Setting the Rest Frequency

The rest frequency of a line may sometimes need to be set or corrected (e.g. you forgot to enter it in atlod, or the FITS file failed to contain this information). This can be done with puthd.

PUTHD
in=line.uv/restfreq	Set the parameter restfreq of
	dataset line.uv
value=1.420405752d0	Rest frequency, in GHz. Express it as
	a double precision number.