[task #16136] Finding distortion parameters in the WCS

[Mohammad Akhlaghi]

URL:
  <https://savannah.gnu.org/task/?16136>

                 Summary: Finding distortion parameters in the WCS
                 Project: GNU Astronomy Utilities
            Submitted by: makhlaghi
            Submitted on: Thu 24 Mar 2022 08:49:11 AM UTC
         Should Start On: Thu 24 Mar 2022 12:00:00 AM UTC
   Should be Finished on: Thu 24 Mar 2022 12:00:00 AM UTC
                Category: Astrometry
                Priority: 5 - Normal
              Item Group: Enhancement
                  Status: Postponed
                 Privacy: Public
        Percent Complete: 0%
             Assigned to: None
             Open/Closed: Open
         Discussion Lock: Any
                  Effort: 0.00

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Details:

In task #15637, the linear WCS solution has been found. But distortions still
remain to be measured. So I am starting this new task for distortions.

The general parametric framework for WCS distortions are described in
Calabretta et al.
<https://www.atnf.csiro.au/people/mcalabre/WCS/dcs_20040422.pdf>. The most
common ones used in imaging are the TPV and SIP standards.

On a related note, I noticed this paper on arXiv today: Taheri et al. 2022
<https://iopscience.iop.org/article/10.3847/1538-3881/ac5747/pdf>. It
describes a method of finding distortions, which may be of interest for us in
this task. There are other papers/webpage/programs for this is well, we should
keep a library of the related work here in this task.




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