SpiceState.light_time¶
giant.utilities.spice_interface
:
- SpiceState.light_time(date)[source]¶
Make the call to spkezr given the stored settings at the input date returning only the light time in TDB seconds.
Specifically the call is
spiceypy.spkezr(self.target, datetime_to_et(date), self.reference_frame, self.corrections, self.observer)[1]
where
datetime_to_et()
converts a datetime object into ephemeris (TDB) seconds since the J2000 epoch and we take the second return to get the light time and not the position vector- Parameters:
date (datetime) – The date we are querying spice at as a datetime object
- Returns:
The one way light time between the observer and the target in TDB seconds.
- Return type:
float