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wcs - World Coordinate Systems
wcs [parameter=value]
wcs
is the World Coordinate System.
Polarization is an exceptional
case, since it’s enumerated (XX, YY, LL, etc.), but the community has assigned
integer values such that a usual NAXIS,CRPIX,CRVAL,CDELT,CTYPE can be used.
This is the AIPS/FITS convention.
1 I Standard Stoked Unpolarized
2 Q
3 U
4 V
-1 RR Right-right circular
-2 LL
-3 RL
-4 LR
-5 XX X parallel linear
-6 YY
-7 XY
-8 YX
wcs(1NEMO)
, worldpos(3NEMO)
, ccdsky(1NEMO)
, ccdfits(1NEMO)
, impos(1MIRIAD)
,
xy2sky(1WCSTOOLS)
, sky2xy(1WCSTOOLS)
Peter Teuben
15-dec-2019 written PJT
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