Collection of time, position, and utility functions for astronomy:
Julian and Modified Julian Day transformations, J2000/B1950 coordinate
transformations, GMST at 0h from UT, UT to LST and hour angle, angular
unit transformations and distance, etc. Precision generally at the
level of a millisecond in time for JD, 0.1 s for LST, and a few tenths
of an arcsecond in position for B2000-J1950 and vice versa.
Additional functions include flux from
thermal disk-shaped source, and others. Functions were originally assembled
to support single-dish radio astronomy planning and observations.
Cosmology-related functions are in the
Andrew Harris Maintainer: Andrew Harris <email@example.com>
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