AIPS HELP file for FQCENTER in 31DEC18
As of Sun Jul 22 0:18:06 2018
Type: Adverb (Logical, > 0 => true)
Use: If True, make the output frequency axis of a UV data set be
referenced to the frequency channel Nchan/2 + 1 of IF 1.
If False, leave the frequency reference pixel unchanged, or
change it to pixel 1.0.
Null Value: true (1)
Many tasks which copy data have this option. A frequency reference
change requires both a simple change in the UV data set header and
a scaling of the U,V,W values of each sample by the ratio of the
new to old reference frequencies.