Hero tagline: "It's not rocket science. (It's celestial mechanics.
But now it's just SQL.)" across README, index.mdx, and meta description.
Add astro-icon with Lucide icon set, astro-seo-meta, and
astro-opengraph-images (blackAndWhite preset, Inter font). Override
Starlight Head component to inject og:image and twitter card tags
with auto-generated 1200x630 PNG images for all 37 pages.
Clean-room DE binary reader (~400 lines C) with Chebyshev/Clenshaw
evaluation — no GPL dependency on jpl_eph. Per-backend lazy
initialization preserves PARALLEL SAFE. Existing VSOP87/ELP82B
functions stay IMMUTABLE; new _de() variants are STABLE with
automatic fallback to compiled-in ephemerides on any DE failure.
Implementation:
- de_reader.c: header parse, record seek, Clenshaw recurrence
- eph_provider.c: GUC (pg_orbit.ephemeris_path), lazy init,
ICRS-to-ecliptic frame rotation, on_proc_exit cleanup
- de_funcs.c: 11 new SQL functions (_de variants + diagnostics)
- Constant chain of custody rules 6-8 (frame rotation,
same-provider, AU consistency)
Extract observe_from_geocentric() to astro_math.h for shared use
by planet_funcs.c, moon_funcs.c, and de_funcs.c.
57 → 68 functions, 11 → 12 regression test suites, all passing.
README covers all 57 functions across 9 domains with quick-start
examples, capability matrix, body ID tables, and performance benchmarks.
Links to Starlight docs site for detailed reference.
Adds Docker Compose deployment for docs site behind caddy-docker-proxy
with dev/prod modes and Vite HMR support through reverse proxy.
Implements 5 new C functions requested by the Craft (Astrolock) API team:
- tle_from_lines(text, text): two-argument TLE constructor
- observer_from_geodetic(float8, float8, float8): numeric observer constructor
- observe(tle, observer, timestamptz): single-call propagate + topocentric
- sgp4_propagate_safe(tle, timestamptz): returns NULL on propagation error
- observe_safe(tle, observer, timestamptz): returns NULL on propagation error
Refactors do_propagate() into safe/unsafe variants to support NULL returns.
Adds regression test (convenience.sql) covering all new functions including
an equivalence test verifying observe() matches the manual two-step pipeline.
All 6 regression tests pass.
6 custom types (tle, eci_position, geodetic, topocentric, observer,
pass_event), 67 SQL functions, 2 operators (&&, <->), and a GiST
operator class for altitude-band indexing. Wraps Bill Gray's sat_code
for SGP4/SDP4 propagation with WGS-72 constants for propagation and
WGS-84 for coordinate output. All 5 regression tests pass on PG 18.
