[daip] FITLD trouble with HST image.

[Eric Greisen]

R. Craig Walker writes:
 > I have a processed HST image that I once loaded into AIPS, I think (I have
 > AIPS images derived from it), but that will not load now.  The messages
 > after the temporary file is created are:
 > 
 > FITLD1: IMPARS: BAD NUMBER ON EQUINOX
 > FITLD1: TABHDR: NUMBER OUT OF RANGE ON CRVAL1
 > FITLD1: ERROR      1 RETURNED FROM IMGTAP

        Changed FITLD and IMLOID to continue even if there are gross
errors in keyword values - in this case a table header has keywords
like CRVAL1 set to a long string to say what it is.

Eric Greisen

 > 
 > 
 > Looking at the FITS header with less, CRVAL1 looks reasonable (68.29....)
 > which is what it should be.
 > I don't see an Equinox specification until fairly far down the header
 > (under EXPOSURE INFORMATION), but it is there.
 > 
 > The image is rotated -65.3... degrees from the normal celestial coordinates.
 > 
 > Instead of CDELT values, this image has CD1_1 (-5.28E-6), CD1_2 (-1.14E-5),
 > CD2_1 (-1.14E-5), and CD2_2 (5.278E-6) (I did not give the numbers to their
 > full precision).  Note that CD1_1 is not quite equal to -CD2_2 and CD1_2
 > is not quite CD2_1.
 > 
 > If you need more, I can provide the image.
 > 
 > Cheers,
 > 
 > Craig
 > 
 > 
 > ---------------------------------------------------------------------
 >     R. Craig Walker            Array Operations Center
 >     cwalker at nrao.edu           National Radio Astronomy Observatory
 >     Phone  505 835 7247        P. O. Box O
 >     Fax    505 835 7027        Socorro NM 87801   USA
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 > 
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