; CUTOFF
;---------------------------------------------------------------
;! specifies a limit below or above which the operation ends
;# ADVERB IMAGING
;-----------------------------------------------------------------------
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;;  Associated Universities, Inc. Washington DC, USA.
;;
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;-----------------------------------------------------------------------
;---------------------------------------------------------------
CUTOFF    LLLLLLLLLLLLUUUUUUUUUUUU CCCCCCCCCCCCCCCCCCCCCCCCCCCCC
----------------------------------------------------------------
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:
   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.
   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.
   SNSMO.......Smooths and filters a calibration SN table.  CUTOFF is
               the minimum summed weight from the smoothing function.
   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.
----------------------------------------------------------------
