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[task #15637] Match RA and Dec catalog to X and Y catalog to find WCS
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From: |
Mohammad Akhlaghi |
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Subject: |
[task #15637] Match RA and Dec catalog to X and Y catalog to find WCS |
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Date: |
Sat, 16 May 2020 22:44:37 -0400 (EDT) |
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User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:76.0) Gecko/20100101 Firefox/76.0 |
Follow-up Comment #3, task #15637 (project gnuastro):
WCSLIB's disp2x()
<https://www.atnf.csiro.au/people/mcalabre/WCS/wcslib/dis_8h.html#a135726e4c4c5bc00e2eba865ab202201>
and disx2p()
<https://www.atnf.csiro.au/people/mcalabre/WCS/wcslib/dis_8h.html#ac589d5e85afe3d775cba4c06734ce653>
may be very useful for this task.
In particular, after we have found the basic WCS parameters (CRVALs, CRPIXs,
CDELTs and PCs) and want to fine-tine/minimize the distortion. GSL has some
good general minimization/fitting functions we can use ;-).
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