; TYAPL
;---------------------------------------------------------------
;! undoes and re-does nominal sensitivity application
;# Task Calibration VLA
;-----------------------------------------------------------------------
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;;  Associated Universities, Inc. Washington DC, USA.
;;
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;;
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;-----------------------------------------------------------------------
TYAPL     LLLLLLLLLLLLUUUUUUUUUUUU CCCCCCCCCCCCCCCCCCCCCCCCCCCCC
TYAPL     Task which smooths/filters system temperature tables
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 #
FREQID            0.0              Frequency ID number:  0 -> 1
SUBARRAY          0.0              Subarray: 0 -> 1
INVERS                             Input TY table undo  0=>none
IN2VERS                            Input TY table redo  0=>none
OUTNAME                            Output UV file name (name)
OUTCLASS                           Output UV file name (class)
OUTSEQ                             Output UV file name (seq #)
OUTDISK                            Output UV file disk unit
----------------------------------------------------------------
TYAPL
Task: For the VLA, Tsys is the nominal sensitivity and Tant is some
      form of system temperature.  FILLM, by default, scales the
      measured correlation coefficients by the instantaneous measured
      nominal sensitivities, producing data appriximately in deci-Jy.
      FILLM can be told to load correlation coefficients only.  For
      calibration purposes, it is best to have the nominal
      sensitivites applied, but it may be better to use a clipped and
      time-smoothed version of those sensitivities.  TYSMO allows you
      to do that clipping and smoothing or, if you prefer interactive
      tasks, try SNEDT.  Then one can remove the nominal sensitivities
      applied by FILLM, if any, and apply smoothed nominal
      sensitivites (or leave the data as correlation coefficients if
      desired) with TYAPL.

      VLBI users warning: This task is not elaborately intelligent
      about looking through the TY table to match up Tsys measurements
      by source and time.  It is tested for and assumes the simple,
      all antennas at the same time and source form for the TY tables
      of the VLA.
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.
  FREQID.....Frequency ID number to do       0 => 1
  SUBARRY....Subarray to do                  0 => 1
  INVERS.....Input version number of the TY table which was applied to
             the data and is to be unapplied.  0 => none
             If input file is in correlation coefficient form, it is
             an error to set INVERS > 0.
  IN2VERS....Input version number of the TY table that is to be
             applied after INVERS is undone.   0 => none
             If the data are not in correlation coefficient form on
             input or after INVERS is undone, then it is an error to
             set IN2VERS > 0.
             If INVERS <= 0 and IN2VERS <= 0, then the program will
             set IN2VERS to max TY version if the data are correlation
             coefficients and INVERS to max TY version if the data are
             in visibility form, leaving the other at 0.
  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....Output UV file disk unit.     0 => highest w space.
----------------------------------------------------------------