pg_orrery

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Author	SHA1	Message	Date
Ryan Malloy	b33d63034b	Add v0.9.0 apparent position features: equatorial type, refraction, proper motion, light-time New equatorial type (24 bytes: RA/Dec/distance) captures apparent coordinates of date — what the observation pipeline computes at precession step 3 but was discarding before hour angle conversion. Matches telescope GoTo mount conventions. 24 new SQL functions (82 → 106 total): - equatorial type I/O + 3 accessors (eq_ra, eq_dec, eq_distance) - Satellite RA/Dec: eci_to_equatorial (topocentric), eci_to_equatorial_geo (geocentric) - Solar system equatorial: planet/sun/moon/small_body_equatorial - Atmospheric refraction: Bennett (1982) with domain clamp at -1 deg - Refracted pass prediction: predict_passes_refracted (horizon at -0.569 deg) - Stellar proper motion: star_observe_pm, star_equatorial_pm (Hipparcos/Gaia convention) - Light-time correction: planet/sun/small_body_observe_apparent, *_equatorial_apparent - DE equatorial variants: planet_equatorial_de, moon_equatorial_de Also includes v0.8.0 orbital_elements type (MPC parser, small_body_observe), GiST 0-based indexing fix, llms.txt updates, and doc improvements. All 18 regression suites pass. Zero build warnings (GCC + Clang).	2026-02-21 15:31:46 -07:00
Ryan Malloy	adfb6949e1	Add range rate fitting, weighted observations, and Gauss angles-only IOD (v0.6.0) Range rate: topocentric residuals now include an optional 4th component (dot(Δr, v_ecef) / \|Δr\|) with OD_RR_SCALE=10.0 for unit balancing. Controlled via fit_range_rate parameter on tle_from_topocentric(). Weighted observations: per-observation weights applied as √w scaling to both residuals and Jacobian rows, producing the weighted normal equations H'WH without explicit W construction. Weights parameter added to tle_from_eci, tle_from_topocentric, and tle_from_angles. Gauss angles-only IOD: Vallado Algorithm 52 implementation for seed-free orbit recovery from 3+ RA/Dec observations. New RA/Dec residual function with cos(dec) scaling and wrap-around handling. New tle_from_angles() and tle_from_angles_multi() SQL functions accepting RA in hours [0,24), Dec in degrees [-90,90]. New standalone test suite: test_od_gauss (17 assertions). New regression tests: Tests 18-25 covering range rate, weights, angles-only with/without seed, and error cases.	2026-02-17 17:48:13 -07:00

Author

SHA1

Message

Date

Ryan Malloy

b33d63034b

Add v0.9.0 apparent position features: equatorial type, refraction, proper motion, light-time

New equatorial type (24 bytes: RA/Dec/distance) captures apparent coordinates
of date — what the observation pipeline computes at precession step 3 but was
discarding before hour angle conversion. Matches telescope GoTo mount conventions.

24 new SQL functions (82 → 106 total):
- equatorial type I/O + 3 accessors (eq_ra, eq_dec, eq_distance)
- Satellite RA/Dec: eci_to_equatorial (topocentric), eci_to_equatorial_geo (geocentric)
- Solar system equatorial: planet/sun/moon/small_body_equatorial
- Atmospheric refraction: Bennett (1982) with domain clamp at -1 deg
- Refracted pass prediction: predict_passes_refracted (horizon at -0.569 deg)
- Stellar proper motion: star_observe_pm, star_equatorial_pm (Hipparcos/Gaia convention)
- Light-time correction: planet/sun/small_body_observe_apparent, *_equatorial_apparent
- DE equatorial variants: planet_equatorial_de, moon_equatorial_de

Also includes v0.8.0 orbital_elements type (MPC parser, small_body_observe),
GiST 0-based indexing fix, llms.txt updates, and doc improvements.

All 18 regression suites pass. Zero build warnings (GCC + Clang).

2026-02-21 15:31:46 -07:00

Ryan Malloy

adfb6949e1

Add range rate fitting, weighted observations, and Gauss angles-only IOD (v0.6.0)

Range rate: topocentric residuals now include an optional 4th component
(dot(Δr, v_ecef) / |Δr|) with OD_RR_SCALE=10.0 for unit balancing.
Controlled via fit_range_rate parameter on tle_from_topocentric().

Weighted observations: per-observation weights applied as √w scaling
to both residuals and Jacobian rows, producing the weighted normal
equations H'WH without explicit W construction. Weights parameter
added to tle_from_eci, tle_from_topocentric, and tle_from_angles.

Gauss angles-only IOD: Vallado Algorithm 52 implementation for
seed-free orbit recovery from 3+ RA/Dec observations. New RA/Dec
residual function with cos(dec) scaling and wrap-around handling.
New tle_from_angles() and tle_from_angles_multi() SQL functions
accepting RA in hours [0,24), Dec in degrees [-90,90].

New standalone test suite: test_od_gauss (17 assertions).
New regression tests: Tests 18-25 covering range rate, weights,
angles-only with/without seed, and error cases.

2026-02-17 17:48:13 -07:00

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