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

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

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