AIPS HELP file for BLPOLCAL in 31DEC24
As of Mon Apr 29 3:07:18 2024
BLPOLCAL: Procedure for spectral BLCAL for I, Q, U, V models
INPUTS
INNAME Input UV data name (name)
INCLASS Input UV data name (class)
INSEQ 0.0 9999.0 Input UV data name (seq. #)
INDISK 0.0 9.0 Input UV data disk unit #
IN2NAME Input I model name (name)
IN2CLASS Input I model name (class)
IN2SEQ 0.0 9999.0 Input I model name (seq. #)
IN2DISK 0.0 9.0 Input I model disk unit #
IN3NAME Input Q model name (name)
IN3CLASS Input Q model name (class)
IN3SEQ 0.0 9999.0 Input Q model name (seq. #)
IN3DISK 0.0 9.0 Input Q model disk unit #
IN4NAME Input U model name (name)
IN4CLASS Input U model name (class)
IN4SEQ 0.0 9999.0 Input U model name (seq. #)
IN4DISK 0.0 9.0 Input U model disk unit #
IN5NAME Input V model UV (name)
IN5CLASS Input V model UV (class)
IN5SEQ 0.0 9999.0 Input V model UV (seq. #)
IN5DISK 0.0 9.0 Input V model disk unit #
SRCNAME Source to calibrate with
SUBARRAY 0.0 1000.0 Subarray, 0=>1
Cal. info for input:
DOCALIB -1.0 101.0 > 0 calibrate data & weights
> 99 do NOT calibrate weights
GAINUSE CAL table to apply.
CLEAN map (optional)
FLAGVER Flag table version
DOBAND -1.0 10.0 If >0 apply bandpass cal.
Method used depends on value
of DOBAND (see HELP file).
BPVER Bandpass table version
DOPOL -1.0 10.0 If >0 correct polarization.
PDVER PD table to apply (DOPOL>0)
SMOOTH Smoothing function. See
HELP SMOOTH for details.
OUTVERS Output BD table version
<0 -> none, 0 -> new
OUTNAME Output UV data name (name)
OUTCLASS Output UV data name (class)
OUTSEQ Output UV data name (seq)
OUTDISK Output UV data disk unit #
BADDISK Disk to avoid for scratch
P_DEBUG > 0 -> inquire at each task
< 0 -> delete temp files
HELP SECTION
BLPOLCAL
Procedure: It makes matching model data sets in I, Q, U, and,
optionally, V polarization with SPLIT and UVSUB. Then it
divides a circular polarization model into the RR/LL/RL/LR
input data and solves for the time average. It applies
these baseline-polarization-channel multiplicative
corrections to the input data and saves them in a BD table.
The input images should contain Clean Component files for
computing the Stokes model visibilities.
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.
IN2NAME....Input I image name (name). Standard defaults.
IN2CLASS...Input I image name (class). Standard defaults.
IN2SEQ.....Input I image name (seq. #). 0 => highest.
IN2DISK....Disk drive # of input I image. 0 => any.
IN3NAME....Input Q image name (name). Standard defaults.
IN3CLASS...Input Q image name (class). Standard defaults.
IN3SEQ.....Input Q image name (seq. #). 0 => highest.
IN3DISK....Disk drive # of input Q image. 0 => any.
IN4NAME....Input U image name (name). Standard defaults.
IN4CLASS...Input U image name (class). Standard defaults.
IN4SEQ.....Input U image name (seq. #). 0 => highest.
IN4DISK....Disk drive # of input U image. 0 => any.
IN5NAME....Input V UV model name (name). Standard defaults.
only if not blank
IN5CLASS...Input V UV model name (class). Standard defaults.
IN5SEQ.....Input V UV model name (seq. #). 0 => highest.
IN5DISK....Disk drive # of input V UV model. 0 => any.
SRCNAME....Calibration source name. Must specify if INNAME is a
multi-source data set.
SUBARRAY...Subarray number to use. 0 => 1. can only do one at a
time.
DOCALIB....If true (>0), calibrate the data using information in the
specified Cal (CL) table for multi-source or SN table for
single-source data. Also calibrate the weights unless
DOCALIB > 99 (use this for old non-physical weights).
GAINUSE....version number of the CL table to apply to
multi source files or the SN table for single
source files. 0 => highest.
FLAGVER....Specifies the version of the flagging table to be
applied. 0 => highest numbered table. <0 => no flagging
to be applied.
DOBAND.....If true (>0) then correct the data for the shape of the
antenna bandpasses using the BP table specified by BPVER.
The correction has five modes:
(a) if DOBAND=1 all entries for an antenna in the table
are averaged together before correcting the data.
(b) if DOBAND=2 the entry nearest in time (including
solution weights) is used to correct the data.
(c) if DOBAND=3 the table entries are interpolated in
time (using solution weights) and the data are then
corrected.
(d) if DOBAND=4 the entry nearest in time (ignoring
solution weights) is used to correct the data.
(e) if DOBAND=5 the table entries are interpolated in
time (ignoring solution weights) and the data are then
corrected.
BPVER......Specifies the version of the BP table to be applied if
DOBAND > 0. 0 => highest numbered table.
<0 => no bandpass correction to be applied.
BADDISK....Disk drives to avoid for scratch files.
DOPOL......If > 0 then correct data for instrumental polarization as
represented in the AN or PD table. This correction is
only useful if PCAL has been run or feed polarization
parameters have been otherwise obtained. See HELP DOPOL
for available correction modes: 1 is normal, 2 and 3 are
for VLBI. 1-3 use a PD table if available; 6, 7, 8 are
the same but use the AN (continuum solution) even if a PD
table is present.
PDVER......PD table to apply if PCAL was run with SPECTRAL true and
0 < DOPOL < 6. <= 0 => highest.
SMOOTH.....Specifies the type of spectral smoothing to be applied to
a uv database . The default is not to apply any smoothing.
The elements of SMOOTH are as follows:
SMOOTH(1) = type of smoothing to apply: 0 => no smoothing
To smooth before applying bandpass calibration
1 => Hanning, 2 => Gaussian, 3 => Boxcar, 4 => Sinc
To smooth after applying bandpass calibration
5 => Hanning, 6 => Gaussian, 7 => Boxcar, 8 => Sinc
SMOOTH(2) = the "diameter" of the function, i.e. width
between first nulls of Hanning triangle and sinc
function, FWHM of Gaussian, width of Boxcar. Defaults
(if < 0.1) are 4, 2, 2 and 3 channels for SMOOTH(1) =
1 - 4 and 5 - 8, resp.
SMOOTH(3) = the diameter over which the convolving
function has value - in channels. Defaults: 1,3,1,4
times SMOOTH(2) used when input SMOOTH(3) < net
SMOOTH(2).
OUTVERS....BD table output version. <0 => do not write one.
0 => write a new one. = N > 0 => add to version N.
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 w room
P_DEBUG....> 0 => show the inputs for each task before running the
task and ask if you want to stop (answer 0) or
simply go on (anything else)
< 0 => Clean out all data sets made during the procedure.
EXPLAIN SECTION