[task #15636] Warp image to a fixed center position, accounting for distortions

[Mohammad Akhlaghi]

URL:
  <https://savannah.gnu.org/task/?15636>

                 Summary: Warp image to a fixed center position, accounting
for distortions
                 Project: GNU Astronomy Utilities
            Submitted by: makhlaghi
            Submitted on: Tue 12 May 2020 01:47:23 AM BST
         Should Start On: Tue 12 May 2020 12:00:00 AM BST
   Should be Finished on: Tue 12 May 2020 12:00:00 AM BST
                Category: Warp
                Priority: 5 - Normal
              Item Group: Enhancement
                  Status: None
                 Privacy: Public
        Percent Complete: 0%
             Assigned to: sks_15
             Open/Closed: Open
         Discussion Lock: Any
                  Effort: 0.00

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Details:

Assuming `image.fits' has a correct/accurate WCS, once this task is complete,
the user will be able to call Warp like this:


astwarp image.fits --center=RA,DEC --width=W1,W2


The output image will have a width of W1 (degrees) in first WCS axis and W2
(degrees) in second WCS axis and the center of the central pixel will be at RA
and Dec. In the meantime, the image will be aligned to the celestial
coordinates (East to the left and North to the top) and all optical and
spherical distortions will be corrected.

The distortions are very important for this task so it will also involve
adding non-linear warps, especially as the image becomes wide such that
optical and spherical distortions become significant. 




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