AIPS HELP file for CUTOFF in 31DEC25

As of Thu Nov 13 14:12:01 2025

HELP SECTION

CUTOFF
Type: Adverb  (Real)
Use:  If some value is below CUTOFF in units of the data, then some
      action will not occur.
Null value: none and no default.
Tasks:
   BPPLT.........Plots selected contents of bandpass (BP) files versus
                 time.
   CCEDT.........Select CC components in BOXes and above mininum flux.
                 Clean components below CUTOFF Jy are rejected.
   CCNTR.........Generate a contour plot file from an image.  Clean
                 components below CUTOFF are not plotted.
   CCSEL.........Select significant CC components.  Regions with summed
                 Clean flux below CUTOFF are omitted from the output.
   CLCAL.........Merges and smooths SN tables, applies them to CL
                 tables.  CUTOFF is the maximum time interval over which
                 interpolation will take place.
   CLSMO.........Smooths a calibration CL table.  CUTOFF is the minimum
                 summed weight from the smoothing function.
   CLVLB.........Corrects CL table gains for pointing offsets in VLBI
                 data.  CUTOFF is the minimum single-dish beam value
                 allowed.
   ELFIT.........Plots/fits selected contents of SN, TY, SY, PC or CL
                 files.  CUTOFF is the minimum table weight for plotted
                 points.
   EVASN.........Evaluates statistics in SN/CL tables.  CUTOFF is the
                 minimum table weight for points to be considered.
   FIXAL.........Least squares fit aliasing function and remove.  CUTOFF
                 is the maximum allowed RMS of the residual.
   PCCOR.........Corrects phases using  PCAL tones data from PC table.
                 CUTOFF may be used to turn off the cable correction.
   PCFIT.........Finds delays and phases using a pulse-cal (PC) table.
                 CUTOFF is the maximim delay change in nanosec before a
                 discontinuity is introduced.
   QBEAM.........Plot holography data as contour image and outputs
                 interpolated image.
   RIRMS.........Computes rms of real/imag of a selected subset of a uv
                 data set
   SDCLN.........Does image deconvolution with BGC CLEAN and/or
                 Steer-Dewdney-Ito methods.  CUTOFF is the intensity
                 (fraction) above which a pixel is taken as an SDI
                 component.
   SDLSF.........Least squares fit to channels and subtracts from SD uv
                 data.  CUTOFF is the maximum allowed rms of the
                 residual before the data are flagged.
   SNBLP.........Plots selected contents of SN or CL files on a baseline
                 basis.  Table weights below CUTOFF will not be plotted.
   SNFIT.........Fits parabola to SN amplitudes and plots result.  Table
                 entries with weights below CUTOFF are not used.
   SNFLG.........Writes flagging info based on the contents of SN files.
                 Table entries with weight below CUTOFF are not used.
   SNIFS.........Plots selected contents of SN, TY, SY, PC or CL files
                 by IF.  Table entries with weight below CUTOFF are not
                 plotted.
   SNPLT.........Plots selected contents of SN, SY, TY, PC or CL files
                 versus time.  Table entries with weight below CUTOFF
                 are not plotted.
   SNRMS.........Print statistics for selected contents of SN, SY, TY,
                 PC or CL files.
   SNSMO.........Smooths and filters a calibration SN table.  CUTOFF is
                 the minimum summed weight from the smoothing function.
   SYHIS.........Task to clip, filter, smooth SY tables and plot
                 histograms.
   SYSOL.........Undoes and re-does nominal sensitivity application for
                 Solar data.  If fraction of good SY values < CUTOFF,
                 apply an average correction instead.
   SYVSN.........Plots selected SY/TY data with SN solution values
                 versus time.  Table entries with weight below CUTOFF
                 are not plotted.
   TYAPL.........Undoes and re-does nominal sensitivity application.  If
                 fraction of good SY values < CUTOFF, apply an average
                 correction instead.
   TYSMO.........Smooths and filters a calibration TY or SY table.
                 CUTOFF is the minimum summed weight from the smoothing
                 function.
   UVLSD.........Least squares fit to channels and divides the uv data.
                 Solution is flagged if the rms residual in the fit
                 channels exceeds CUTOFF.
   UVLSF.........Least squares fit to channels and subtracts from uv
                 data.  Solution is flagged if the rms residual in the
                 fit channels exceeds CUTOFF.
Procedures:
   DOOSRO........Calibrating amplitude and phase, and imaging VLA data.
                 CUTOFF is the minimum component flux in Cleaning.
   PIPEAIPS......Calibrating amplitude and phase, and imaging VLA data.
                 CUTOFF is the minimum component flux in Cleaning.
   VLARUN........Calibrating amplitude and phase, and imaging VLA data.
                 CUTOFF is the minimum component flux in Cleaning.

EXPLAIN SECTION