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Addresses #139 and #140. Integrates Archive compact VSOP87E and ELP2000-82B as a checked offline backend, with independent selection of IAU 2000B and precomputed topocentric lunar geometry. The ordinary default retains full ephemerides and IAU 2006A.
Across 486 DE440s/ERFA cases, the maximum geometric and annual-aberration-corrected topocentric separations were both 4.16 arcseconds. Observer-parallax validation identified and corrected an Earth rotation sign error. The migrated Linux reproduction uses 98,576 bytes of loadable file data versus 4,712,192 originally. The all-body ESP32 harness cross-compiled to a 189,888-byte flash image. Target hardware stack high-water and latency are pending, and the flash image measurement does not establish the contributor’s actual RAM-resident budget.
Depends on Siderust/tempoch#27. Pinned sibling checkouts in CI resolve Archive 0.2.0 and Tempoch 0.11.3 before publication. See
doc/embedded_compact.mdfor the dependency pins, patch removal, measurements, and reproducible workflows.Related: Siderust/archive#5, Siderust/archive#6, Siderust/archive#8, Siderust/archive#9, discussion #138, reporter reproduction.