AIPS HELP file for CHANSEL in 31DEC18
As of Mon Oct 15 11:01:03 2018
Type: Adverb (REAL, 3 elements x 10 rows)
Use: Standard data selection adverb, used to specify a list of
start and stop channel numbers plus an increment to be
averaged to form a pseudo-continuum channel.
Up to 10 sets of channel numbers can be specified. The
first two elements specify the start and stop channel
numbers, the third specifies the increment within that
range, i.e.if CHANSEL = 10,20,2 that means take every
other channel in the range 10 - 20, so that channels
10,12,14,16,18,20 would be averaged together.
Null Value: 0
A null value means use all channels. A null value for the
third element means that the increment is set to 1.
Note that the code assumes CHANSEL(1,n) < CHANSEL(2,n) and
CHANSEL(3,n) <= 0 means use 1.