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[fitsbits] Start of the Public Comment Period on 2 Image DistortionConventions
This is to announce the start of the 30-day Public Comment Period on
2 FITS conventions that deal with geometric distortions in images. The first convention, called Simple Imaging Polynomial or SIP, represents non-linear geometric distortion of the coordinate system via polynomial coefficients in FITS header keywords. The second convention, called TNX, extends the standard tangent plane WCS convention by adding a non-linear distortion function defined by polynomial coefficients that are stored using indexed WATj_nnn keywords. Detailed information about these conventions is available for public review and comment from the FITS registry web page at http://fits.gsfc.nasa.gov/fits_registry.html Comments may be posted here on the FITSBITS mail exploder or the sci.astro.fits newsgroup. Minor typographical issues may be sent directly to the authors of the convention. Bill Pence (on behalf of the IAU FITS Working Group) -- __________________________________________________ __________________ Dr. William Pence NASA/GSFC Code 662 HEASARC +1-301-286-4599 (voice) Greenbelt MD 20771 +1-301-286-1684 (fax) |
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