Hello everyone, I kindly ask for your feedback on the following approach!
What I need
I would like to perform Batch Least Squares Orbit Determination of an object, given space-based observations.
What I know
- Right Ascension / Declination measurements of a space object, from a space-based telescope
- Measurement uncertainty expressed in ra / dec respectively
- Position vector of the space-based telescope at each observation time, expressed in J2000.
What I would like to confirm
Since the uncertainty is expressed in ra/dec terms, I feel it makes sense to use
AngularRaDecto add the measurements (subject to your critical review).
In my effort to add
AngularRaDecmeasurements, I notice that the constructor requires a
GroundStationlocation, but my telescope is not fixed to the ground!
GroundStationinstanciates with a
Is there any problem with assuming that my space-based telescope is momentarily fixed in ITRF, and use the J2000-to-ITRF position of my observer to define a “fake” GroundStation (geodetic point) for every measurement, as the location of my space telescope?
As I understand, an alternative way would be to define a new Measurement type, very similar to
AngularRaDec, but for space-based measurements, according to this thorough explanation by Luc.
Thank you deeply in advance!