AIPS NRAO AIPS HELP file for FGCNT in 31DEC24



As of Mon Jul 15 19:27:36 2024


FGCNT: counts samples flagged to compare two flag tables

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 #
SOURCES                            Source name
QUAL            -10.0              Calibrator qualifier -1=>all
CALCODE                            Calibrator code '    '=>all
STOKES                             Stokes of output
TIMERANG                           Time range to use
SELBAND                            Bandwidth to select (kHz)
SELFREQ                            Frequency to select (MHz)
FREQID                             Freq. ID to select.
ANTENNAS                           Antennas to copy 0=>all
BASELINE                           Baselines with ANTENNAS
SUBARRAY          0.0     1000.0   Sub-array, 0=>all
BIF                                Low IF number to do
EIF                                Highest IF number to do
BCHAN             0.0              First channel included
ECHAN             0.0              last channel included
DOCALIB          -1.0      101.0   > 0 calibrate data & weights
                                   > 99 do NOT calibrate weights
GAINUSE                            CL (or SN) table to apply
DOPOL            -1.0       10.0   If >0.5 correct polarization.
PDVER                              PD table to apply (DOPOL>0)
BLVER                              BL table to apply.
FLAGVER                            Flag table version for before
                                   0 -> -1
IN2VERS                            Flag table version for after
                                   <= 0 -> detailed count
DOBAND           -1.0       10.0   If >0.5 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.
DOACOR                             Include autocorrelations?
OPTYPE                             ' ' list by source, IF, pol.
                                          and channel if only 1
                                   'ANTE' list by source, pol.,
                                          and antenna (not IF)
                                   'ANIF' list by source, pol.,
                                          antenna and IF
                                   'ANCH' full detail only for
                                          IN2VERS = 0 (only 1)
PRTLEV                             0 -> channels only when
                                        flagged
                                   1 -> all channels
NIF                                IF for special output
CHANNEL                            Spectral channel for special
REFANT                             Antenna for special 0 -> all
OUTFILE                            Text file for special output
BADDISK                            Disks to avoid for scratch

HELP SECTION

FGCNT
Task:  This task applies the calibration and flagging software to a
       data set and counts the samples under a "before" flag table
       (FLAGVER, default none) and, optionally, an "after" flag
       table (IN2VERS, 0 -> none).  It then prints the number of
       correlations found by polarization, IF, and source showing
       percentage lost or lost between the two flag tables.
       Displays that separate counts by antenna are also available.

       If IN2VERS is <= 0, a detailed count including by spectral
       channel is done instead.  If FLAGVER, DOCALIB, and DOBAND are
       all < 0, the count is done with direct I/O of the data set
       which will include fully flagged samples.  If any of these
       are >= 0, the count uses the calibration and flagging software
       and will not include fully flagged samples.  In this mode,
       BCHAN, ECHAN, STOKES, and ANTENNAS are used to limit the
       display of the results but all Stokes and antennas are used
       in the computation.  BASLINE is ignored.  In this mode, there
       are two columns labeled "# flagged".  The first is based on
       difference between the maximum count and each individual
       count.  The second is a count if the flagged data seen by
       the counting routine.  The first column assumes that every
       channel, IF, antenna, and Stokes should have the same number
       of samples.  This is not always the case.
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....Source to be copied.   '  '=> all; if any starts with a
             '-' then all except ANY source named.
  QUAL.......Qualifier of source to be copied. -1 => all.
  CALCODE....Calibrator code of sources to copy. ' '=> all.
  STOKES.....Specifies which STOKES parameters are written in the
             output data set:  ' ' => 'FULL'
               'I','Q','U','V', 'IV', 'IQU', 'IQUV'
               'RR','LL', 'RL', 'LR', 'RRLL', 'RLLR', 'RLRL'
               'VV','HH', 'VH', 'HV', 'VVHH', 'VHHV', 'VHVH'
             'HALF', 'CROS', and 'FULL' have sensible interpretations
             depending on the Stokes present in the data.  The last in
             each of the 3 rows above == 'FULL'.  Note that many
             combinations of polarizations in the input and values
             above are not supported.
  TIMERANG...Time range of the data to be copied. In order: Start day,
             hour, min. sec, end day, hour, min. sec. Days relative to
             ref. date.
  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
             override that of FREQID.  However, setting SELBAND and
             SELFREQ may result in an ambiguity.  In that case, the task
             will request that you use FREQID.
  ANTENNAS...A list of the antennas to be copied.  All 0 => all.
             If any number is negative then all antennas listed are NOT
             to be copied and all others are.
  BASELINE...Baselines between antennas named in ANTENNAS and those
             named in BASELINE are selected..  There are four possible
             combinations of ANTENNAS and BASELINE:
             1. ANTENNAS = 0; BASELINE = 0.
                All possible baselines are selected.
             2. ANTENNAS <>0; BASELINE = 0.
                a)All ANTENNAS > 0
                  Baselines including an antenna in the ANTENNAS list
                  are selected;
                b)Some ANTENNAS < 0
                  All baselines NOT including an antenna in the ANTENNAS
                  list are selected;
             3. ANTENNAS = 0; BASELINE <> 0.
                a)All BASELINE > 0
                  Baselines including an antenna in the BASELINE list
                  are selected;
                b)Some BASELINE < 0
                  All baselines NOT including an antenna in the BASELINE
                  list are selected;
             4. ANTENNAS <> 0; BASELINE <> 0.
                a)All ANTENNAS>0 and all BASELINE>0
                  Baselines between antennas named in ANTENNAS and those
                  named in BASELINE are selected.
                b)Some ANTENNAS<0 .OR. some BASELINE<0
                  Baselines between antennas named in ANTENNAS  and
                  those named in BASELINE are DE-selected, all others
                  are selected.
  SUBARRAY...Sub-array number to copy. 0=>all.
  BIF........First IF to include.  0 -> 1.
  EIF........Last IF to include.   0 -> max.
  BCHAN......First channel to copy. 0=>all.
  ECHAN......Highest channel to copy. 0=>all higher than BCHAN
  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.
  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....specifies the version of the flagging table to be applied
             in the "before" count.  <= 0 => no flagging "before"
  IN2VERS....specifies the version of the flagging table to be applied
             in the "after" count.  <= 0 => max version "after"
  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.
             IMAGR uses DOBAND as the nearest integer; 0.1 is therefore
             "false".
  BPVER......Specifies the version of the BP table to be applied
                0 => highest numbered table.
               <0 => no bandpass correction to be applied.
  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).
  DOACOR.....> 0 => include autocorrelations as well as cross
             correlation data.
  OPTYPE.....'ANIF' => list by source, antenna, IF, and polarization
             'ANTE' => list by source, antenna, and polarization (IFs
                       summed)
             else   => list by source, IF, and polarization (antennas
                       summed).  If IN2VERS <= 0, spectral channels
                       are also listed
             'ANCH' => list by source, IF, polarization, spectral
                       channel, and antenna
  PRTLEV.....0 => list spectral channels (IN2VERS <= 0) only when
                  there are flags
             1 => list all spectral channels
  NIF........IF number for special text output listing one spectral
             channel in detail
  CHANNEL....Channel number for this special output
  REFANT.....Antenna number for this special output (0 -> all)
  OUTFILE....Text file for special output which is done only when
             NIF and CHANNEL are > 0 and OUTFILE is not blank
  BADDISK....The disk numbers to avoid for scratch files (sorting
             tables mostly).

EXPLAIN SECTION


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