ZPX convention for Representing FITS Image Distortions
The ZPX World Coordinate System is a non-standard
coordinate system for evaluating celestial coordinates from the image
pixel coordinates. It follows the FITS conventions for undistorted
zenithal plane projections but adds a non-linear distortion term to the
September 2011 by Frank Valdes (NOAO)
Date and Place of First Usage:
circa 2000 for NOAO data and
support within the IRAF system.
Extent of Usage:
The ZPX convention is currently used in the FITS
files produced by NOAO that are taken with a variety of different
imaging instruments including MOSAIC and NEWFIRM.
Comments and/or critiques:
Sample FITS File:
Sample Header Listing:
Last revised: Monday, 30-Jul-2012 13:00:48 EDT
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