AIPS HELP file for DOBLANK in 31DEC25

As of Thu Nov 13 13:32:17 2025

HELP SECTION

DOBLANK
Type: Adverb  (Logical,  > 0  =>  true)
Use:  To control the handling of blanking and/or blanked pixels.
      The actual meaning depends on the task (see below).
Null value:  0 false
Procedures:
   VLACLCAL......Runs CLCAL and prints the results with LISTR.
Tasks:
   BPPLT.........Plots selected contents of bandpass (BP) files versus
                 time.
   CHKFC.........Makes images of Clean boxes from Boxfile.  DOBLANK > 0
                 causes magic blanks to be written outside Clean boxes.
   CLCAL.........Merges and smooths SN tables, applies them to CL
                 tables.  DOBLANK controls how blanked (failed)
                 solutions are handled.
   CLSMO.........Smooths a calibration CL table.  DOBLANK controls
                 whether good or failed solutions are the ones changed.
   CONVL.........Convolves an image with a gaussian or another image.
                 DOBLANK > 0 causes the smoothed output to be blanked at
                 those pixels which were blanked on input.
   ELFIT.........Plots/fits selected contents of SN, TY, SY, PC or CL
                 files.  DOBLANK > 0 controls the plot symbol used for
                 blanked data, otherwise they are omitted.
   KNTR..........Make a contour/grey plot file from an image w multiple
                 panels.  DOBLANK > 0 causes the boundary between
                 blanked and normal pixels to be plotted.
   MASKS.........Makes mask image of Clean boxes from boxfile.
                 DOBLANK > 0 causes the pixels outside of Clean boxes
                 to be magic blanks.
   SNBLP.........Plots selected contents of SN or CL files on a baseline
                 basis.  DOBLANK > 0 selects the plot symbol for blanked
                 data which are otherwise omitted.
   SNFIT.........Fits parabola to SN amplitudes and plots result.
                 DOBLANK>0 selects the plot symbol for blanked data
                 which are otherwise omitted.
   SNIFS.........Plots selected contents of SN, TY, SY, PC or CL files
                 by IF.  DOBLANK > 0 selects the plot symbol for blanked
                 data which are otherwise omitted.
   SNPLT.........Plots selected contents of SN, SY, TY, PC or CL files
                 versus time.  DOBLANK > 0 selects the plot symbol for
                 blanked data which are otherwise omitted.
   SNSMO.........Smooths and filters a calibration SN table.  DOBLANK
                 controls whther good or blanked solutions (or both) are
                 changed.
   SPCOR.........Task to correct an image for a primary beam and
                 spectral index.  DOBLANK > 0 causes the output to be
                 blanked where the spectral index image is blanked.
                 Else output is the beam corrected input with no
                 spectral index alteration.
   SYHIS.........Task to clip, filter, smooth SY tables and plot
                 histograms.
   SYVSN.........Plots selected SY/TY data with SN solution values
                 versus time.  DOBLANK > 0 controls the plt symbol used
                 for blanked data which are otherwise omitted.
   TYSMO.........Smooths and filters a calibration TY or SY table.
                 DOBLANK controls whether blanked or good data or both
                 are changed.
   UNSPX.........Removes spectral index model from a data cube.  DOBLANK
                 controls whether blanked pixels in the model blank the
                 output.
   UVHIM.........Makes image of the histogram on two user-chosen axes.
                 DOBLANK > 0 causes all 0 values to be written with
                 magic blanks.

EXPLAIN SECTION