; INDISK
;---------------------------------------------------------------
;! specifies the disk drive of the 1st 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
;-----------------------------------------------------------------------
;---------------------------------------------------------------
INDISK    LLLLLLLLLLLLUUUUUUUUUUUU CCCCCCCCCCCCCCCCCCCCCCCCCCCCC
----------------------------------------------------------------
INDISK
Type: Adverb  (Real)
Use:  Disk unit # associated with the input image or data set given by
      INNAME, INCLASS, INSEQ.
Null value:  0
      Null value usually means search all disk units.

Verbs:
   ACTNOISE......Puts estimate of actual image uncertainty and zero in
                 header.
   ADDBEAM.......Inserts clean beam parameters in image header.
   ALLDEST.......Delete a group or all of a users data files.
   ALTDEF........Sets frequency vs velocity relationship into image
                 header.
   ALTSWTCH......Switches between frequency and velocity in image header.
   AXDEFINE......Define or modify an image axis description.
   CATALOG.......List one or more entries in the user's data directory.
   CELGAL........Switches header between celestial and galactic
                 coordinates.
   CHKNAME.......Checks for existence of the specified image name.
   CLRNAME.......Clears adverbs specifying the first input image.
   CLRSTAT.......Remove any read or write status flags on a directory
                 entry.
   COODEFIN......Define or modify an image axis coordinate description.
   COPIXEL.......Convert between physical and pixel coordinate values.
   COWINDOW......Set a window based on coordinates.
   DAYNUMBR......Finds day nuumber of an image or uv data set.
   EGETHEAD......Returns parameter value from image header and error code.
   EGETNAME......Fills in input name adverbs by catalog slot number, w
                 error.
   EPOSWTCH......Switches between B1950 and J2000 coordinates in header.
   EVLA..........Puts the list of eVLA antennas in the current file on
                 stack.
   EXTDEST.......Deletes one or more extension files.
   EXTLIST.......Lists detailed information about contents of extension
                 files.
   GETHEAD.......Returns parameter value from image header.
   GETITIME......Verb to return the UV data integration time.
   GETNAME.......Fills 1st input image name parameters by catalog slot
                 number.
   GETTHEAD......Returns keyword values from a table header, also column
                 #, # rows.
   GETVERS.......Finds maximum version number of an extension file.
   HINOTE........Adds user-generated lines to the history extension file.
   HITEXT........Writes lines from history extension file to text file.
   HSA...........Puts the list of HSA antennas in the current file on
                 stack.
   IMCENTER......Returns pixel position of sub-image centroid.
   IMDIST........Determines spherical distance between two pixels.
   IMHEADER......Displays the image header contents to terminal, message
                 file.
   IMSTAT........Returns statistics of a sub-image.
   IMVAL.........Returns image intensity and coordinate at specified
                 pixel.
   MAXFIT........Returns pixel position and image intensity at a maximum.
   MCAT..........Lists images in the user's catalog directory on disk
                 INDISK.
   MFITSET.......Gets adverbs for running IMFIT and JMFIT.
   NAMEGET.......Fills 1st input image name parameters by default
                 matching.
   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.
   PCAT..........Verb to list entries in the user's catalog (no log file).
   PLGET.........Gets the adverbs used to make a particular plot file.
   PRTHI.........Prints selected contents of the history extension file.
   PUTHEAD.......Verb to modify image header parameters.
   PUTTHEAD......Inserts a given value into a table keyword/value pair.
   PUTVALUE......Verb to store a pixel value at specified position.
   QGETVERS......Finds maximum version number of an extension file
                 quietly.
   QHEADER.......Verb to summarize the image header: positions at center.
   QIMVAL........Returns image intensity and coordinate at specified
                 pixel.
   RECAT.........Verb to compress the entries in a catalog file.
   RENAME........Rename a file (UV or Image).
   RENUMBER......Verb to change the catalog number of an image.
   RESCALE.......Verb to modify image scale factor and offset.
   REVERSN.......Checks disk for presence of extension files.
   SIZEFILE......Return file size plus estimate of IMAGR work file size.
   STALIN........Revises history by deleting lines from history extension
                 file.
   T1VERB........Temporary verb for testing (also T2VERB...T9VERB).
   TABGET........Returns table entry for specified row, column and
                 subscript.
   TABPUT........Replaces table entry for specified row, column and
                 subscript.
   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.
   TVCUBE........Verb to load a cube into tv channel(s) & run a movie.
   TVGUESS.......Verb to display slice model guess directly on TV
                 graphics.
   TVLOD.........Verb to load an image into a TV channel.
   TVMODEL.......Verb to display slice model directly on TV graphics.
   TVMOVIE.......Verb to load a cube into tv channel(s) & run a movie.
   TVNAME........Verb to fill image name of that under cursor.
   TVRESID.......Verb to display slice model residuals directly on TV
                 graphics.
   TVROAM........Load up to 16 TV image planes and roam a subset thereof.
   TVSLICE.......Verb to display slice file directly on TV.
   UCAT..........List a user's UV and scratch files on disk INDISK.
   VLA...........Puts the list of VLA antennas in the current file on
                 stack.
   VLBA..........Puts the list of VLBA antennas in the current file on
                 stack.
   ZAP...........Delete a catalog entry and its extension files.
Procedures:
   ANCHECK.......Checks By sign in Antenna files.
   ANTNUM........Returns number of a named antenna.
   BASFIT........Fits antenna locations from SN-table data.
   BOX2CC........Converts CLBOX in pixels to CCBOX in arc seconds.
   COTVLOD.......Proc to load an image into a TV channel about a
                 coordinate.
   CRSFRING......Procedure to calibrate cross pol. delay and phase
                 offsets.
   CXIMAGR.......Grid UV data into a complex image, Fourier transform,
                 Clean.
   CXPOLN........Procedure to make complex polarization images and beam.
   DOFARS........Procedure to aid in Faraday rotation synthesis using the
                 FARS task.
   DOVLAMP.......Produces amp calibration file for phased-VLA VLBI data.
   FITDISK.......Writes images / uv data w extensions to disk in FITS
                 format.
   FXALIAS.......Least squares fit aliasing function and remove.
   FXAVG.........Procedure to enable VLBA delay de-correlation
                 corrections.
   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.
   MAPPR.........Simplified access to IMAGR.
   MAXTAB........Returns maximum version number of named table.
   MERGECAL......Procedure to merge calibration records after
                 concatenation.
   OOCAL.........Determines antenna complex gain with frequency-dependent
                 models.
   OOFRING.......Fringe fit data to determine calibration with spectral
                 index options.
   PEELR.........Calibrates interfering sources in multi-facet imges.
   SCANTIME......Returns time range for a given scan number.
   STUFFR........Averages together data sets in hour angle.
   TVALL.........Procedure loads image to TV, shows labeled wedge,
                 enhances.
   TVDIST........Determines spherical distance between two pixels on TV
                 screen.
   TVFLUX........Displays coordinates and values selected with the TV
                 cursor.
   TVMAXFIT......Displays fit pixel positions and intensity at maxima on
                 TV.
   VLACALIB......Runs CALIB and LISTR for VLA observation.
   VLACLCAL......Runs CLCAL and prints the results with LISTR.
   VLALIST.......Runs LISTR for VLA observation.
   VLARESET......Reset calibration tables to a virginal state.
   VLARUN........Calibrating amplitude and phase, and imaging VLA data.
   VLASUMM.......Plots selected contents of SN or CL files.
   VLATECR.......Calculate ionospheric delay and Faraday rotation
                 corrections.
   VLBAAMP.......Applies a-priori amplitude corrections to VLBA data.
   VLBABPSS......Computes spectral bandpass correction table.
   VLBACALA......Applies a-priori amplitude corrections to VLBA data.
   VLBACCOR......Applies a-priori amplitude corrections to VLBA data.
   VLBACPOL......Procedure to calibrate cross-polarization delays.
   VLBACRPL......Plots crosscorrelations.
   VLBAEOPS......Corrects Earth orientation parameters.
   VLBAFIX.......Procedure that fixes VLBA data, if necessary.
   VLBAFPOL......Checks and corrects polarization labels for VLBA data.
   VLBAFQS.......Copies different FQIDS to separate files.
   VLBAFRGP......Fringe fit phase referenced data and apply calibration.
   VLBAFRNG......Fringe fit data and apply calibration.
   VLBAKRGP......Fringe fit phase referenced data and apply calibration.
   VLBAKRNG......Fringe fit data and apply calibration.
   VLBAMCAL......Merges redundant calibration data.
   VLBAMPCL......Calculates and applies manual instrumental phase
                 calibration.
   VLBAMPHC......Applies VLBARUN calibration to additional phase stopping
                 centers.
   VLBAPANG......Corrects for parallactic angle.
   VLBAPCOR......Calculates and applies instrumental phase calibration.
   VLBARUN.......Applies amplitude and phase calibration procs to VLBA
                 data.
   VLBASNPL......Plots selected contents of SN or CL files.
   VLBASRT.......Sorts VLBA data, if necessary.
   VLBASUBS......Looks for subarrays in VLBA data.
   VLBASUMM......Prints a summary of a VLBI experiment.
   VLBATECR......Calculate ionospheric delay and Faraday rotation
                 corrections.
   WRTDISK.......Writes images / uv data w extensions to disk in FITS
                 format.
Tasks:
   ACCOR.........Corrects cross amplitudes using auto correlation
                 measurements.
   ACFIT.........Determine antenna gains from autocorrelations.
   ACLIP.........Edits suto-corr data for amplitudes, phases, and weights
                 out of range.
   ACSCL.........Corrects cross amplitudes using auto correlation
                 measurements.
   ADDIF.........Adds an IF axis to a uv data set.
   AFARS.........Is used after FARS to determine Position and Value of the
                 maximum.
   AGAUS.........Fits 1-dimensional Gaussians to absorption-line spectra.
   AHIST.........Task to convert image intensities by adaptive histogram.
   ALVAR.........Plots the Allan Variance statistic of a UV data set.
   ALVPR.........Prints statistics on the Allan Variance of a UV data set.
   ANBPL.........Plots and prints uv data converted to antenna based
                 values.
   ANCAL.........Places antenna-based Tsys and gain corrections in CL
                 table.
   ANTAB.........Read amplitude calibration information into AIPS.
   APCAL.........Apply TY and GC tables to generate an SN table.
   APCLN.........Deconvolves images with CLEAN algorithm.
   APGPS.........Apply GPS-derived ionospheric corrections.
   APGS..........Deconvolves image with Gerchberg-Saxton algorithm.
   APVC..........Deconvolves images with van Cittert algorithm.
   ATMCA.........Determines delay/phase gradient from calibrator
                 observations.
   AVER..........Averages over time UV data sets in 'BT' order.
   AVSPC.........Averages uv-data in the frequency domain.
   BAKTP.........Writes all files of a catalog entry to tape in host
                 format.
   BASRM.........Task to remove a spectral baseline from total power
                 spectra.
   BDAPL.........Applies a BD table to another data set.
   BDEPO.........Computes depolarization due to rotation measure
                 gradients.
   BLANK.........Blanks out selected, e.g. non-signal, portions of an
                 image.
   BLAPP.........Applies baseline-based fringe solutions a la BLAPP.
   BLAVG.........Average cross-polarized UV data over baselines.
   BLCAL.........Compute closure offset corrections.
   BLCHN.........Compute closure offset corrections on a
                 channel-by-channel basis.
   BLING.........Find residual rate and delay on individual baselines.
   BLOAT.........Converts line data to greater number channels.
   BLPLT.........Plots BLCAL tables in 2 dimensions as function of
                 baseline and IF.
   BLSUM.........Sums images over irregular sub-images, displays spectra.
   BLWUP.........Blow up an image by any positive integer factor.
   BOXES.........Adds Clean boxes to BOXFILE around sources from a list.
   BPASS.........Computes spectral bandpass correction table.
   BPCOR.........Correct BP table.
   BPEDT.........Interactive TV task to edit uv data based on BP tables.
   BPEPL.........Plots bandpass tables overlaying multiple times like
                 BPEDT.
   BPERR.........Print and plot BPASS closure outputs.
   BPFLG.........Flgas uv data based on bad BP values.
   BPLOT.........Plots bandpass tables in 2 dimensions as function of
                 time.
   BPSMO.........Smooths or interpolates bandpass tables to regular times.
   BPWAY.........Determines channel-dependent relative weights.
   BPWGT.........Calibrates data and scales weights by bandpass
                 correction.
   BSAVG.........Task to do an FFT-weighted sum of beam-switched images.
   BSCAN.........Seeks best scan to use for phase cal, fringe search, ..
   BSCLN.........Hogbom Clean on beam-switched difference image.
   BSCOR.........Combines two beam-switched images.
   BSFIX.........Corrects the ra/dec offsets recorded by the 12m.
   BSGEO.........Beam-switched Az-El image to RA-Dec image translation.
   BSGRD.........Task to image beam-switched single-dish data.
   BSMAP.........Images weak sources with closure phases.
   BSPRT.........Print BS tables.
   BSROT.........Modifies SD beam-switch continuum data for error in
                 throw.
   BSTST.........Graphical display of solutions to frequency-switched
                 data.
   CALIB.........Determines antenna calibration: complex gain.
   CAPLT.........Plots closure amplitude and model from CC file.
   CC2IM.........Make model image from a CC file.
   CCEDT.........Select CC components in BOXes and above mininum flux.
   CCFND.........Prints the contents of a Clean Components extension file.
   CCGAU.........Converts point CLEAN components to Gaussians.
   CCMOD.........Generates clean components to fit specified source model.
   CCMRG.........Sums all clean components at the same pixel.
   CCNTR.........Generate a contour plot file from an image with CC or MF
                 plotted.
   CCRES.........Removes or restores a CC file to a map with a gaussian
                 beam.
   CCSEL.........Select signifigant CC components.
   CENTR.........Modifies UV data to center the reference channel.
   CL2HF.........Convert CL table to HF table.
   CLCAL.........Merges and smooths SN tables, applies them to CL tables.
   CLCOP.........Copy CL/SN file calibration between polarizations or IFs.
   CLCOR.........Applies user-selected corrections to the calibration CL
                 table.
   CLINV.........Copy CL/SN file inverting the calibration.
   CLIP..........Edits data based on amplitudes, phases, and weights out
                 of range.
   CLPLT.........Plots closure phase and model from CC file.
   CLSMO.........Smooths a calibration CL table.
   CLVLB.........Corrects CL table gains for pointing offsets in VLBI
                 data.
   CNTR..........Generate a contour plot file or TV plot from an image.
   COHER.........Baseline Phase coherence measurement.
   COMB..........Combines two images by a variety of mathematical methods.
   CONFI.........Optimize array configuration by minimum side lobes.
   CONPL.........Plots AIPS gridding convolution functions.
   CONVL.........Convolves an image with a gaussian or another image.
   CORER.........Calculates correlator statistics and flags bad ones.
   CORFQ.........Corrects uvw for incorrect observing frequency.
   CPASS.........Computes polynomial spectral bandpass correction table.
   CPYRT.........Replaces history with readme file, inserts copyright.
   CSCOR.........Applies specified corrections to CS tables.
   CUBIT.........Model a galaxy's density and velocity distribution from
                 full cube.
   CVEL..........Shifts spectral-line UV data to a given velocity.
   CXCLN.........Complex Hogbom CLEAN.
   DAYFX.........Fixes day number problems left by FILLM.
   DBAPP.........Appends one or more data sets to the output data set.
   DBCON.........Concatenates two UV data sets.
   DCONV.........Deconvolves a gaussian from an image.
   DECOR.........Measures the decorrelation between channels and IF of uv
                 data.
   DEFLG.........Edits data based on decorrelation over channels and time.
   DELZN.........Determines residual atmosphere depth at zenith and clock
                 errors.
   DENAN.........Modifies UV data flagging all NaNs.
   DESCM.........Copies a portion of a UV data set.
   DFCOR.........Applies user-selected corrections to the calibration CL
                 table.
   DFQID.........Modifies UV data changing the indicated FQIDs.
   DFTIM.........Makes image of DFT at arbitrary point showing time vs
                 frequency.
   DFTPL.........Plots DFT of a UV data set at arbitrary point versus
                 time.
   DIFRL.........Divides the RR data by LL data.
   DIFUV.........Outputs the difference of two matching input uv data
                 sets.
   DISKU.........Shows disk use by one or all users.
   DQUAL.........Rearranges source list, dropping qualifiers.
   DSKEW.........Geometric interpolation correction for skew.
   DSORC.........Copies a data set elliminating some source numbers.
   DSTOK.........Drops the cross-hand polarizations.
   DTCHK.........Task to check results of a test using simulated data.
   DTSUM.........Task to provide a summary of the contents of a dataset.
   EDITA.........Interactive TV task to edit uv data based on TY/SY/SN/CL
                 tables.
   EDITR.........Interactive baseline-oriented visibility editor using the
                 TV.
   ELFIT.........Plots/fits selected contents of SN, TY, SY, PC or CL
                 files.
   ELINT.........Determines and removes gain dependence on elevation.
   EVASN.........Evaluates statistics in SN/CL tables.
   EVAUV.........Subtracts & divides a model into UV data, does statistics
                 on results.
   EXTAB.........Exports AIPS table data as tab-separated text.
   FACES.........Makes images of catalog sources for initial calibration.
   FARAD.........Add ionospheric Faraday rotation to CL table.
   FARS..........Faraday rotation synthesis based on the brightness vs
                 wavelength.
   FFT...........Takes Fourier Transform of an image or images.
   FGCNT.........Counts samples comparing two flag tables.
   FGDIF.........Compares affect of 2 FG tables.
   FGPLT.........Plots selected contents of FG table.
   FGPRT.........Pprints counts of selected portions of an FG table.
   FGSPW.........Flags bad spectral windows.
   FGTAB.........Writes frequency-range flags to a text file to be read by
                 UVFLG.
   FILIT.........Interactive BOXFILE editing with facet images.
   FINDR.........Find normal values for a uv data set.
   FITAB.........Writes images / uv data w extensions to tape in FITS
                 format.
   FITTP.........Writes images / uv data w extensions to tape in FITS
                 format.
   FIXAL.........Least squares fit aliasing function and remove.
   FIXAN.........Fixes the contents of the ANtenna extension file.
   FIXBX.........Converts a BOXFILE to another for input to IMAGR.
   FIXFR.........Modifies UV data set making all frequencies increase or
                 decrease.
   FIXRL.........Correctes right vs left polarizations for a list of
                 antennas.
   FIXWT.........Modify weights to reflect amplitude scatter of data.
   FLAGR.........Edit data based on internal RMS, amplitudes, weights.
   FLATN.........Re-grid multiple fields into one image incl sensitivity.
   FLGIT.........Flags data based on the rms of the spectrum.
   FLOPM.........Reverses the spectral order of UV data, can fix VLA
                 error.
   FQUBE.........Collects n-dimensional images into n+1-dimensional FREQID
                 image.
   FRCAL.........Faraday rotation self calibration task.
   FRING.........Fringe fit data to determine antenna calibration, delay,
                 rate.
   FRMAP.........Task to build a map using fringe rate spectra.
   FRPLT.........Task to plot fringe rate spectra.
   FTFLG.........Interactive flagging of UV data in channel-time using the
                 TV.
   FUDGE.........Modifies UV data with user's algorithm: paraform task.
   FXPOL.........Corrects VLBA polarization assignments.
   FXTIM.........Fixes start date so all times are positive.
   FXVLA.........Task to correct VLA data for on-line errors in special
                 cases.
   FXVLB.........Builds a CQ table to enable VLBA correlator loss
                 corrections.
   GAL...........Determine parameters from a velocity field.
   GCPLT.........Plots gain curves from text files.
   GETJY.........Determines calibrator flux densities.
   GREYS.........Plots images as contours over multi-level grey.
   GSTAR.........Task to read a Guide Star (UK) table and create an ST
                 table.
   HA2TI.........Converts data processed by TI2HA (STUFFER) back to real
                 times.
   HAFIX.........Recomputes u,v,w when time is hour angle (UVdata is
                 output of TI2HA).
   HF2SV.........Convert HF tables from FRING/MBDLY to form used by
                 Calc/Solve.
   HFPRT.........Write HF tables from CL2HF.
   HGEOM.........Interpolates image to different gridding and/or geometry.
   HISEQ.........Task to translate image by histogram equalization.
   HUINT.........Make RGB image from images of intensity & hue, like
                 TVHUEINT.
   IBLED.........Interactive BaseLine based visibility EDitor.
   IM2CC.........Task to convert an image to multi-facet Clean Components.
   IM2UV.........Converts an image to a visibility data set.
   IMAGR.........Wide-field and/or wide-frequency Cleaning / imaging task.
   IMCLP.........Clip an image to a specified range.
   IMEAN.........Displays the mean & extrema and plots histogram of an
                 image.
   IMERG.........Merges images of different spatial resolutions.
   IMFIT.........Fits Gaussians to portions of an image.
   IMFLT.........Fits and removes a background intensity plane from an
                 image.
   IMLHS.........Converts images to luminosity/hue TV display.
   IMLIN.........Fits and removes continuum emission from cube.
   IMMOD.........Adds images of model objects to an image.
   IMRMS.........Plot IMEAN rms answers.
   IMTXT.........Write an image to an external text file.
   IMVIM.........Plots one image's values against another's.
   INDXH.........Writes index file describing contents of UV data base.
   INDXR.........Writes index file describing contents of UV data base.
   IRING.........Integrates intensity / flux in rings / ellipses.
   ISPEC.........Plots and prints spectrum of region of a cube.
   JMFIT.........Fits Gaussians to portions of an image.
   KNTR..........Make a contour/grey plot file from an image w multiple
                 panels.
   KRING.........Fringe fit data to determine antenna calibration, delay,
                 rate.
   LDGPS.........Load GPS data from an ASCII file.
   LGEOM.........Regrids images with rotation, shift using interpolation.
   LISTR.........Prints contents of UV data sets and assoc. calibration
                 tables.
   LOCIT.........Fits antenna locations from SN-table data.
   LPCAL.........Determines instrumental polarization for UV data.
   LTESS.........Makes mosaic images by linear combination.
   LWPLA.........Translates plot file(s) to a PostScript printer or file.
   MAPBM.........Map VLA beam polarization.
   MASKS.........Makes mask image of Clean boxes from boxfile.
   MATCH.........Changes antenna, source, FQ numbers to match a data set.
   MATHS.........Operates on an image with a choice of mathematical
                 functions.
   MBDLY.........Fits multiband delays from IF phases, updates SN table.
   MCUBE.........Collects n-dimensional images into n+1-dimensional image.
   MEDI..........Combines four images by a variety of mathematical
                 methods.
   MF2ST.........Task to generate an ST ext. file from Model Fit ext.
                 file.
   MFPRT.........Prints MF tables in a format needed by modelling
                 software.
   MOD3D.........Computes a 3D CC model from a set of facets.
   MODIM.........Adds images of model objects to image cubes in IQU
                 polarization.
   MODSP.........Adds images of model objects to image cubes in I/V
                 polarization.
   MOMFT.........Calculates images of moments of a sub-image.
   MOMNT.........Calculates images of moments along x-axis (vel, freq,
                 ch).
   MORIF.........Combines IFs or breaks spectral windows into multiple
                 windows (IFs).
   MOVE..........Task to copy or move data from one user or disk to
                 another.
   MSORT.........Sort a UV dataset into a specified order.
   MULIF.........Change number of IFs in output.
   MULTI.........Task to convert single-source to multi-source UV data.
   MWFLT.........Applies linear & non-linear filters to images.
   NANS..........Reads an image or a UV data set and looks for NaNs.
   NINER.........Applies various 3x3 area operaters to an image.
   NNLSQ.........Non-Negative-Least-Squares decomposition of spectrum.
   NOIFS.........Makes all IFs into single spectrum.
   OBEDT.........Task to flag data of orbiting antennas.
   OBPLT.........Plot columns of an OB table.
   OBTAB.........Recalculate orbit parameters and other spacecraft info.
   OFLAG.........Uses on-line flag table information to write a flag
                 table.
   OFUDG.........Modifies UV data with user's algorithm no cal adverbs:
                 paraform task.
   OGEOM.........Simple image rotation, scaling, and translation.
   OHGEO.........Geometric interpolation with correction for 3-D effects.
   OMFIT.........Fits sources and, optionally, a self-cal model to uv
                 data.
   OOSRT.........Sort a UV dataset into a specified order.
   OOSUB.........Subtracts/divides a model from/into a uv data base.
   PADIM.........Task to increase image size by padding with some value.
   PANEL.........Convert HOLOG output to panel adjustment table.
   PASTE.........Pastes a selected subimage of one image into another.
   PBCOR.........Task to apply or correct an image for a primary beam.
   PCAL..........Determines instrumental polarization for UV data.
   PCASS.........Finds amplitude bandpass shape from pulse-cal table data.
   PCAVG.........Averages pulse-cal (PC) tables over time.
   PCCOR.........Corrects phases using  PCAL tones data from PC table.
   PCEDT.........Interactive TV task to edit pulse-cal (PC) tables.
   PCFIT.........Finds delays and phases using a pulse-cal (PC) table.
   PCFLG.........Interactive flagging of Pulse-cal data in channel-TB
                 using the TV.
   PCHIS.........Generates a histogram plot file from text input, e.g.
                 from PCRMS.
   PCLOD.........Reads ascii file containing pulse-cal info to PC table.
   PCNTR.........Generate plot file with contours plus polarization
                 vectors.
   PCPLT.........Plots pulse-cal tables in 2 dimensions as function of
                 time.
   PCRMS.........Finds statistics of a pulse-cal table; flags bad times
                 and channels.
   PCVEL.........Shifts spectral-line UV data to a given velocity: planet
                 version.
   PDEDT.........Interactive TV task to edit polarization D-term (PD)
                 tables.
   PDPLT.........Plots selected contents of PD tables.
   PEEK..........Fits pointing model function to output from the VLA.
   PFPL1.........Paraform Task to generate a plot file: (does grey scale).
   PFPL2.........Paraform Task to generate a plot file: (slice intensity).
   PFPL3.........Paraform Task to generate a plot file: (does histogram).
   PGEOM.........Task to transform an image into polar coordinates.
   PHASE.........Baseline Phase coherence measurement.
   PHNEG.........Negates a UV datafile's visibility phase.
   PHSRF.........Perform phase-referencing within a spectral line
                 database.
   PLAYR.........Task to load one or two images and play with them on the
                 TV.
   PLCUB.........Task to plot intensity vs x panels on grid of y,z pixels.
   PLOTC.........Plots color schems used by 3-color plot tasks.
   PLOTR.........Basic task to generate a plot file from text input.
   PLROW.........Plot intensity of a series of rows with an offset.
   POLCO.........Task to correct polarization maps for Ricean bias.
   POLSN.........Make a SN table from cross polarized fringe fit.
   POSSM.........Task to plot total and cross-power spectra.
   PPAPP.........Applies Right minus Left phase difference to a 2nd data
                 set.
   PROFL.........Generates plot file for a profile display.
   PRTAB.........Prints any table-format extension file.
   PRTAN.........Prints the contents of the ANtenna extension file.
   PRTCC.........Prints the contents of a Clean Components extension file.
   PRTIM.........Prints image intensities from an MA catalog entry.
   PRTOF.........Prints on-line flag table information.
   PRTSD.........Prints contents of AIPS single-dish data sets.
   PRTSY.........Task to print statistics from the SY table.
   PRTUV.........Prints contents of a visibility (UV) data set.
   QUACK.........Flags beginning or end portions of UV-data scans.
   QUFIX.........Determines Right minus Left phase difference, corrects
                 cal files.
   QUOUT.........Writes text file of Q, U versus frequency to be used by
                 RLDIF.
   QUXTR.........Extracts text files from Q,U cubes for input to TARS.
   REAMP.........Scale visibility amplitudes by IF- or subarray-dependent
                 factor.
   REFLG.........Attempts to compress a flag table.
   REGRD.........Regrids an image from one co-ordinate frame to another.
   REIFS.........Breaks spectral windows into multiple spectral windows
                 (IFs).
   REMAG.........Task to replace magic blanks with a user specified value.
   RESEQ.........Renumber antennas.
   REWAY.........Computes weights based in rms in spectra.
   REWGT.........Modifies UV data re-scaling the weights only.
   RFARS.........Correct Q/U cubes for Faraday rotation synthesis results.
   RFI...........Look for RFI in uv data.
   RFLAG.........Flags data set based on time and freq rms in fringe
                 visibilities.
   RGBMP.........Task to create an RGB image from the 3rd dim of an image.
   RLCAL.........Determines instrumental right-left phase versus time (a
                 self-cal).
   RLCOR.........Corrects a data set for R-L phase differences.
   RLDIF.........Determines Right minus Left phase difference, corrects
                 cal files.
   RLDLY.........Fringe fit data to determine antenna R-L delay
                 difference.
   RM............Task to calculate rotation measure and magnetic field.
   RM2PL.........Plots spectrum of a pixel with RMFIT fit.
   RMFIT.........Fits 1-dimensional polarization spectrum to Q/U cube.
   RMSD..........Calculate rms for each pixel using data in a box around
                 the pixel.
   RSPEC.........Plots and prints spectrum of rms of a cube.
   RSTOR.........Restores a Clean component file to a map with a Gaussian
                 beam.
   SABOX.........Create box file from source islands in facet images.
   SAD...........Finds and fits Gaussians to portions of an image.
   SBCOR.........Task to correct VLBA data for phase shift between USB &
                 LSB.
   SCIMG.........Full-featured imaging plus self-calibration loop with
                 editing.
   SCLIM.........Operates on an image with a choice of mathematical
                 functions.
   SCMAP.........Imaging plus self-calibration loop with editing.
   SDCAL.........Task to apply single dish calibration.
   SDCLN.........Deconvolves image by Clark and then "SDI" cleaning
                 methods.
   SDGRD.........Task to select and image random-position single-dish
                 data.
   SDIMG.........Task to select and image random-position single-dish
                 data.
   SDLSF.........Least squares fit to channels and subtracts from SD uv
                 data.
   SDMOD.........Modifies single-dish UV data with model sources.
   SDTUV.........Task to convert SD table files to UV like data.
   SDVEL.........Shifts spectral-line single-dish data to a given
                 velocity.
   SERCH.........Finds line signals in transposed data cube.
   SETFC.........Makes a BOXFILE for input to IMAGR.
   SETJY.........Task to enter source info into source (SU) table.
   SHADW.........Generates the "shadowed" representation of an image.
   SHOUV.........Displays uv data in various ways.
   SKYVE.........Regrids a DSS image from one co-ordinate frame to
                 another.
   SL2PL.........Task to convert a Slice File to a Plot File.
   SLCOL.........Task to collate slice data and models.
   SLFIT.........Task to fit gaussians to slice data.
   SLICE.........Task to make a slice file from an image.
   SLPRT.........Task to print a Slice File.
   SMOTH.........Task to smooth a subimage from upto a 7-dim. image.
   SNBLP.........Plots selected contents of SN or CL files on a baseline
                 basis.
   SNCOP.........Task to copy SN table averaging some input IFs.
   SNCOR.........Applies user-selected corrections to the calibration SN
                 table.
   SNDUP.........Copies and duplicates SN table from single pol file to
                 dual pol.
   SNEDT.........Interactive SN/CL/TY/SY table editor using the TV.
   SNFIT.........Fits parabola to SN amplitudes and plots result.
   SNFLG.........Writes flagging info based on the contents of SN files.
   SNIFS.........Plots selected contents of SN, TY, SY, PC or CL files by
                 IF.
   SNP2D.........Task to convert SN table single-channel phase to delay.
   SNPLT.........Plots selected contents of SN, SY, TY, PC or CL files
                 versus time.
   SNREF.........Chooses best reference antenna to minimize R-L
                 differences.
   SNSMO.........Smooths and filters a calibration SN table.
   SOLCL.........Adjust gains for solar data according to nominal
                 sensitivity.
   SOUSP.........Fits source spectral index from SU table or adverbs.
   SPCAL.........Determines instrumental polzn. for spec. line UV data.
   SPCOR.........Task to correct an image for a primary beam and spectral
                 index.
   SPECR.........Spectral regridding task for UV data.
   SPFIX.........Makes cube from input to and output from SPIXR spectral
                 index.
   SPFLG.........Interactive flagging of UV data in channel-TB using the
                 TV.
   SPIXR.........Fits spectral indexes to each row of an image incl
                 curvature.
   SPLAT.........Applies calibration and splits or assemble selected
                 sources.
   SPLIT.........Converts multi-source to single-source UV files w
                 calibration.
   SPMOD.........Modify UV database by adding a model with spectral lines.
   SPRMS.........Plots spectral statistics of a selected subset of a uv
                 data set.
   SQASH.........Task to collapse several planes in a cube into one plane
                 or row.
   STACK.........Task to co-add a set of 2-dimensional images with
                 weighting.
   STARS.........Task to generate an ST ext. file with star positions.
   STEER.........Task which deconvolves the David Steer way.
   STESS.........Task which finds sensitivity in mosaicing.
   STFND.........Task to find stars in an image and generate an ST table.
   STFUN.........Task to calculate a structure function image.
   STRAN.........Task compares ST tables, find image coordinates (e.g.
                 guide star ).
   SUBIM.........Task to select a subimage from up to a 7-dim. image.
   SUFIX.........Modifies source numbers on uv data.
   SUMIM.........Task to sum overlapping, sequentially-numbered images.
   SUMSQ.........Task to sum the squared pixel values of overlapping,.
   SWAPR.........Modifies UV data by swapping real and imaginary parts.
   SWPOL.........Swap polarizations in a UV data base.
   SY2TY.........Task to generate a TY extension file from an EVLA SY
                 table.
   SYPRT.........Task to print values from the SY table.
   SYSOL.........Undoes and re-does nominal sensitivity application for
                 Solar data.
   SYVSN.........Plots selected SY/TY data with SN solution values versus
                 time.
   TABED.........Task to edit tables.
   TACOP.........Task to copy tables, other extension files.
   TADIF.........Prints differences between two table-format extension
                 files.
   TAFFY.........User definable task to operate on an image.
   TAFLG.........Flags data in a Table extension file.
   TAMRG.........Task to merge table rows under specified conditions.
   TAPLT.........Plots data from a Table extension file.
   TAPPE.........Task to append 2 tables and merge to output table.
   TARPL.........Plot input and output text files of the TARS task.
   TASAV.........Task to copy all extension tables to a dummy uv or map
                 file.
   TASRT.........Task to sort extension tables.
   TBAVG.........Time averages data combining all baselines.
   TBDIF.........Compare entries in two tables.
   TBOUT.........Writes an AIPS table into a text file for user editting.
   TBSUB.........Make a new table from a subset of an old table.
   TBTSK.........Paraform OOP task for tables.
   TECOR.........Calculate ionospheric delay and Faraday rotation
                 corrections.
   TI2HA.........Modifies times in UV data to hour angles.
   TIORD.........Checks data for time baseline ordering, displays
                 failures.
   TKPL..........Task to send a plot file to the TEK.
   TLCAL.........Converts JVLA telcal files to an SN file.
   TRANS.........Task to transpose a subimage of an up to 7-dim. image.
   TRUEP.........Determines true antenna polarization from special data
                 sets.
   TVFLG.........Interactive flagging of UV data using the TV.
   TVHLD.........Interactive task to load an image to the TV with
                 histogram equalization.
   TVHUI.........Make TV image from images of intensity, hue, saturation.
   TVIEW.........Display image cube in all 3 transpositions with rotation
                 & reference.
   TVPL..........Display a plot file on the TV.
   TVRGB.........Make TV image from images of true color (RGB) images.
   TVSAD.........Finds and fits Gaussians to portions of an image with
                 interaction.
   TVSPC.........Display images and spectra from a cube.
   TXPL..........Displays a plot (PL) file on a terminal or line printer.
   TYAPL.........Undoes and re-does nominal sensitivity application.
   TYCOP.........Copy TY or SY table calibration between IFs.
   TYSMO.........Smooths and filters a calibration TY or SY table.
   UBAVG.........Baseline dependent time averaging of uv data.
   UFLAG.........Plots and edits data using a uv-plane grid and the TV.
   UJOIN.........Modifies UV data converting IFs to spectral channels.
   UNCAL.........Sets up tables for uncalibrating Australia Telescope
                 data.
   USUBA.........Assign subarrays within a uv-data file.
   UTESS.........Deconvolves images by maximizing emptiness.
   UV2MS.........Append single-source file to multi-source file.
   UV2TB.........Converts UV autocorrelation spectra to tables.
   UVADC.........Fourier transforms and corrects a model and adds to uv
                 data.
   UVADD.........Combines two matching uv data sets.
   UVAVG.........Average or merge a sorted (BT, TB) uv database.
   UVBAS.........Averages several channels and subtracts from uv data.
   UVCMP.........Convert a UV database to or from compressed format.
   UVCOP.........Task to copy a subset of a UV data file.
   UVCRS.........Finds the crossing points of UV-ellipses.
   UVDEC.........Decrements the number of spectral channels, keeping every
                 nth.
   UVDGP.........Copy a UV data file, deleting a portion of it.
   UVDI1.........Subtract UV data(averaged up to one time) from the other
                 UV data.
   UVDIF.........Prints differences between two UV data sets.
   UVFIT.........Fits source models to uv data.
   UVFIX.........Recomputes u,v,w for a uv database.
   UVFLG.........Flags UV-data.
   UVFND.........Prints selected data from UV data set to search for
                 problems.
   UVFRE.........Makes one data set have the spectral structure of
                 another.
   UVGIT.........Fits source models to uv data.
   UVGLU.........Glues UV data frequency blocks back together.
   UVHGM.........Plots statistics of uv data files as histogram.
   UVHIM.........Makes image of the histogram on two user-chosen axes.
   UVHOL.........Prints holography data from a UV data base with
                 calibration.
   UVIMG.........Grid UV data into an "image".
   UVLIN.........Fits and removes continuum visibility spectrum, also can
                 flag.
   UVLSD.........Least squares fit to channels and divides the uv data.
   UVLSF.........Least squares fit to channels and subtracts from uv data.
   UVMAP.........Makes images from calibrated UV data.
   UVMLN.........Edits data based on the rms of the spectrum.
   UVMOD.........Modify UV database by adding a model incl spectral index.
   UVMTH......... Averages one data set and applied it to another.
   UVNOU.........Flags uv samples near the U,V  axes to reduce
                 interference.
   UVPLT.........Plots data from a UV data base in multiple ways.
   UVPOL.........Modifies UV data to make complex image and beam.
   UVPRM.........Measures parameters from a UV data base.
   UVPRT.........Prints data from a UV data base with calibration.
   UVRFI.........Mitigate RFI by Fourier transform or fitting the circle.
   UVRMS.........Computes statistics of a selected subset of a uv data
                 set.
   UVSEN.........Determine RMS sidelobe level and brightness sensitivity.
   UVSRT.........Sort a UV dataset into a specified order.
   UVSUB.........Subtracts/divides a model from/into a uv data base.
   UVWAX.........Flags uv samples near the U,V  axes to reduce
                 interference.
   VBCAL.........Scale visibility amplitudes by antenna based constants.
   VBGLU.........Glues together data from multiple passes thru the VLBA
                 corr.
   VBMRG.........Merge VLBI data, eliminate duplicate correlations.
   VLABP.........VLA antenna beam polarization correction for snapshot
                 images.
   VLAMP.........Makes ANTAB file for phased VLA used in VLBI
                 observations.
   VLANT.........Applies VLA/EVLA antenna position corrections from OPs
                 files.
   VLOG..........Pre-process external VLBA calibration files.
   VPFLG.........Resets flagging to all or all corss-hand whenever some
                 are flagged.
   VPLOT.........Plots uv data and model from CC file.
   VTESS.........Deconvolves sets of images by the Maximum Entropy Method.
   VTEST.........Measures velocity discrepancy across fields.
   WARP..........Model warps in Galaxies.
   WETHR.........Plots selected contents of WX tables, flags data based on
                 WX.
   WIPER.........Plots and edits data from a UV data base using the TV.
   WTMOD.........Modifies weights in a UV data set.
   WTSUM.........Task to do a a sum of images weighted by other images.
   XBASL.........Fits and subtracts nth-order baselines from cube (x
                 axis).
   XG2PL.........Plots spectrum of a pixel with XGAUS/AGAUS and
                 ZEMAN/ZAMAN fits.
   XGAUS.........Fits 1-dimensional Gaussians to images: restartable.
   XMOM..........Fits one-dimensional moments to each row of an image.
   XPLOT.........Plots image rows one at a time on the graphics or TV
                 screen.
   XSMTH.........Smooth data along the x axis.
   XSUM..........Sum or average images on the x axis.
   XTRAN.........Create an image with transformed coordinates.
   XYDIF.........Find/apply X minus Y linear polarization phase
                 difference.
   XYMOD.........Compute linear polarization point source model, applies
                 to data.
   ZAMAN.........Fits 1-dimensional Zeeman model to absorption-line data.
   ZEMAN.........Fits 1-dimensional Zeeman model to data.
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