; VLANT
;---------------------------------------------------------------
;! applies VLA antenna position corrections from OPs files
;# Task Calibration VLA
;-----------------------------------------------------------------------
;;  Copyright (C) 2007-2009
;;  Associated Universities, Inc. Washington DC, USA.
;;
;;  This program is free software; you can redistribute it and/or
;;  modify it under the terms of the GNU General Public License as
;;  published by the Free Software Foundation; either version 2 of
;;  the License, or (at your option) any later version.
;;
;;  This program is distributed in the hope that it will be useful,
;;  but WITHOUT ANY WARRANTY; without even the implied warranty of
;;  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
;;  GNU General Public License for more details.
;;
;;  You should have received a copy of the GNU General Public
;;  License along with this program; if not, write to the Free
;;  Software Foundation, Inc., 675 Massachusetts Ave, Cambridge,
;;  MA 02139, USA.
;;
;;  Correspondence concerning AIPS should be addressed as follows:
;;         Internet email: aipsmail@nrao.edu.
;;         Postal address: AIPS Project Office
;;                         National Radio Astronomy Observatory
;;                         520 Edgemont Road
;;                         Charlottesville, VA 22903-2475 USA
;-----------------------------------------------------------------------
VLANT     LLLLLLLLLLLLUUUUUUUUUUUU CCCCCCCCCCCCCCCCCCCCCCCCCCCCC
VLANT    Task to apply VLA antenna position corrections from OPs
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 #
SUBARRAY          0.0              Input subarray = AN file
GAINVER                            Input CL table 0=>high
----------------------------------------------------------------
VLANT
Task:  This task determines the antenna position corrections applied
       by the VLA operations staff after your observation that apply
       to that observation.  It copies an input CL table and applies
       these antenna position corrections to the antenna phases.

       WARNING: THIS TASK WILL CHANGE THE ANTENNA TABLE.  Careful
       observers might wish to make a copy of the AN table (e.g. with
       TASAV) before running VLANT.

       This task works with data from the VLA Correlator only.  It is
       anticipated that we will have a similar system for data from
       the EVLA correlator and that will also use this task.  That
       system has not been established at present although the task
       contains rudiments of it.
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.
  SUBARRAY...Which subarray to correct.  This selects the AN table
             that will be considered and updated.
  GAINVER....Input CL table version. If GAINVER is equal zero or
             greater than the total number of the CL tables
             then GAINVER is equal to the last existing CL table.
             A new CL table will always be created if any corrections
             are made.
----------------------------------------------------------------