Sun Distance "real" or "apparent"?


#1

I want to determine the angle of a satellite’s ascending node with respect to the apparent Sun. I can get the TimeStampedPVCoordinates of the Sun in the TOD frame, and from there calculate the angle from ECI X-axis to the Sun. But I would like to know if the TimeStampedPVCoordinates are instantaneous values or if they consider light time travel (“apparent”). I can’t seem to find anything in the javadocs that would indicate one or the other.

Thanks,
Greg


#2

Light time travel is not taken into account.
You have to perform a small loop to consider it. You have an example of such a loop in AbstractMeasurement.signalTimeOfFlight.


#3

Thanks for the quick response Luc!

Greg