[daip] aips_gripe
Lincoln Greenhill
lincoln at rglinux2.harvard.edu
Thu Sep 20 18:24:45 EDT 2001
{20-SEP-2001 17:33:52}
{rglinux2 rglinux2}
{ 24 31DEC01 LINX}
{lincoln greenhill}
{cfa}
{617 495 7194}
{I believe that CLCOR corrections to the SU table for opcode ANTP are
not correctly implemented.
Example: Original coordinates: 05 35 14.5098 -5 22 30.482
CLCORPRM 0 0 0 0 +0.0231 +0.017
New SU table entry: 05 35 14.4953 -5 22 30.426
I admit that there is something here I do not understand...I have
used TABGET to read the real*8 entries in the SU table (cols. 11 & 12)
and I do not obtain the coordinates listed by LISTR in hhmmss or dddmmss
format.
However, I am sure that the CLCORPRM entries do not add up to the values
placed in the SU table. I note that the CLCORPRM entries I have specified
are angular offsets on the sky, in arcsec. The expected new coordinates
should be 05 35 24.14.5110 -5 22 30.4650 where I have accounted for
precession and nutation in the J2000 frame. At minimum, the sign of the
change in RA is wrong.
}
{CLCOR corrections to SU tbl for ANTP seem to be incorrect.}
{greenhill at cfa.harvard.edu}
{ }
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