sofa

Set of algorithms and procedures used in fundamental astronomy

The SOFA Collection consists of libraries of routines in ANSI C. There is a suite of vector/matrix routines and various utilities that underpin the astronomy algorithms, which include routines for the following: * Astrometry * Calendars * Time Scales * Ecliptic Coordinates * Earth Rotation and Sidereal Time * Ephemerides (medium precision) * Fundamental Arguments * Galactic Coordinates * Geocentric/Geodetic Transformations * Precession, Nutation and Polar Motion * Star Catalog Conversion