.50000000 .00016717 00000-0 10270-3 0 9025\n2 25544 51.6400 208.9163 0006703 30.1694 61.7520 15.50100486 00001'::tle, + '2024-01-01 12:00:00+00'::timestamptz +) IS NOT NULL + AS penumbra_returns_bool; + +-- ============================================================ +-- Backward compatibility: satellite_is_eclipsed still works +-- (cone model upgrade is internal-only) +-- ============================================================ + +SELECT satellite_is_eclipsed( + E'1 25544U 98067A 24001.50000000 .00016717 00000-0 10270-3 0 9025\n2 25544 51.6400 208.9163 0006703 30.1694 61.7520 15.50100486 00001'::tle, + '2024-01-01 12:00:00+00'::timestamptz +) IS NOT NULL + AS eclipse_backward_compat; + +-- ============================================================ +-- Penumbra entry precedes umbra entry (penumbra is outer zone) +-- ============================================================ + +SELECT satellite_next_penumbra_entry( + E'1 25544U 98067A 24001.50000000 .00016717 00000-0 10270-3 0 9025\n2 25544 51.6400 208.9163 0006703 30.1694 61.7520 15.50100486 00001'::tle, + '2024-01-01 12:00:00+00'::timestamptz +) <= satellite_next_eclipse_entry( + E'1 25544U 98067A 24001.50000000 .00016717 00000-0 10270-3 0 9025\n2 25544 51.6400 208.9163 0006703 30.1694 61.7520 15.50100486 00001'::tle, + '2024-01-01 12:00:00+00'::timestamptz +) AS penumbra_precedes_umbra; + +-- ============================================================ +-- Penumbra exit is after penumbra entry +-- ============================================================ + +SELECT satellite_next_penumbra_exit( + E'1 25544U 98067A 24001.50000000 .00016717 00000-0 10270-3 0 9025\n2 25544 51.6400 208.9163 0006703 30.1694 61.7520 15.50100486 00001'::tle, + '2024-01-01 12:00:00+00'::timestamptz +) > '2024-01-01 12:00:00+00'::timestamptz + AS penumbra_exit_in_future; + +-- ============================================================ +-- Eclipse fraction still valid after cone upgrade +-- ============================================================ + +SELECT satellite_eclipse_fraction( + E'1 25544U 98067A 24001.50000000 .00016717 00000-0 10270-3 0 9025\n2 25544 51.6400 208.9163 0006703 30.1694 61.7520 15.50100486 00001'::tle, + '2024-01-01 12:00:00+00'::timestamptz, + '2024-01-01 14:00:00+00'::timestamptz +) BETWEEN 0.0 AND 1.0 + AS eclipse_fraction_still_valid; + +-- ============================================================ +-- Sun rise/set events: mid-latitude 24h window returns events +-- ============================================================ + +SELECT count(*) >= 1 AS sun_events_exist +FROM sun_rise_set_events( + '(43.7,-116.4,800)'::observer, + '2024-06-21 00:00:00+00'::timestamptz, + '2024-06-22 00:00:00+00'::timestamptz +); + +-- ============================================================ +-- Sun rise/set events: events alternate rise/set +-- ============================================================ + +SELECT bool_and(event_type IN ('rise', 'set')) AS sun_event_types_valid +FROM sun_rise_set_events( + '(43.7,-116.4,800)'::observer, + '2024-06-21 00:00:00+00'::timestamptz, + '2024-06-22 00:00:00+00'::timestamptz +); + +-- ============================================================ +-- Sun rise/set events: refracted vs geometric +-- (refracted rise is earlier than geometric rise) +-- ============================================================ + +SELECT (SELECT min(event_time) FROM sun_rise_set_events( + '(43.7,-116.4,800)'::observer, + '2024-06-21 00:00:00+00'::timestamptz, + '2024-06-22 00:00:00+00'::timestamptz, + true +) WHERE event_type = 'rise') +<= +(SELECT min(event_time) FROM sun_rise_set_events( + '(43.7,-116.4,800)'::observer, + '2024-06-21 00:00:00+00'::timestamptz, + '2024-06-22 00:00:00+00'::timestamptz, + false +) WHERE event_type = 'rise') + AS refracted_rise_earlier; + +-- ============================================================ +-- Moon rise/set events: returns valid event types +-- ============================================================ + +SELECT bool_and(event_type IN ('rise', 'set')) AS moon_event_types_valid +FROM moon_rise_set_events( + '(43.7,-116.4,800)'::observer, + '2024-01-15 00:00:00+00'::timestamptz, + '2024-01-16 00:00:00+00'::timestamptz +); + +-- ============================================================ +-- Planet rise/set events: Jupiter over 24h +-- ============================================================ + +SELECT count(*) >= 1 AS jupiter_events_exist +FROM planet_rise_set_events( + 5, + '(43.7,-116.4,800)'::observer, + '2024-01-15 00:00:00+00'::timestamptz, + '2024-01-16 00:00:00+00'::timestamptz +); + +-- ============================================================ +-- Rise/set events: window > 366 days rejected +-- ============================================================ + +DO $$ BEGIN + PERFORM * FROM sun_rise_set_events( + '(43.7,-116.4,800)'::observer, + '2024-01-01 00:00:00+00'::timestamptz, + '2025-03-01 00:00:00+00'::timestamptz + ); +EXCEPTION WHEN OTHERS THEN + RAISE NOTICE 'window overflow: %', SQLERRM; +END $$; + +-- ============================================================ +-- Rise/set events: stop before start rejected +-- ============================================================ + +DO $$ BEGIN + PERFORM * FROM sun_rise_set_events( + '(43.7,-116.4,800)'::observer, + '2024-06-22 00:00:00+00'::timestamptz, + '2024-06-21 00:00:00+00'::timestamptz + ); +EXCEPTION WHEN OTHERS THEN + RAISE NOTICE 'stop before start: %', SQLERRM; +END $$; + +-- ============================================================ +-- eq_angular_rate: generic rate computation +-- Two positions that are 10 deg apart, then 9 deg apart after 1 hour +-- should give rate = -1.0 deg/hr (approaching) +-- ============================================================ + +SELECT abs(eq_angular_rate( + '(6.0, 45.0, 1.0)'::equatorial, + '(6.667, 45.0, 1.0)'::equatorial, + '(6.0, 45.0, 1.0)'::equatorial, + '(6.6, 45.0, 1.0)'::equatorial, + 3600.0 +)) > 0.0 + AS angular_rate_nonzero; + +-- ============================================================ +-- eq_angular_rate: dt_seconds <= 0 rejected +-- ============================================================ + +DO $$ BEGIN + PERFORM eq_angular_rate( + '(6.0, 45.0, 1.0)'::equatorial, + '(7.0, 45.0, 1.0)'::equatorial, + '(6.0, 45.0, 1.0)'::equatorial, + '(7.0, 45.0, 1.0)'::equatorial, + 0.0 + ); +EXCEPTION WHEN OTHERS THEN + RAISE NOTICE 'dt_seconds=0: %', SQLERRM; +END $$; + +-- ============================================================ +-- planet_angular_rate: Moon rate ~0.5 deg/hr relative to Sun +-- ============================================================ + +SELECT abs(planet_angular_rate(0, 10, '2024-01-15 00:00:00+00'::timestamptz)) > 0.1 + AS moon_sun_rate_nonzero; + +-- ============================================================ +-- planet_angular_rate: same body rejected +-- ============================================================ + +DO $$ BEGIN + PERFORM planet_angular_rate(5, 5, '2024-01-15 00:00:00+00'::timestamptz); +EXCEPTION WHEN OTHERS THEN + RAISE NOTICE 'same body: %', SQLERRM; +END $$; + +-- ============================================================ +-- planet_angular_rate: Jupiter-Saturn rate is small +-- (outer planets move slowly) +-- ============================================================ + +SELECT abs(planet_angular_rate(5, 6, '2024-01-15 00:00:00+00'::timestamptz)) < 1.0 + AS outer_planet_rate_slow;