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v.1.4.0.0 -- Time refactoring, crossings, phenomena
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@lfborjas lfborjas released this 25 Nov 22:30
v1.4.0.0
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BREAKING CHANGE: Major refactoring of time values: JulianDay is no longer an alias for Double,
and is now a type that carries a witness of its provenance -- which enables us to work with functions that
transact in both Terrestrial (Ephemeris) Time, and Universal Time, without mixing them up.

  • Upgrades to version 2.10.02 of the C library.
  • Adds the Precalculated namespace with functions to read and write pre-calculated
    ephemeris from a file on disk. Useful when examining an interval of time for ecliptic phenomena.
  • Introduces the SwissEphemeris.Time module, with various conversions between time standards
    and some Haskell time values.
  • Introduces functions that find moments of exactitude for longitude crossings (heliocentric and geocentric,)
    and moments of exactitude for lunar phases. The geocentric interpolation, as well as lunar phases,
    use the Brent-Dekker algorithm for root finding, the heliocentric functions are able to do faster
    parabolic approximation. I need to study the C sources a bit more to see if something similar is possible
    for interpolation in general (see the events files in the C sources for ideas.)
  • Adds functions for calculating planetary phenomena as visible from earth, as well as solar and lunar eclipses.
  • [dev] adds a Dockerfile and NOTES.md to aid in diagnosing memory leaks.
  • [dev] adds some basic Nix derivations for producing documentations and a release tarball.
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