AIPS HELP file for NCHAV in 31DEC09

As of Sat Nov 21 20:24:21 2009

HELP SECTION

NCHAV
Type: Adverb   (scalar)
Use:  To specify the number of channels (usually spectral channels) to
      be "averaged" together in some operation.  Note that imaging
      programs "average" channels by gridding them separately into the
      same output image using the u,v,w's corrected for each channel
      frequency.
Null value:  0
Tasks:
  IMAGR......Converts visibility data into images, performing
             deconvolutions as desired.  NCHAV specifies the number of
             spectral channels contributing to each output image.
  SPLIT......Applies calibration and flagging to multi-source
             visibility data, producing single-source data files.
             NCHAV is the number of input spectral channels averaged
             (in the usual sense) into each output spectral channel.

EXPLAIN SECTION