AIPS HELP file for UVHIM in 31DEC22
As of Tue Jul 5 5:47:45 2022
UVHIM: Task to produce histogram images summarizing uv data.
INNAME uv name
INCLASS uv class
INSEQ 0.0 9999.0 uv sequence number
INDISK 0.0 9.0 uv disk number
SOURCES Sources to plot, ' '=>all.
QUAL -10.0 Qualifier -1=>all
CALCODE Calibrator code ' '=>all
STOKES Stokes type to select.
SELBAND Bandwidth to select (kHz)
SELFREQ Frequency to select (MHz)
FREQID Freq. ID to select.
TIMERANG Time range to select
ANTENNAS Antennas to plot
BASELINE Baselines with ANTENNAS
UVRANGE UV range in kilolambda.
SUBARRAY 0.0 1000.0 Subarray, 0 => all
BCHAN 0.0 4096.0 1st spectral channel #
ECHAN 0.0 4096.0 Last spectral channel #
CHINC 0.0 4096.0 Increment in channel #
BIF Low IF number to plot
EIF Highest IF number to plot
DOCALIB -1.0 101.0 > 0 calibrate data & weights
> 99 do NOT calibrate weights
GAINUSE CAL (CL or SN) table to apply
DOPOL -1.0 10.0 If >0 correct polarization.
PDVER PD table to apply (DOPOL>0)
BLVER BL table to apply.
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
SMOOTH Smoothing function. See
HELP SMOOTH for details.
IMSIZE output image size
OUTNAME Output file name
OUTCLASS Output file class
OUTSEQ 0.0 Output file sequence number
OUTDISK 0.0 Output file disk
BPARM (1,2) axis types
(3) fixed scale?
(4,5) X min,max
(6,7) Y min max
(8) Conv func support radius
(9) Conv func type
DOBLANK -1.0 1.0 > 0 => blank all 0 pixels
BADDISK Disks to avoid for scratch
Use: UVHIM produces an image of a two-dimensional histogram which
summarizes the content of a uv data set.
INNAME......uv name, Standard defaults.
INCLASS.....uv class, Standard defaults.
INSEQ.......uv sequence number, 0 -> highest.
INDISK......uv disk number, 0 -> any.
SOURCES....List of sources to be plotted. ' '=> all; if any starts
with a '-' then all except ANY source named.
QUAL.......Qualifier of source to be plotted. -1 => all.
CALCODE....Calibrator code of sources to plot. ' '=> all.
STOKES.....The desired Stokes type of the plotted data:
default usually FULL which will plot RR, LL, RL, and LR
all added into the same plot. Use 'HALF' or 'RRLL' or
'I' to examine only parallel-hand data.
SELBAND....Bandwidth of data to be selected. If more than one IF is
present SELBAND is the width of the first IF required.
Units = kHz. For data which contain multiple bandwidths or
frequencies the task will insist that some form of
selection be made by frequency or bandwidth.
SELFREQ....Frequency of data to be selected. If more than one IF is
present SELFREQ is the frequency of the first IF required.
Units = MHz.
FREQID.....Frequency identifier to select (you may determine which is
applicable from the OPTYPE='SCAN' listing produced by
LISTR). If either SELBAND or SELFREQ are set, their values
overide that of FREQID. However, setting SELBAND and
SELFREQ may result in an ambiguity. In that case, the task
will request that you use FREQID. If all SELBAND, SELFREQ
and FREQID are not specified (<= 0) then the task will loop
over the frequency ID plotting all of them!
TIMERANG...Time range of the data to be plotted. In order:
Start day, hour, min. sec, end day, hour, min. sec.
Days relative to reference date.
ANTENNAS...A list of the antennas to plot. If any number is negative
then all antennas listed are NOT desired and all others
are. All 0 => list all.
BASELINE...Baselines are specified using BASELINE.
Eg. for baselines 1-6,1-8, 2-6 and 2-8
use ANTENNAS=1,2; BASELINE=6,8.
UVRANGE....Range of projected spacings to be plotted in 1000's of
wavelengths. 0 => 1, 1.E10
SUBARRAY...Subarray number to plot. 0 => all - the task will
loop over subarray number.
BCHAN......Beginning spectral line channel number. 0 => 1.
ECHAN......Ending spectral line channel number. 0 => max.
CHINC......Increment in spectral line channel number. 0 => 1.
BIF........First IF number to plot. 0 => 1
EIF........Last IF number to plot. 0 => highest
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 Cal. table to apply to the data if
DOCALIB=1. Refers to a CL table for multi-source data or
an SN table for single-source. 0 => highest.
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.
BLVER......Version number of the baseline based calibration (BL) table
to apply. <0 => apply no BL table, 0 => highest, if any.
FLAGVER....Specifies the version of the flagging table to be applied.
0 => highest numbered table. <0 => no flagging to be
DOBAND.....(multi-source) 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
(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
BPVER......(multi-source) specifies the version of the BP table to be
applied. 0 => highest numbered table.
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
OUTNAME.....The output image name; standard defaults.
OUTCLASS....The output image class; standard defaults.
OUTSEQ......The output image seq. #. 0 => highest unique.
OUTDISK.....The output disk drive no. 0 => highest with space.
IMSIZE......Output image size in pixels: 0 => 256.
(1) Code for parameter along X axis
(2) Code for parameter on Y axis: choices are
1: visibility real part
2: visibility imaginary part
3: visibility amplitude part
4: visibility phase part
5: visibility weight part
7: baseline length [sqrt (u*u+v*v)]
8: baseline position angle
12: v - but in u-v plots, plot both hermitian points
(3) > 0 => Fixed scale or range on X and Y axes
(4,5) X axis min, max: if BPARM(4)<BPARM(5) then
use fixed scale, if BPARM(4)>BPARM(5) then use self
scale but not outside the range BPARM(5) to BPARM(4)
and if BPARM(4)=BPARM(5) then self scale
(6,7) Y axis min, max: if BPARM(6)<BPARM(7) then
use fixed scale, if BPARM(6)>BPARM(7) then use self
scale but not outside the range BPARM(7) to BPARM(6)
and if BPARM(6)=BPARM(7) then self scale.
(8) Support radius in pixels over which a sample is
counted. 0 -> 0.5
(9) Function used when counting sample: 0 => -1
1 : Circular pillbox
2 : Circular linear (Hanning like)
3 : Circular exponential
4 : Circular Gaussian
-1 : Rectangular pillbox
-2 : Rectangular linear (Hanning like)
-3 : Rectangular exponential
-4 : Rectangular Gaussian
DOBLANK.....> 0 => convert all pixels that have count 0 to blanks.
BADDISK....The disk numbers to avoid for scratch files (sorting