AIPS HELP file for UVWAX in 31DEC24
As of Wed Apr 24 22:18:00 2024
UVWAX: Task which flags points close to the U = 0 and/or V=0
INPUTS
INNAME Input UV file name (name)
INCLASS Input UV file name (class)
INSEQ 0.0 9999.0 Input UV file name (seq. #)
INDISK 0.0 9.0 Input UV file disk unit #
OUTNAME Output UV file name (name)
OUTCLASS Output UV file name (class)
OUTSEQ -1.0 9999.0 Output UV file name (seq. #)
OUTDISK 0.0 9.0 Output UV file disk unit #.
APARM (1) Min U distance flagged
(2) Max U distance flagged
(3) Min V distance flagged
(4) Max V distance flagged
(5) Min W distance flagged
(6) Max W distance flagged
(wavelengths)
HELP SECTION
UVWAX
Task: This task flags UV data which is between APARM(1) and APARM(2)
wavelengths from the U axis and also between APARM(3) and
APARM(4) wavelengths from the V axis. It will also flag data
between APARM(5) and APARM(6) wavelengths from the W axis. The
fringe rate is 0 on the V axis (u = 0), so the rejection by
averaging of unwanted terrestrial signals due to interference
and other bad data, fails near U = 0. In addition to axis
flagging, It can also be used to remove any axisymmetric part
of the UV plane which is undesirable for some other reason.
Flagging large W-values can be useful when the 3-D imaging
problem gets too big for AIPS to handle with fewer then 512
facets (ie by removing large W, you can make fewer, bigger
facets). This is a heavily modified version of UVNOU; contact
Wendy Lane for advice.
Adverbs:
INNAME.....Input UV file name (name). Standard defaults.
INCLASS....Input UV file name (class). Standard defaults.
INSEQ......Input UV file name (seq. #). 0 => highest.
INDISK.....Disk drive # of input UV file. 0 => any.
OUTNAME....Output UV file name (name). Standard defaults.
OUTCLASS...Output UV file name (class). Standard defaults.
OUTSEQ.....Output UV file name (seq. #). 0 => highest unique
OUTDISK....Disk drive # of output UV file. 0 => highest with
space for the file.
APARM......(1) Smallest abs(U) distance flagged (wavelengths)
[ <=0 => defaults to 0 wavelengths]
(2) Largest abs(U) distance flagged (wavelengths)
[ =0 => defaults to 10^30 wavelengths]
(3) Smallest abs(V) distance flagged (wavelengths)
[ <= 0 => defaults to 0 wavelengths]
(4) Largest abs(V) distance flagged (wavelengths)
[ = 0 => defaults to 10^30 wavelengths]
i.e., all data with abs(U) betweem APARM(1) and APARM(2)
AND abs(V) between APARM(3) and APARM(4) will be flagged.
Defaults are to flag U/V values between 0 and
(effectively) infinity.
Optionally you can also flag W:
(5) Smallest abs(W) distance flagged (wavelengths)
[ <= 0 => defaults to 10^30 wavelengths]
(6) Largest abs(W) distance flagged (wavelengths)
[ = 0 => defaults to 10^30 wavelengths]
Note: U, V, W are evaluated only at the reference
frequency; changes of U, V, W with spectral channel or IF
are ignored.
EXPLAIN SECTION