AIPS HELP file for CHANSEL in 31DEC22
As of Thu Jun 1 9:29:34 2023
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.
See ICHANSEL for IF-dependent channel selection.
ATLOD.....Reads ATCA data in RPFITS format into AIPS. CHANSEL
selects which spectral channels are loaded. 0 -> all
BSCAN.....Seeks best scan to use for phase cal, fringe search, ...
CHANSEL is an output adverb giving start/stop times and
number of antennas in each group found.
OTFUV.....Translates on-the-fly single-dish SDD format to AIPS UV
file. CHANSEL specifies channels to be flagged on input.
SDLSF.....Least squares fit to channels and subtracts from SD uv
data. CHANSEL selects channels to be fit.
SERCH.....Finds line signals in transposed data cube. CHANSEL sets
line search regions.
UJOIN.....Modifies UV data converting IFs to spectral channels.
CHANSEL selects channels to use for up to 10 IFs.