; IN3SEQ
;---------------------------------------------------------------
;! specifies the sequence # of the 3rd input image or data base
;# ADVERB CATALOG
;-----------------------------------------------------------------------
;;  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
;-----------------------------------------------------------------------
;---------------------------------------------------------------
IN3SEQ    LLLLLLLLLLLLUUUUUUUUUUUU CCCCCCCCCCCCCCCCCCCCCCCCCCCCC
----------------------------------------------------------------
IN3SEQ
Type: Adverb  (Real)
Use:  Data files are stored in AIPS under logical names which
      have 3 parts: a 12-character "name" field, a 6-character
      "class" field, and a numeric "sequence number" field.
      IN3SEQ is used to specify the "sequence number" field for
      the 3rd of the input data files used by a verb or task.
      It is used as an integer number between 0 and 9999.
Null value:  0
      Null value means take the image having the highest
      sequence number which is consistent with the other adverb
      name parameters unless explicitly stated otherwise in the
      Help file for the verb or task.

Verbs:
   CLR3NAME......Clears adverbs specifying the third input image.
   GET3NAME......Fills 3rd input image name parameters by catalog slot
                 number.
   IM3HEAD.......Displays the image 3 header contents to terminal, message
                 file.
   Q3HEADER......Verb to summarize the image 3 header: positions at
                 center.
Procedures:
   IMFRING.......Large image delay fitting with IM2CC and OOFRING.
   IMSCAL........Large image self-cal with IM2CC and OOCAL.
   LINIMAGE......Build image cube from multi-IF data set.
   OOCAL.........Determines antenna complex gain with frequency-dependent
                 models.
   OOFRING.......Fringe fit data to determine calibration with spectral
                 index options.
Tasks:
   BPASS.........Computes spectral bandpass correction table.
   COMB..........Combines two images by a variety of mathematical methods.
   CPASS.........Computes polynomial spectral bandpass correction table.
   FQUBE.........Collects n-dimensional images into n+1-dimensional FREQID
                 image.
   GREYS.........Plots images as contours over multi-level grey.
   IBLED.........Interactive BaseLine based visibility EDitor.
   IMAGR.........Wide-field and/or wide-frequency Cleaning / imaging task.
   IMLHS.........Converts images to luminosity/hue TV display.
   KNTR..........Make a contour/grey plot file from an image w multiple
                 panels.
   MCUBE.........Collects n-dimensional images into n+1-dimensional image.
   MEDI..........Combines four images by a variety of mathematical
                 methods.
   MODIM.........Adds images of model objects to image cubes in IQU
                 polarization.
   OOSUB.........Subtracts/divides a model from/into a uv data base.
   PCNTR.........Generate plot file with contours plus polarization
                 vectors.
   PDPLT.........Plots selected contents of PD tables.
   QUFIX.........Determines Right minus Left phase difference, corrects
                 cal files.
   RFARS.........Correct Q/U cubes for Faraday rotation synthesis results.
   RMFIT.........Fits 1-dimensional polarization spectrum to Q/U cube.
   SPCOR.........Task to correct an image for a primary beam and spectral
                 index.
   SUMIM.........Task to sum overlapping, sequentially-numbered images.
   SUMSQ.........Task to sum the squared pixel values of overlapping,.
   TVHUI.........Make TV image from images of intensity, hue, saturation.
   TVRGB.........Make TV image from images of true color (RGB) images.
   TVSPC.........Display images and spectra from a cube.
   UTESS.........Deconvolves images by maximizing emptiness.
   VBGLU.........Glues together data from multiple passes thru the VLBA
                 corr.
   VTESS.........Deconvolves sets of images by the Maximum Entropy Method.
   WTSUM.........Task to do a a sum of images weighted by other images.
----------------------------------------------------------------
Procedures:
   IMFRING.......Large image delay fitting with IM2CC and OOFRING.
                 The 3rd image is of spectral index.
   IMSCAL........Large image self-cal with IM2CC and OOCAL.
                 The 3rd image is of spectral index.
   LINIMAGE......Build image cube from multi-IF data set.
                 The 3rd image is of spectral index.
   OOCAL.........Determines antenna complex gain with frequency-dependent
                 models.  The 3rd image is of spectral index.
   OOFRING.......Fringe fit data to determine calibration with spectral
                 index options.  The 3rd image is of spectral index.
Tasks:
   BPASS.........Computes spectral bandpass correction table.
                 The 3rd data set is the "channel 0" data.
   COMB..........Combines two images by a variety of mathematical methods.
                 The third image is of noise corresponding to the 1st
                 image.
   CPASS.........Computes polynomial spectral bandpass correction table.
                 The 3rd data set is the "channel 0" data.
   GREYS.........Plots images as contours over multi-level grey.
                 The 3rd image is in the green coor.
   IBLED.........Interactive BaseLine based visibility EDitor.  The 3rd
                 image is a Clean model.
   IMAGR.........Wide-field and/or wide-frequency Cleaning / imaging
                 task.  The 3rd image is of spectral index.
   IMLHS.........Converts images to luminosity/hue TV display.  The 3rd
                 image is of saturation.
   KNTR..........Make a contour/grey plot file from an image w multiple
                 panels.  The 3rd image is of Q or total polarization.
   MCUBE.........Collects n-dimensional images into n+1-dimensional image.
                 IN3SEQ is the sequence number increment.
   MEDI..........Combines four images by a variety of mathematical
                 methods.
   MODIM.........Adds images of model objects to image cubes in IQU
                 polarization.  the 3rd image is of U polarization.
   OOSUB.........Subtracts/divides a model from/into a uv data base.
                 The 3rd image is of spectral index.
   PCNTR.........Generate plot file with contours plus polarization
                 vectors.  The 3rd image is of polarization angle.
   PDPLT.........Plots selected contents of PD tables.
   QUFIX.........Determines Right minus Left phase difference, corrects
                 cal files.  The 3rd image is of calibrated spectral
                 polarization that is lacking the RLDIF correction.
   RFARS.........Correct Q/U cubes for Faraday rotation synthesis results.
                 The 3rd image os of rotation measure.
   RMFIT.........Fits 1-dimensional polarization spectrum to Q/U cube.
                 The 3rd image is of unpolarized intensity (Stokes I).
   SPCOR.........Task to correct an image for a primary beam and spectral
                 index.  the 3rd image is of spectral curvature.
   SUMIM.........Task to sum overlapping, sequentially-numbered images.
                 IN3SEQ is the sequence number increment.
   SUMSQ.........Task to sum the squared pixel values of overlapping,.
                 IN3SEQ is the sequence number increment.
   TVHUI.........Make TV image from images of intensity, hue, saturation.
                 The 3rd image is of saturation.
   TVRGB.........Make TV image from images of true color (RGB) images.
                 The 3rd image is of blue (if needed).
   TVSPC.........Display images and spectra from a cube.  The 3rd image
                 is of a second optional transposed cube.
   UTESS.........Deconvolves images by maximizing emptiness.  The 3rd
                 image is of default levels.
   VBGLU.........Glues together data from multiple passes thru the VLBA
                 corr.
   VTESS.........Deconvolves sets of images by the Maximum Entropy Method.
                 The 3rd image is of default levels.
   WTSUM.........Task to do a a sum of images weighted by other images.
                 The 3rd image is of weights corresponding to the 1st
                 image.
----------------------------------------------------------------
