#-----------------------------------------------------------------------------
# WCSLIB 8.7 - an implementation of the FITS WCS standard.
# Copyright (C) 1995-2026, 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/computing/software/wcs
# $Id: DSS.keyrec,v 8.7 2026/05/11 12:01:10 mcalabre Exp $
#-----------------------------------------------------------------------------
#
# FITS header keyrecords used for testing the handling of the Digitized Sky
# Survey (DSS) distortion function by WCSLIB.
#
# This header was adapted from an extract obtained from the STScI archive at
# http://archive.stsci.edu/cgi-bin/dss_form for object 'IC418' (Simbad) with
# an image size of 15 x 15 arcmin.  Keyrecords unrelated to coordinates have
# mostly been removed.
#
# Use 'tofits' (supplied) to convert this file to proper FITS format via
#
#     tofits < DSS.keyrec > DSS.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   =                    2 / 2 image axes
NAXIS1  =                  891 / Length of image axis 1
NAXIS2  =                  893 / Length of image axis 2

ORIGIN  = 'STScI/MAST'         /GSSS: STScI Digitized Sky Survey
SURVEY  = 'SERC-ER '           /GSSS: Sky Survey
REGION  = 'ER623   '           /GSSS: Region Name
PLATEID = 'A2OP    '           /GSSS: Plate ID
SCANNUM = '01      '           /GSSS: Scan Number
DSCNDNUM= '00      '           /GSSS: Descendant Number
TELESCID=                    4 /GSSS: Telescope ID
BANDPASS=                   36 /GSSS: Bandpass Code
COPYRGHT= 'AAO/ROE '           /GSSS: Copyright Holder

DATE-OBS= '1996-10-14T17:42:00' /Observation: Date/Time
EXPOSURE=                 60.0 /Observation: Exposure Minutes
PLTGRADE= 'A2      '           /Observation: Plate Grade
OBSHA   =            -0.116667 /Observation: Hour Angle
OBSZD   =              16.3556 /Observation: Zenith Distance
AIRMASS =              1.04208 /Observation: Airmass
REFBETA =        66.3196420000 /Observation: Refraction Coeff
REFBETAP=     -0.0820000000000 /Observation: Refraction Coeff
REFK1   =       -7317.80000000 /Observation: Refraction Coeff
REFK2   =       -60474.2200000 /Observation: Refraction Coeff

PLTSCALE=                67.20 /Detector: Plate Scale arcsec per mm
PLTSIZEX=              355.000 /Detector: Plate X Dimension mm
PLTSIZEY=              355.000 /Detector: Plate Y Dimension mm
PLATERA =        80.5634690000 /Observation: Field centre RA degrees
PLATEDEC=       -14.9583230000 /Observation: Field centre Dec degrees
PLTLABEL= 'OR17313 '           /Observation: Plate Label

CNPIX1  =                 6498 /Scan: X Corner
CNPIX2  =                19120 /Scan: Y Corner
XPIXELS =                23040 /Scan: X Dimension
YPIXELS =                23040 /Scan: Y Dimension
XPIXELSZ=              15.0295 /Scan: Pixel Size microns
YPIXELSZ=              15.0000 /Scan: Pixel Size microns
PPO1    =       -3069417.00000 /Scan: Orientation Coeff
PPO2    =       0.000000000000 /Scan: Orientation Coeff
PPO3    =        177500.000000 /Scan: Orientation Coeff
PPO4    =       0.000000000000 /Scan: Orientation Coeff
PPO5    =        3069417.00000 /Scan: Orientation Coeff
PPO6    =        177500.000000 /Scan: Orientation Coeff
PLTRAH  =                    5 /Astrometry: Plate Centre H
PLTRAM  =                   22 /Astrometry: Plate Centre M
PLTRAS  =                16.12 /Astrometry: Plate Centre S
PLTDECSN= '-       '           /Astrometry: Plate Centre +/-
PLTDECD =                   14 /Astrometry: Plate Centre D
PLTDECM =                   57 /Astrometry: Plate Centre M
PLTDECS =                 10.8 /Astrometry: Plate Centre S
EQUINOX =               2000.0 /Astrometry: Equinox

COMMENT  -----------------------------------------------------------------------
COMMENT  Guide Star Catalogue 1 coefficients.
COMMENT  -----------------------------------------------------------------------

AMDX1   =        67.1586924213 /Astrometry: GSC1 Coeff
AMDX2   =      -0.319046525929 /Astrometry: GSC1 Coeff
AMDX3   =       -307.222397476 /Astrometry: GSC1 Coeff
AMDX4   =  -2.94727512097E-005 /Astrometry: GSC1 Coeff
AMDX5   =   3.57034551060E-005 /Astrometry: GSC1 Coeff
AMDX6   =  -7.81953205318E-006 /Astrometry: GSC1 Coeff
AMDX7   =       0.000000000000 /Astrometry: GSC1 Coeff
AMDX8   =   2.01662503008E-006 /Astrometry: GSC1 Coeff
AMDX9   =  -6.78953469514E-008 /Astrometry: GSC1 Coeff
AMDX10  =   2.32375502821E-006 /Astrometry: GSC1 Coeff
AMDX11  =  -5.70870090870E-008 /Astrometry: GSC1 Coeff
AMDX12  =       0.000000000000 /Astrometry: GSC1 Coeff
AMDX13  =       0.000000000000 /Astrometry: GSC1 Coeff
AMDX14  =       0.000000000000 /Astrometry: GSC1 Coeff
AMDX15  =       0.000000000000 /Astrometry: GSC1 Coeff
AMDX16  =       0.000000000000 /Astrometry: GSC1 Coeff
AMDX17  =       0.000000000000 /Astrometry: GSC1 Coeff
AMDX18  =       0.000000000000 /Astrometry: GSC1 Coeff
AMDX19  =       0.000000000000 /Astrometry: GSC1 Coeff
AMDX20  =       0.000000000000 /Astrometry: GSC1 Coeff

AMDY1   =        67.1648535547 /Astrometry: GSC1 Coeff
AMDY2   =       0.317194761999 /Astrometry: GSC1 Coeff
AMDY3   =        295.118096783 /Astrometry: GSC1 Coeff
AMDY4   =   1.99924027359E-006 /Astrometry: GSC1 Coeff
AMDY5   =  -5.19116622905E-005 /Astrometry: GSC1 Coeff
AMDY6   =   1.19237255768E-005 /Astrometry: GSC1 Coeff
AMDY7   =       0.000000000000 /Astrometry: GSC1 Coeff
AMDY8   =   2.02173052273E-006 /Astrometry: GSC1 Coeff
AMDY9   =  -6.68994178481E-008 /Astrometry: GSC1 Coeff
AMDY10  =   2.11529862425E-006 /Astrometry: GSC1 Coeff
AMDY11  =  -6.66974464403E-008 /Astrometry: GSC1 Coeff
AMDY12  =       0.000000000000 /Astrometry: GSC1 Coeff
AMDY13  =       0.000000000000 /Astrometry: GSC1 Coeff
AMDY14  =       0.000000000000 /Astrometry: GSC1 Coeff
AMDY15  =       0.000000000000 /Astrometry: GSC1 Coeff
AMDY16  =       0.000000000000 /Astrometry: GSC1 Coeff
AMDY17  =       0.000000000000 /Astrometry: GSC1 Coeff
AMDY18  =       0.000000000000 /Astrometry: GSC1 Coeff
AMDY19  =       0.000000000000 /Astrometry: GSC1 Coeff
AMDY20  =       0.000000000000 /Astrometry: GSC1 Coeff

COMMENT  -----------------------------------------------------------------------
COMMENT  Guide Star Catalogue 2 coefficients.
COMMENT  -----------------------------------------------------------------------

AMDREX1 =        67.1515536626 /Astrometry: GSC2 Coeff
AMDREX2 =      -0.321604161010 /Astrometry: GSC2 Coeff
AMDREX3 =       -307.070931304 /Astrometry: GSC2 Coeff
AMDREX4 =   3.78456630241E-006 /Astrometry: GSC2 Coeff
AMDREX5 =   9.82753867931E-006 /Astrometry: GSC2 Coeff
AMDREX6 =   4.81926941509E-006 /Astrometry: GSC2 Coeff
AMDREX7 =       0.000000000000 /Astrometry: GSC2 Coeff
AMDREX8 =       0.000000000000 /Astrometry: GSC2 Coeff
AMDREX9 =       0.000000000000 /Astrometry: GSC2 Coeff
AMDREX10=       0.000000000000 /Astrometry: GSC2 Coeff
AMDREX11=       0.000000000000 /Astrometry: GSC2 Coeff
AMDREX12=       0.000000000000 /Astrometry: GSC2 Coeff
AMDREX13=       0.000000000000 /Astrometry: GSC2 Coeff
AMDREX14=       0.000000000000 /Astrometry: GSC2 Coeff
AMDREX15=       0.000000000000 /Astrometry: GSC2 Coeff
AMDREX16=       0.000000000000 /Astrometry: GSC2 Coeff
AMDREX17=       0.000000000000 /Astrometry: GSC2 Coeff
AMDREX18=       0.000000000000 /Astrometry: GSC2 Coeff
AMDREX19=       0.000000000000 /Astrometry: GSC2 Coeff
AMDREX20=       0.000000000000 /Astrometry: GSC2 Coeff

AMDREY1 =        67.1523286931 /Astrometry: GSC2 Coeff
AMDREY2 =       0.314721460695 /Astrometry: GSC2 Coeff
AMDREY3 =        294.917836411 /Astrometry: GSC2 Coeff
AMDREY4 =  -9.67594095615E-006 /Astrometry: GSC2 Coeff
AMDREY5 =  -1.26770977478E-005 /Astrometry: GSC2 Coeff
AMDREY6 =   8.47198751394E-006 /Astrometry: GSC2 Coeff
AMDREY7 =       0.000000000000 /Astrometry: GSC2 Coeff
AMDREY8 =       0.000000000000 /Astrometry: GSC2 Coeff
AMDREY9 =       0.000000000000 /Astrometry: GSC2 Coeff
AMDREY10=       0.000000000000 /Astrometry: GSC2 Coeff
AMDREY11=       0.000000000000 /Astrometry: GSC2 Coeff
AMDREY12=       0.000000000000 /Astrometry: GSC2 Coeff
AMDREY13=       0.000000000000 /Astrometry: GSC2 Coeff
AMDREY14=       0.000000000000 /Astrometry: GSC2 Coeff
AMDREY15=       0.000000000000 /Astrometry: GSC2 Coeff
AMDREY16=       0.000000000000 /Astrometry: GSC2 Coeff
AMDREY17=       0.000000000000 /Astrometry: GSC2 Coeff
AMDREY18=       0.000000000000 /Astrometry: GSC2 Coeff
AMDREY19=       0.000000000000 /Astrometry: GSC2 Coeff
AMDREY20=       0.000000000000 /Astrometry: GSC2 Coeff
ASTRMASK= 'er.mask '           /Astrometry: GSC2 Mask

COMMENT  -----------------------------------------------------------------------
COMMENT  This representation without distortions, computed by WCSLIB using
COMMENT  the method derived in Sect. 5.2 of WCS Paper IV, provides the best
COMMENT  approximation to the DSS plate solution in the vicinity of the plate
COMMENT  centre, which is the reference point here.
COMMENT  -----------------------------------------------------------------------

WCSNAMEA= 'DSS approximation without distortions computed by WCSLIB'
WCSAXESA=                    2 / Number of coordinate axes
CRPIX1A =        5009.62946648 / Pixel coordinate of reference point
CRPIX2A =       -7580.52942578 / Pixel coordinate of reference point
PC1_1A  =      0.0150286420582 / Coordinate transformation matrix element
PC1_2A  =    7.12554775909E-05 / Coordinate transformation matrix element
PC2_1A  =   -7.09812292194E-05 / Coordinate transformation matrix element
PC2_2A  =      0.0150005197625 / Coordinate transformation matrix element
CDELT1A =     -0.0186562573103 / [deg] Coordinate increment at reference point
CDELT2A =      0.0186562573103 / [deg] Coordinate increment at reference point
CUNIT1A = 'deg'                / Units of coordinate increment and value
CUNIT2A = 'deg'                / Units of coordinate increment and value
CTYPE1A = 'RA---TAN'           / Right ascension, gnomonic projection
CTYPE2A = 'DEC--TAN'           / Declination, gnomonic projection
CRVAL1A =        80.5671666667 / [deg] Coordinate value at reference point
CRVAL2A =              -14.953 / [deg] Coordinate value at reference point
LONPOLEA=                180.0 / [deg] Native longitude of celestial pole
LATPOLEA=              -14.953 / [deg] Native latitude of celestial pole

COMMENT  -----------------------------------------------------------------------
COMMENT  This representation without distortions, added by the DSS archive
COMMENT  server, provides a solution tailored to the neighbourhood of the
COMMENT  extracted subimage, which is towards the corner of the plate.
COMMENT  -----------------------------------------------------------------------

WCSNAMEB= 'DSS approximation without distortions computed by archive server'
WCSAXESB=                    2 /GetImage: Number WCS axes
RADESYSB= 'ICRS              ' /GetImage: GSC-II calibration using ICRS system
CTYPE1B = 'RA---TAN          ' /GetImage: RA-Gnomic projection
CRPIX1B =           446.000000 /GetImage: X reference pixel
CRVAL1B =            81.867391 /GetImage: RA of reference pixel
CUNIT1B = 'deg               ' /GetImage: degrees
CTYPE2B = 'DEC--TAN          ' /GetImage: Dec-Gnomic projection
CRPIX2B =           447.000000 /GetImage: Y reference pixel
CRVAL2B =           -12.697383 /GetImage: Dec of reference pixel
CUNIT2B = 'deg               ' /Getimage: degrees
CD1_1B  =        -0.0002802725 /GetImage: rotation matrix coefficient
CD1_2B  =        -0.0000028752 /GetImage: rotation matrix coefficient
CD2_1B  =        -0.0000028067 /GetImage: rotation matrix coefficient
CD2_2B  =         0.0002797643 /GetImage: rotation matrix coefficient

OBJECT  = 'data              ' /GetImage: Requested Object Name
DATAMIN =                 3813 /GetImage: Minimum returned pixel value
DATAMAX =                21724 /GetImage: Maximum returned pixel value
OBJCTRA = '05 27 28.190      ' /GetImage: Requested Right Ascension (J2000)
OBJCTDEC= '-12 41 50.20      ' /GetImage: Requested Declination (J2000)
OBJCTX  =              6943.58 /GetImage: Requested X on plate (pixels)
OBJCTY  =             19566.59 /GetImage: Requested Y on plate (pixels)

END
