AIPS HELP file for AXVAL in 31DEC22
As of Tue May 30 17:57:32 2023
Type: Adverb (array(2))
Use: To specify the value of the coordinate at the reference pixel on a
specified axis. FITS standard units are mks with degrees and Jy
added. AXVAL is an array to allow greater precision in the
specified value. The axis value is taken to be AXVAL(1) +
AXVAL(2) with both values converted to double precision before
adding. For example, the frequency 1.420405752E6 is too precise
for a single adverb. However, AXVAL = 1.4204E6, 5752. will
convey the desired value correctly. NOTE, if AXVAL(1) = AXVAL(2),
then the axis value is taken to be just AXVAL(1).
Null value: none
ALTDEF........Sets frequency vs velocity relationship into image
header. AXVAL is the reference pixel velocity in
AXDEFINE......Define or modify an image axis description.
AXVAL must be specified.
PLAYR.........Task to load one or two images and play with them on the
TV. AXVAL is used as the intensity display range for
the second input image (if any).