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[task #15128] TPV and SIP keywords when WCS distortions are necessary

From: Mohammad Akhlaghi
Subject: [task #15128] TPV and SIP keywords when WCS distortions are necessary
Date: Mon, 18 May 2020 19:34:50 -0400 (EDT)
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:76.0) Gecko/20100101 Firefox/76.0

Follow-up Comment #21, task #15128 (project gnuastro):

Good progress! I have had a general look at it and you seem to be on the right
path ;-).

Just one small thing: 'wcspih' is the general function that is used to read
*all* WCS keywords from the input FITS header into 'wcsprm'. Its not just
limited to the distortion keywords. In Gnuastro, we already use it in the
<> function of

Now that you have the general outline and want to start digging deeper into
implementation details, you can use the 'main()' function I gave before and
start playing with the contents of the `wcsprm' to see effect of your changes
on the written WCS ;-).


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