[AstroPy] Distortion coefficients - FITS Header of an image

[Daniel Evans]

I believe he was referring to the manufacturer of your astrometry software
(PinPoint), not Astropy.

As far as I can tell, the TRi_j entries are not part of the FITS WCS
definition, nor are they part of the proposed WCS Distortion representation
system. Many of the WCS projections and proposed distortion functions use
inputs stored in the header as i_j values, but your header doesn't seem to
specify what function the TRi_j values are inputs for.

To use the values, you would have to find out what function PinPoint is
using for distortion correction. However, I doubt astropy.wcs will be very
helpful for using that distortion correction, as it only handles FITS
headers following the WCS standard.

Regards,
Daniel

On 2 September 2016 at 15:50, alice paschal <alice.pasch at orange.fr> wrote:

> Would you have an email address of the manufacturer please ? Because I
> thought that I could get a contact with the Astropy email address.
>
>
>
> Thank you
>
> Alice
>
>
>
>
>
> > Message du 01/09/16 15:28
> > De : "Pey Lian Lim" <p3y1i4n at gmail.com>
> > A : astropy at scipy.org
> > Copie à :
> > Objet : Re: [AstroPy] AstroPy Digest, Vol 120, Issue 1
> >
> >
> Re: Derek, on the contrary, I prefer the Google mailing list. I never
> figured out how to reply properly to a conversation in this list since I
> only get a digest. Also, it is hard to search and browse.
> >
> >
> Re: Alice, did you try asking the manufacturer about their WCS convention?
> >
> >
>
> >
> On Thu, Sep 1, 2016 at 5:28 AM, <astropy-request at scipy.org> wrote:
> >
> > Today's Topics:
> >
> >    1. Re: PR 3655 (Fortran-style and large exponents in ascii.io)
> >       (Derek Homeier)
> >    2. Distortion coefficients - FITS Header of an image (alice paschal)
> >    3. Python in Astronomy 2017 Conference (Stuart Mumford)
> >
> >
> > ----------------------------------------------------------------------
> >
> > Message: 1
> > Date: Wed, 31 Aug 2016 22:57:45 +0200
> > From: Derek Homeier <derek at astro.physik.uni-goettingen.de>
> > To: Astronomical Python mailing list <astropy at scipy.org>
> > Subject: Re: [AstroPy] PR 3655 (Fortran-style and large exponents in
> >         ascii.io)
> > Message-ID:
> >         <14702044-8E25-423B-BD3B-770F43685CDF at astro.physik.uni-
> goettingen.de>
> > Content-Type: text/plain; charset=utf-8
> >
> > As another follow-up to this story, just in case any of the developers
> are still following this list,
> > is it possible at all to sign up to astropy-dev as a normal mailing list?
> > The only way right now appears to be with ones Google+ account, which is
> a major pain at
> > this point as Google seems unable to restore access to my original
> account (which I haven?t
> > used in years to be fair), but at the same time refuses to link my
> preferred mail address to my
> > backup account, apparently because it is still linked to the lost
> original account?
> > Maybe I am too old-fashioned to join then, but a plain old mailing list
> that does not require a
> > specific provider would still seem a helpful instrument.
> >
> > Cheers,
> >                                         Derek
> >
>
>
>
>
> _______________________________________________
> AstroPy mailing list
> AstroPy at scipy.org
> https://mail.scipy.org/mailman/listinfo/astropy
>
>
> _______________________________________________
> AstroPy mailing list
> AstroPy at scipy.org
> https://mail.scipy.org/mailman/listinfo/astropy
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mail.python.org/pipermail/astropy/attachments/20160902/bf27cc5b/attachment.html>