calc_gmst_gast

rubin_sim.utils.calc_gmst_gast(mjd)

Compute Greenwich mean sidereal time and Greenwich apparent sidereal time see: From http://aa.usno.navy.mil/faq/docs/GAST.php

Parameters:

mjdUnknown

is the universal time (ut1) expressed as an MJD

gmstUnknown

Greenwich mean sidereal time in hours

gastUnknown

Greenwich apparent sidereal time in hours