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	87ab81e7d0	Add observation-to-TLE fitting (orbit determination) for v0.4.0 Batch weighted least-squares differential correction using equinoctial elements, LAPACK dgelss_() for SVD solve, vendored SGP4/SDP4 as the propagation engine. Per Vallado & Crawford (2008) AIAA 2008-6770. New SQL functions: - tle_from_eci(): fit TLE from ECI position/velocity ephemeris - tle_from_topocentric(): fit TLE from az/el/range observations - tle_fit_residuals(): per-observation position residuals diagnostic Solver features: 6-state (orbital) or 7-state (+ B) fitting, equinoctial elements for singularity-free optimization, tiered step limiting, Brouwer/Kozai Newton-Raphson conversion, auto initial guess from first ECI observation when no seed TLE provided. Tested: 8 regression tests (LEO/MEO/near-circular round-trips, B recovery, topocentric, seedless, error handling, diagnostics), 67 standalone math unit tests, all 14 suites pass.	2026-02-17 15:44:48 -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

87ab81e7d0

Add observation-to-TLE fitting (orbit determination) for v0.4.0

Batch weighted least-squares differential correction using equinoctial
elements, LAPACK dgelss_() for SVD solve, vendored SGP4/SDP4 as the
propagation engine. Per Vallado & Crawford (2008) AIAA 2008-6770.

New SQL functions:
  - tle_from_eci(): fit TLE from ECI position/velocity ephemeris
  - tle_from_topocentric(): fit TLE from az/el/range observations
  - tle_fit_residuals(): per-observation position residuals diagnostic

Solver features: 6-state (orbital) or 7-state (+ B*) fitting,
equinoctial elements for singularity-free optimization, tiered step
limiting, Brouwer/Kozai Newton-Raphson conversion, auto initial guess
from first ECI observation when no seed TLE provided.

Tested: 8 regression tests (LEO/MEO/near-circular round-trips,
B* recovery, topocentric, seedless, error handling, diagnostics),
67 standalone math unit tests, all 14 suites pass.

2026-02-17 15:44:48 -07:00

2 Commits