World Coordinate System Keywords
The following keywords are used by the FITS World Coordinate System ("WCS") protocol. The values for these keywords may be listed using the WCS Keywords command. Some keywords use a number suffix to constitute a series, such as 20 keywords in the series AMDX1 through AMDX20, or a 6x6 matrix of keywords in the series PC001001 through PC006006.
FITS WCS Keywords
CTYPE1 CTYPE2 CRVAL1 CRVAL2 CDELT1 CDELT2 CRPIX1 CRPIX2 CROTA1 CROTA2 |
IMWCS CD1_1 CD1_2 CD2_1 CD2_2 WRA RA WDEC DEC EPOCH |
WEPOCH MJD-OBS EQUINOX WEQUINOX RADECSYS SECPIX SECPIX1 SECPIX2 LONGPOLE LATPOLE |
WCS_DSS RA---DSS DEC--DSS PLTRAH PLTRAM PLTRAS PLTDECSN PLTDECD PLTDECM PLTDECS |
CNPIX1 CNPIX2 PIXSCALE PIXSCAL1 PIXSCAL2 PLTSCALE XPIXELSZ YPIXELSZ |
PROJR0 PROJP1 ... PROJP10 PPO1 ... PPO6 AMDX1 ... AMDX20 AMDY1 ... AMDY20 CO1_1 ... CO1_13 CO2_1 ... CO2_13 PC001001 ... PC006006 |
World Coordinate System, WCS Keywords, FITS Header, FITS Keywords