AIPS NRAO AIPS HELP file for UVPRM in 31DEC18



As of Fri Oct 19 12:45:37 2018


UVPRM: Measure UV data parmeters from a u,v data base:

INPUTS

INNAME                             Input UV file name (name)
INCLASS                            Input UV file name (class)
INSEQ             0.0     9999.0   Input UV file name (seq. #)
INDISK                             Input UV file disk unit #
SOURCES                            Sources to measure, ' '=>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 measure
BASELINE                           Baselines with ANTENNAS
UVRANGE                            UV range in kilolambda.
SUBARRAY          0.0     1000.0   Subarray, 0 => all
CHANNEL           0.0     4096.0   Spectral channel #
BIF                                IF number to measure
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.
BPARM                              Control parameters
                                   8 : Number of bins
                                   9 : .ne.0=>list bin values.
FLUX                               Minimum Y axis Value
BADDISK                            Disk to avoid for scratch.

HELP SECTION

UVPRM
Type: Task
Use:  Automatic measurement of u,v data parameters for use as
      input to automatic selfcalibration and mapping procedures.
      (See COMAP).  The Min, Max UVRANGE are returned as header
      keywords UVPRAMIN, and UVPRAMAX.  The zerospacing flux and
      rms are returned via keywords UVPFLUX0 and UVPRMSF0.  The
      Observing time on source (days) is returned in UVPOTIME and
      A reasonable choice for a reference antenna is returned in
      UVPREFAN.  See GETHEAD and IMHEADER for methods of
      accessing header keywords.
         Sub sets of the input UVdata can be selected in the
      standard manner.  The data selection part of the UVPRM task
      is based on AIPS task UVPLT.
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.
  SOURCES....List of sources to be measured. '  '=> all; if any
             starts with a '-' then all except ANY source named.
  QUAL.......Qualifier of source to be measured. -1 => all.
  CALCODE....Calibrator code of sources to measure. ' '=> all.
  STOKES.....The desired Stokes type of the measure data:
               'I','Q','U','V','RR','LL' anything else=>'I'
  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/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 (.le. 0) then all FQ ids
             will be selected.
  TIMERANG...Time range of the data to be measured. In order:
             Start day, hour, min. sec,
             end day, hour, min. sec. Days relative to ref.
             date.
  ANTENNAS...A list of the antennas to measure.  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. baselines 1-6,1-8, 2-6 and 2-8
             use ANTENNAS=1,2; BASELINE=6,8.
  UVRANGE....Range of projected spacings to be measure in 1000's
             of wavelengths.  0  =>  1, 1.E10
  SUBARRAY...Subarray number to measure.     0 => all.
  CHANNEL....Spectral line channel number.   0 => 1.
  BIF........IF number to measure.           0 => 1
  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
             multisource 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.
  FLAGVER....(multisource) specifies the version of the
             flagging table to be applied. 0 => highest
             numbered table.  <0 => no flagging to be applied.
  DOBAND.....(multisource) 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......(multisource) 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
               SMOOTH(2).
  BPARM......Control parameters, 8 : Number of bins for zero-
               spacing and rms measurements.
               9 : .ne.0=>list bin values.
  BADDISK....Disk numbers to avoid for scratch files.  Scratch
             files may be created by the sorting routines if
             calibration or flagging is applied.

EXPLAIN SECTION



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