def project(self, object_radec):
az, alt = radec_to_azalt(self.date, object_radec, self.reference_lonlat)
if self.azalt_offsets:
daz, dalt = self.azalt_offsets
az, alt = rotate_azalt(az, alt, daz, dalt)
return AzAlt(az, alt)
def unproject(self, azalt):
if self.azalt_offsets:
az, alt = azalt
daz, dalt = self.azalt_offsets
az, alt = rotate_azalt(az, alt, daz, dalt, True)
azalt = AzAlt(az, alt)
ra, dec = azalt_to_radec(self.date, azalt, self.reference_lonlat)
return RaDec(ra, dec)