Ryan Malloy
46c8a30575
Twilight: 6 functions (civil/nautical/astronomical × dawn/dusk) reusing the existing find_next_crossing() bisection search with Sun depression angle thresholds (-6°, -12°, -18°). Returns NULL for polar regions where the threshold is never reached. Lunar phase: 4 functions computing Sun-Earth-Moon geometry from VSOP87 + ELP2000-82B. Phase angle [0,360) via elongation + cross product z-component for waxing/waning discrimination. 8 named phases in 45° bins. Moon age approximated from phase angle and mean synodic month. Planet magnitude: Mallama & Hilton (2018) polynomial model with VSOP87 heliocentric distances and phase angle via law of cosines. All 7 planets (Mercury-Neptune, excluding Earth). Saturn ring tilt not modeled. 151 → 162 SQL objects. 26 → 27 test suites, all passing.
162 lines
7.3 KiB
SQL
162 lines
7.3 KiB
SQL
-- v016_features.sql -- Tests for v0.16.0: twilight, lunar phase, planet magnitude
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--
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-- Verifies twilight dawn/dusk, lunar phase calculations,
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-- and planet apparent magnitude.
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CREATE EXTENSION IF NOT EXISTS pg_orrery;
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-- ============================================================
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-- Twilight: ordering (astronomical < nautical < civil < sunrise)
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-- Eagle, Idaho on the 2024 summer solstice
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-- ============================================================
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-- Dawn ordering: astronomical dawn < nautical dawn < civil dawn < sunrise
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-- Use midnight MDT (07:00 UTC) so all "next" events land on the same morning
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SELECT sun_astronomical_dawn('(43.7,-116.4,800)'::observer, '2024-06-21 07:00:00+00'::timestamptz)
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< sun_nautical_dawn('(43.7,-116.4,800)'::observer, '2024-06-21 07:00:00+00'::timestamptz)
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AS astro_before_nautical;
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SELECT sun_nautical_dawn('(43.7,-116.4,800)'::observer, '2024-06-21 07:00:00+00'::timestamptz)
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< sun_civil_dawn('(43.7,-116.4,800)'::observer, '2024-06-21 07:00:00+00'::timestamptz)
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AS nautical_before_civil;
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SELECT sun_civil_dawn('(43.7,-116.4,800)'::observer, '2024-06-21 07:00:00+00'::timestamptz)
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< sun_next_rise('(43.7,-116.4,800)'::observer, '2024-06-21 07:00:00+00'::timestamptz)
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AS civil_before_sunrise;
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-- Dusk ordering: sunset < civil dusk < nautical dusk < astronomical dusk
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-- Noon MDT (18:00 UTC) ensures all dusk events are still ahead
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SELECT sun_next_set('(43.7,-116.4,800)'::observer, '2024-06-21 18:00:00+00'::timestamptz)
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< sun_civil_dusk('(43.7,-116.4,800)'::observer, '2024-06-21 18:00:00+00'::timestamptz)
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AS sunset_before_civil;
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SELECT sun_civil_dusk('(43.7,-116.4,800)'::observer, '2024-06-21 18:00:00+00'::timestamptz)
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< sun_nautical_dusk('(43.7,-116.4,800)'::observer, '2024-06-21 18:00:00+00'::timestamptz)
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AS civil_before_nautical;
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SELECT sun_nautical_dusk('(43.7,-116.4,800)'::observer, '2024-06-21 18:00:00+00'::timestamptz)
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< sun_astronomical_dusk('(43.7,-116.4,800)'::observer, '2024-06-21 18:00:00+00'::timestamptz)
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AS nautical_before_astro;
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-- ============================================================
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-- Twilight: civil dawn ~30 min before sunrise at mid-latitude
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-- ============================================================
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SELECT extract(epoch FROM
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sun_next_rise('(43.7,-116.4,800)'::observer, '2024-06-21 07:00:00+00'::timestamptz)
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- sun_civil_dawn('(43.7,-116.4,800)'::observer, '2024-06-21 07:00:00+00'::timestamptz)
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) BETWEEN 1200 AND 3600
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AS civil_dawn_reasonable_offset;
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-- ============================================================
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-- Twilight: high latitude summer -- no astronomical darkness
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-- At 60N in June, astronomical dusk should be NULL (never gets dark enough)
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-- ============================================================
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SELECT sun_astronomical_dusk('(60.0,25.0,0)'::observer, '2024-06-21 00:00:00+00'::timestamptz) IS NULL
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AS no_astro_dark_60n_summer;
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-- ============================================================
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-- Lunar phase: known full moon (2024-01-25 ~17:54 UTC)
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-- Phase angle should be near 180 deg, illumination near 1.0
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-- ============================================================
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SELECT round(moon_phase_angle('2024-01-25 18:00:00+00'::timestamptz)::numeric, 0)
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BETWEEN 170 AND 190
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AS full_moon_angle_near_180;
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SELECT round(moon_illumination('2024-01-25 18:00:00+00'::timestamptz)::numeric, 2)
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>= 0.95
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AS full_moon_high_illumination;
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SELECT moon_phase_name('2024-01-25 18:00:00+00'::timestamptz) = 'full_moon'
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AS full_moon_named;
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-- ============================================================
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-- Lunar phase: known new moon (2024-01-11 ~11:57 UTC)
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-- Phase angle should be near 0 or 360, illumination near 0
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-- ============================================================
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SELECT moon_illumination('2024-01-11 12:00:00+00'::timestamptz)
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< 0.05
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AS new_moon_low_illumination;
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SELECT moon_phase_name('2024-01-11 12:00:00+00'::timestamptz) = 'new_moon'
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AS new_moon_named;
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-- ============================================================
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-- Lunar phase: first quarter (2024-01-18 ~03:53 UTC)
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-- Phase angle near 90, illumination near 0.5
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-- ============================================================
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SELECT round(moon_phase_angle('2024-01-18 04:00:00+00'::timestamptz)::numeric, 0)
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BETWEEN 80 AND 100
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AS first_quarter_angle_near_90;
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SELECT moon_illumination('2024-01-18 04:00:00+00'::timestamptz)
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BETWEEN 0.4 AND 0.6
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AS first_quarter_half_illuminated;
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SELECT moon_phase_name('2024-01-18 04:00:00+00'::timestamptz) = 'first_quarter'
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AS first_quarter_named;
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-- ============================================================
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-- Moon age: new moon has age near 0, full moon near 14.7
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-- ============================================================
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SELECT moon_age('2024-01-11 12:00:00+00'::timestamptz) < 2.0
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AS new_moon_young;
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SELECT moon_age('2024-01-25 18:00:00+00'::timestamptz)
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BETWEEN 12.0 AND 17.0
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AS full_moon_age_midcycle;
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-- ============================================================
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-- Illumination range: always [0, 1]
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-- ============================================================
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SELECT moon_illumination('2024-06-01 00:00:00+00'::timestamptz) BETWEEN 0.0 AND 1.0
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AND moon_illumination('2024-09-01 00:00:00+00'::timestamptz) BETWEEN 0.0 AND 1.0
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AND moon_illumination('2024-12-01 00:00:00+00'::timestamptz) BETWEEN 0.0 AND 1.0
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AS illumination_always_valid;
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-- ============================================================
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-- Planet magnitude: Jupiter should be bright (negative mag)
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-- ============================================================
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SELECT planet_magnitude(5, '2024-01-15 00:00:00+00'::timestamptz) < 0.0
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AS jupiter_is_bright;
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-- ============================================================
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-- Planet magnitude: Venus is the brightest planet
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-- ============================================================
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SELECT planet_magnitude(2, '2024-06-01 12:00:00+00'::timestamptz)
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< planet_magnitude(4, '2024-06-01 12:00:00+00'::timestamptz)
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AS venus_brighter_than_mars;
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-- ============================================================
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-- Planet magnitude: Neptune is faint (~+7-8)
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-- ============================================================
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SELECT planet_magnitude(8, '2024-01-15 00:00:00+00'::timestamptz) > 7.0
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AS neptune_is_faint;
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-- ============================================================
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-- Planet magnitude: all planets return finite values
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-- ============================================================
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SELECT bool_and(
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planet_magnitude(body_id, '2024-01-15 00:00:00+00'::timestamptz) IS NOT NULL
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AND planet_magnitude(body_id, '2024-01-15 00:00:00+00'::timestamptz) > -30
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AND planet_magnitude(body_id, '2024-01-15 00:00:00+00'::timestamptz) < 30
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) AS all_magnitudes_finite
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FROM (VALUES (1),(2),(4),(5),(6),(7),(8)) AS t(body_id);
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-- ============================================================
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-- Planet magnitude: error cases
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-- ============================================================
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DO $$ BEGIN PERFORM planet_magnitude(0, '2024-01-15 00:00:00+00'::timestamptz); EXCEPTION WHEN OTHERS THEN RAISE NOTICE 'body_id=0(Sun): %', SQLERRM; END $$;
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DO $$ BEGIN PERFORM planet_magnitude(3, '2024-01-15 00:00:00+00'::timestamptz); EXCEPTION WHEN OTHERS THEN RAISE NOTICE 'body_id=3(Earth): %', SQLERRM; END $$;
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DO $$ BEGIN PERFORM planet_magnitude(9, '2024-01-15 00:00:00+00'::timestamptz); EXCEPTION WHEN OTHERS THEN RAISE NOTICE 'body_id=9: %', SQLERRM; END $$;
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