What is the difference between "zeropoint" and "photometric solution"?
There seem to be two calibrations for the photometric solution / zeropoint.
Photometric Zeropoint Imaging Task tab:
- Only used in the Calibration Plan (google doc)
- Name: "Zeropoint"
- ReqID: DPS-3040-SCI
- Recipe ID: mcd_img_zeropoint (but mcd_img_photom in the summary table)
Photometric Solution Imaging Task tab:
- Only used in the Data Reduction Library Specifictation (google doc)
- Name: "Photometric solution"
- ReqID: DPS-3150-SCI
- Recipe ID: mcd_img_photom
Both produce "zeropoint and extinction coefficient, one pair per detector (PHOTOM_TAB)".
Since they are very equivalent, and one is only referenced in the CP and the other one only in the DRLS, it seems that one of them is redundant.
In the digital design we only model the latter (with mcd_img_photom and DPS-3150-SCI), so if we keep only one, my proposal is to keep that one.
@verdoes can you illuminate this situation?