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#-----------------------------------------------------------------------------
# WCSLIB 7.4 - an implementation of the FITS WCS standard.
# Copyright (C) 1995-2021, Mark Calabretta
#
# This file is part of WCSLIB.
#
# WCSLIB is free software: you can redistribute it and/or modify it under the
# terms of the GNU Lesser General Public License as published by the Free
# Software Foundation, either version 3 of the License, or (at your option)
# any later version.
#
# WCSLIB is distributed in the hope that it will be useful, but WITHOUT ANY
# WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
# FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for
# more details.
#
# You should have received a copy of the GNU Lesser General Public License
# along with WCSLIB. If not, see http://www.gnu.org/licenses.
#
# Author: Mark Calabretta, Australia Telescope National Facility, CSIRO.
# http://www.atnf.csiro.au/people/Mark.Calabretta
# $Id: SIP.keyrec,v 7.4 2021/01/31 02:24:52 mcalabre Exp $
#-----------------------------------------------------------------------------
#
# FITS header keyrecords based on the "SIP" (Simple Imaging Polynomial)
# distortion used by tdis2 primarily for testing wcssub().
#
# This header was adapted from the sample provided at
# http://fits.gsfc.nasa.gov/registry/sip/sipsample.txt
#
# Use 'tofits' (supplied) to convert this file to proper FITS format via
#
# tofits < SIP.keyrec > SIP.fits
#
# Lines in this file beginning with '#' are ignored by tofits.
#
#-----------------------------------------------------------------------------
SIMPLE = T / Conforms to FITS standard
BITPIX = -32 / IEEE single precision floating point
NAXIS = 4 / 4 image axes
NAXIS1 = 256 / Length of image axis 1
NAXIS2 = 256 / Length of image axis 2
NAXIS3 = 2048 / Length of image axis 3
NAXIS4 = 128 / Length of image axis 4
CRPIX1 = 124.0 / Pixel coordinate of reference point
CRPIX2 = 132.0 / Pixel coordinate of reference point
CRPIX3 = 1024.5 / Pixel coordinate of reference point
CRPIX4 = 1.0 / Pixel coordinate of reference point
CD1_1 = 0.00024975688027236 / [deg] CD matrix element
CD1_2 = 0.00023017780974366 / [deg] CD matrix element
CD2_1 = 0.00023042851926542 / [deg] CD matrix element
CD2_2 = -0.00024996577057659 / [deg] CD matrix element
CD3_3 = 1.0E-10 / [m] CD matrix element
CD4_4 = 1.0 / [s] CD matrix element
CTYPE1 = 'RA---TAN-SIP' / TAN (gnomonic) projection + SIP distortions
CTYPE2 = 'DEC--TAN-SIP' / TAN (gnomonic) projection + SIP distortions
CTYPE3 = 'AWAV' / Wavelength in air
CTYPE4 = 'TIME' / Time
CRVAL1 = 202.482322805429 / [deg] Right ascension at the reference point
CRVAL2 = 47.175118930010 / [deg] Declination at the reference point
CRVAL3 = 5006.84E-10 / [m] [OIII]5007 Wavelength
CRVAL4 = 0.0 / [s] Elapsed time
A_ORDER = 3 / polynomial order, axis 1, pixel-to-sky
A_0_2 = 2.9656E-06 / distortion coefficient
A_0_3 = 3.7746E-09 / distortion coefficient
A_1_1 = 2.1886E-05 / distortion coefficient
A_1_2 = -1.6847E-07 / distortion coefficient
A_2_0 = -2.3863E-05 / distortion coefficient
A_2_1 = -8.5610E-09 / distortion coefficient
A_3_0 = -1.4172E-07 / distortion coefficient
A_DMAX = 1.394 / maximum correction to pixel coordinates
B_ORDER = 3 / polynomial order, axis 2, pixel-to-sky
B_0_2 = 2.3100E-05 / distortion coefficient
B_0_3 = -1.6168E-07 / distortion coefficient
B_1_1 = -2.4386E-05 / distortion coefficient
B_1_2 = -5.7813E-09 / distortion coefficient
B_2_0 = 2.1197E-06 / distortion coefficient
B_2_1 = -1.6583E-07 / distortion coefficient
B_3_0 = -2.0249E-08 / distortion coefficient
B_DMAX = 1.501 / maximum correction to pixel coordinates
AP_ORDER= 3 / polynomial order, axis 1, sky-to-pixel
AP_0_1 = -6.4275E-07 / distortion coefficient
AP_0_2 = -2.9425E-06 / distortion coefficient
AP_0_3 = -3.5820E-09 / distortion coefficient
AP_1_0 = -1.4897E-05 / distortion coefficient
AP_1_1 = -2.2250E-05 / distortion coefficient
AP_1_2 = 1.7195E-07 / distortion coefficient
AP_2_0 = 2.4146E-05 / distortion coefficient
AP_2_1 = 6.7090E-09 / distortion coefficient
AP_3_0 = 1.4492E-07 / distortion coefficient
BP_ORDER= 3 / polynomial order, axis 2, sky-to-pixel
BP_0_1 = -1.6588E-05 / distortion coefficient
BP_0_2 = -2.3424E-05 / distortion coefficient
BP_0_3 = 1.6510E-07 / distortion coefficient
BP_1_0 = -2.6783E-06 / distortion coefficient
BP_1_1 = 2.4753E-05 / distortion coefficient
BP_1_2 = 3.8917E-09 / distortion coefficient
BP_2_0 = -2.1510E-06 / distortion coefficient
BP_2_1 = 1.7000E-07 / distortion coefficient
BP_3_0 = 2.0482E-08 / distortion coefficient
END
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