; BDROP
;---------------------------------------------------------------
;! gives number of pooints dropped at the beginning
;# ADVERB IMAGE-UTIL PLOT
;-----------------------------------------------------------------------
;;  Copyright (C) 1995, 2020
;;  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
;-----------------------------------------------------------------------
;---------------------------------------------------------------
BDROP     LLLLLLLLLLLLUUUUUUUUUUUU CCCCCCCCCCCCCCCCCCCCCCCCCCCCC
----------------------------------------------------------------
BDROP
Type:  Adverb  (real)
Use:   Drop pixels from the beginning of a slice file when
       plotting.
Null value:  none.
Verbs:
   TKAGUESS......Verb to add a plot of the slice model guess directly on
                 TEK.
   TKAMODEL......Verb to add slice model display directly on TEK.
   TKARESID......Verb to add slice model residuals directly on TEK.
   TKASLICE......Verb to add a slice display on TEK from slice file.
   TKGUESS.......Verb to display slice model guess directly on TEK.
   TKMODEL.......Verb to display slice model directly on TEK.
   TKRESID.......Verb to display slice model residuals directly on TEK.
   TKSLICE.......Verb to display slice file directly on TEK.
   TVACOMPS......Verb to add slice model components directly on TV
                 graphics.
   TVAGUESS......Verb to re-plot slice model guess directly on TV
                 graphics.
   TVAMODEL......Verb to add slice model display directly on TV graphics.
   TVARESID......Verb to add slice model residuals directly on TV
                 graphics.
   TVASLICE......Verb to add a slice display on TV graphics from slice
                 file.
   TVCOMPS.......Verb to display slice model components directly on TV
                 graphics.
   TVGUESS.......Verb to display slice model guess directly on TV
                 graphics.
   TVMODEL.......Verb to display slice model directly on TV graphics.
   TVRESID.......Verb to display slice model residuals directly on TV
                 graphics.
   TVSLICE.......Verb to display slice file directly on TV.
Procedures:
   FXALIAS.......Least squares fit aliasing function and remove.  BDROP
                 is the lowest channel in the calibrator average.
Tasks:
   EXTAB.........Exports AIPS table data as tab-separated text.
                 Additional elements from BDROP are printed.
   FITAB.........Writes images / uv data w extensions to tape in FITS
                 format.  The first BDROP pieces are omitted.
   FIXAL.........Least squares fit aliasing function and remove.  BDROP
                 is the lowest channel in the calibrator average.
   PRTAB.........Prints any table-format extension file.  Additional
                 elements from BDROP are printed.
   SL2PL.........Task to convert a Slice File to a Plot File.
   SLFIT.........Task to fit gaussians to slice data.
   SQASH.........Task to collapse several planes in a cube into one plane
                 or row.  BDROP defines the axes over which to sum.
   UVHOL.........Prints holography data from a UV data base with
                 calibration.  BDROP is the minimum number of samples
                 to keep the pointing.
   VLBIN.........Task to read VLBI data from an NRAO/MPI MkII correlator.
                 BDROP channels at the start of each spectrum are
                 omitted.
----------------------------------------------------------------