- types.mdx: "seven" → "seven base types + one SQL composite",
add observer_window section with field table and usage example
- operators-gist.mdx: "three operators" → "four operators", reframe
SP-GiST performance as scalability feature (honest about seqscan
being faster at 14k catalog size, index helps at 100k+)
- installation.mdx: "14 test suites" → "15 test suites", list all
suites including od_fit, spgist_tle, vallado_518
- design-principles.mdx: clarify observer_window is SQL composite
(variable-length, query-time only), base types still STORAGE=plain
- pass-prediction.mdx: lead with operator value (80-90% elimination),
SP-GiST index framed as optional for large catalogs
New docs:
- guides/pass-prediction.mdx: two-stage workflow (SP-GiST filter
then SGP4 propagation), query window comparison tabs, GiST/SP-GiST
coexistence example
- reference/operators-gist.mdx: &? operator signature and description,
observer_window type reference, SP-GiST operator class docs with
eccentricity/HEO limitation aside
Benchmarks on 14,376 CelesTrak active satellites:
- SP-GiST index: 2,344 kB, builds in 19 ms
- GiST index: 2,904 kB, builds in 45 ms
- Consistency: 0 false negatives, 0 false positives
- At 14k catalog size, seqscan (~6 ms) still beats index scan (~8 ms)
due to low page count; cross-over expected at ~100k objects
New pages:
- OD function reference (tle_from_eci, tle_from_topocentric,
tle_from_angles, tle_fit_residuals)
- OD guide (ECI, topocentric, angles-only, range rate, weights,
multi-observer, covariance interpretation)
- From find_orb to SQL (OD workflow comparison)
- From Poliastro to SQL (Lambert/Kepler comparison)
Updated pages:
- Corrected stale "No orbit determination" claim
- Updated function counts and test suite counts
- Added v0.4.0-v0.6.0 upgrade paths
- Added OD to capabilities table, theory-to-code mapping,
constants/accuracy reference
- Added OD examples to Skyfield comparison and SQL Advantage
- Fixed stale version references across workflow pages
An existing product called PG Orbit (a mobile PostgreSQL client)
creates a naming conflict. pg_orrery — a database orrery built from
Keplerian parameters and SQL instead of brass gears.
Build system: control file, Makefile, Dockerfile, docker init script.
C source: GUC prefix, PG_FUNCTION_INFO_V1 symbol, header guards,
ereport prefixes, comments across ~30 files including vendored SGP4.
SQL: all 5 install/migration scripts, function name pg_orrery_ephemeris_info.
Tests: 9 SQL suites, 8 expected outputs, standalone DE reader test.
Documentation: CLAUDE.md, README.md, DESIGN.md, Starlight site infra,
36 MDX pages, OG renderer, logo SVG, docker-compose, agent threads.
All 13 regression suites pass. Docs site builds (37 pages).
Replace the sat_code git submodule (lib/sat_code/) with vendored
sources in src/sgp4/. The upstream .cpp files are renamed to .c —
the code is valid C99 with zero C++ features. This eliminates the
g++ and -lstdc++ build dependencies.
Adds 518 Vallado test vectors (AIAA 2006-6753-Rev1) as a 13th
regression suite to verify byte-identical numerical output.
Updates all documentation (CLAUDE.md, DESIGN.md, 11 MDX pages,
Dockerfile) to reflect the new layout and pure-C compilation.
Replace generic blackAndWhite preset with custom renderer using
site colors (#0a0e17 dark background, #f59e0b amber accents),
decorative orbital rings watermark, branded footer with pg_orbit
name and site URL. Inter font in 400/700 weights.
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.
