; DIFUV
;---------------------------------------------------------------
;! Outputs the difference of two matching input uv data sets
;# TASK UV SINGLEDISH MODELING
;-----------------------------------------------------------------------
;;  Copyright (C) 1996-1997
;;  Associated Universities, Inc. Washington DC, USA.
;;  Eric W. Greisen
;;
;;  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
;-----------------------------------------------------------------------
DIFUV     LLLLLLLLLLLLUUUUUUUUUUUU CCCCCCCCCCCCCCCCCCCCCCCCCCCCC
DIFUV     Task to difference two matching uv data sets
INNAME                             1st input UV file name
INCLASS                            1st UV file class
INSEQ             0.0     9999.0   1st UV file seq. #
INDISK            0.0        9.0   1st UV file disk #
IN2NAME                            2nd UV file name.
IN2CLASS                           2nd UV file class.
IN2SEQ            0.0     9999.0   2nd UV file seq. #
IN2DISK           0.0        9.0   2nd UV file disk #
OUTNAME                            Output UV file name
OUTCLASS                           Output UV file class
OUTSEQ           -1.0     9999.0   Output UV file seq. #
OUTDISK           0.0        9.0   Output UV file disk #.
SOLINT            0.0              How close times must match in
                                   minutes
----------------------------------------------------------------
DIFUV
Task:  This task writes out the difference of two UV data sets.  It does
       very little checking to see if they match.  One purpose of this
       task would be to difference the two throws of beam-switched
       single-dish continuum data.  Another use would be to subtract a
       residual uv data set from the original to produce a model uv data
       set.

Adverbs:
  INNAME.....First input UV file name (name).      Standard defaults.
  INCLASS....First input UV file name (class).     Standard defaults.
  INSEQ......First input UV file name (seq. #).    0 => highest.
  INDISK.....First input UV file Disk drive #   .  0 => any.
  IN2NAME....2nd UV file name.
  IN2CLASS...2nd UV file class
  IN2SEQ.....2nd UV file sequence number.
  IN2DISK....2nd UV file sequence number.
  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....Disk drive # of output UV file. 0 => highest with
             space for the file.
  SOLINT.....Data are differenced only if times are close.  SOLINT sets
             that limit in minutes. 0 => 0.01 sec.
----------------------------------------------------------------
