; NITER
;---------------------------------------------------------------
;! The number of iterations of a process.
;# ADVERB GENERAL
;-----------------------------------------------------------------------
;;  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
;-----------------------------------------------------------------------
;---------------------------------------------------------------
NITER     LLLLLLLLLLLLUUUUUUUUUUUU CCCCCCCCCCCCCCCCCCCCCCCCCCCCC
----------------------------------------------------------------
NITER
Type: Adverb   (Real)
Use:  NITER is a general adverb to express a number representing the
      maximum number of iterations in a process such as Cleaning an
      image, steps in a solving a non-linear relationship, or a limit
      for the listing data.
Null value:  0
      Null value assignment varies with task or verb.

Verbs:
   OBITIMAG......Access to OBIT task Imager without self-cal or peeling.
   OBITMAP.......Simplified access to OBIT task Imager.
   OBITPEEL......Access to OBIT task Imager with self-cal and peeling.
   OBITSCAL......Access to OBIT task Imager with self-cal, NOT peeling.
Procedures:
   CXIMAGR.......Grid UV data into a complex image, Fourier transform,
                 Clean.
   DOFARS........Procedure to aid in Faraday rotation synthesis using the
                 FARS task.
   DOOSRO........Calibrating amplitude and phase, and imaging VLA data.
   LINIMAGE......Build image cube from multi-IF data set.
   MAPPR.........Simplified access to IMAGR.
   PIPEAIPS......Calibrating amplitude and phase, and imaging VLA data.
   VLARUN........Calibrating amplitude and phase, and imaging VLA data.
   Y2KSAVE.......Verifies correctness and performance using standard
                 problems.
Tasks:
   AGAUS.........Fits 1-dimensional Gaussians to absorption-line spectra.
   APCLN.........Deconvolves images with CLEAN algorithm.
   APGS..........Deconvolves image with Gerchberg-Saxton algorithm.
   APVC..........Deconvolves images with van Cittert algorithm.
   BSCLN.........Hogbom Clean on beam-switched difference image.
   BSTST.........Graphical display of solutions to frequency-switched
                 data.
   CXCLN.........Complex Hogbom CLEAN.
   DCONV.........Deconvolves a gaussian from an image.
   DESCM.........Copies a portion of a UV data set.
   FARS..........Faraday rotation synthesis based on the brightness vs
                 wavelength.
   FRCAL.........Faraday rotation self calibration task.
   FTARS.........Fits 1-dimensional polarization spectrum to Q/U text
                 file.
   IMAGR.........Wide-field and/or wide-frequency Cleaning / imaging task.
   IMFIT.........Fits Gaussians to portions of an image.
   JMFIT.........Fits Gaussians to portions of an image.
   OMFIT.........Fits sources and, optionally, a self-cal model to uv
                 data.
   RMFIT.........Fits 1-dimensional polarization spectrum to Q/U cube.
   RSTOR.........Restores a Clean component file to a map with a Gaussian
                 beam.
   SCIMG.........Full-featured imaging plus self-calibration loop with
                 editing.
   SCMAP.........Imaging plus self-calibration loop with editing.
   SDCLN.........Deconvolves image by Clark and then "SDI" cleaning
                 methods.
   STEER.........Task which deconvolves the David Steer way.
   TARS..........Simulation of Faraday rotation synthesis (mainly task
                 FARS).
   UTESS.........Deconvolves images by maximizing emptiness.
   UVDIF.........Prints differences between two UV data sets.
   UVFIT.........Fits source models to uv data.
   UVFND.........Prints selected data from UV data set to search for
                 problems.
   UVGIT.........Fits source models to uv data.
   VTESS.........Deconvolves sets of images by the Maximum Entropy Method.
   XGAUS.........Fits 1-dimensional Gaussians to images: restartable.
----------------------------------------------------------------
