bilby.core.utils.conversion.ra_dec_to_theta_phi

bilby.core.utils.conversion.ra_dec_to_theta_phi(ra, dec, gmst)

Convert from RA and DEC to polar coordinates on celestial sphere

Parameters:

ra: float

right ascension in radians

dec: float

declination in radians

gmst: float

Greenwich mean sidereal time of arrival of the signal in radians

Returns:

float: zenith angle in radians

float: azimuthal angle in radians