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diff --git a/doc/source/npol_append.rst b/doc/source/npol_append.rst new file mode 100644 index 0000000..5482745 --- /dev/null +++ b/doc/source/npol_append.rst @@ -0,0 +1,36 @@ +Appendix +======== + +Sample WCSDVARR extension header:: + + XTENSION= 'IMAGE ' / Image extension + BITPIX = -32 / array data type + NAXIS = 2 / number of array dimensions + NAXIS1 = 65 + NAXIS2 = 33 + PCOUNT = 0 / number of parameters + GCOUNT = 1 / number of groups + EXTVER = 1 / Distortion array version number + EXTNAME = 'WCSDVARR' / WCS distortion array + CRVAL2 = 0.0 / Coordinate system value at reference pixel + CRPIX1 = 0.0 / Coordinate system reference pixel + CRPIX2 = 0.0 / Coordinate system reference pixel + CRVAL1 = 0.0 / Coordinate system value at reference pixel + CDELT1 = 64 / Coordinate increment along axis + CDELT2 = 64 / Coordinate increment along axis + + +Sample science extension keywords defining a lookup table distortions:: + + CPERROR1= 0.058602706 / Maximum error of dgeo correction for axis 1 + CPDIS1 = 'Lookup ' / Prior distortion function type + DP1 = 'EXTVER: 1.0' / Version number of WCSDVARR extension containing + DP1 = 'NAXES: 2.0' / Number of independent variables in distortion f + DP1 = 'AXIS.1: 1.0' / Axis number of the jth independent variable in + DP1 = 'AXIS.2: 2.0' / Axis number of the jth independent variable in + CPERROR2= 0.072911568 / Maximum error of dgeo correction for axis 2 + CPDIS2 = 'Lookup ' / Prior distortion function type + DP2 = 'EXTVER: 2.0' / Version number of WCSDVARR extension containing + DP2 = 'NAXES: 2.0' / Number of independent variables in distortion f + DP2 = 'AXIS.1: 1.0' / Axis number of the jth independent variable in + DP2 = 'AXIS.2: 2.0' / Axis number of the jth independent variable in |