AIPS HELP file for RADIUS in 31DEC25

As of Thu Nov 13 14:16:37 2025

HELP SECTION

RADIUS
Type:  Adverb  (scalar)
Use:   This adverb specifies a radius, usually a radius in an image in
       pixels.
Null value:
       0   => very large
Tasks:
   ALBUS.........Calculate ionospheric delay and Faraday rotation using
                 ALBUS.  RADIUS is max distance for data sources in km.
   CCSEL.........Select signifigant CC components.  RADIUS controls the
                 area over which Clean components are summed (in asec).
   IMFIT.........Fits Gaussians to portions of an image - RADIUS
                 controls fitting for the actual RMS which scales the
                 error estimates.
   JMFIT.........Fits Gaussians to portions of an image - RADIUS
                 controls fitting for the actual RMS which scales the
                 error estimates.
   QBEAM.........Plot holography data as contour image and outputs
                 interpolated image.
   SPCOR.........Task to correct an image for a primary beam and
                 spectral index.  RADIUS is the radius in pixels over
                 which the spectral index images are averaged.

EXPLAIN SECTION