AIPS HELP file for SMOOTH in 31DEC09

As of Sun Nov 22 17:04:01 2009

HELP SECTION

SMOOTH
Type: Adverb  (REAL(3))
Use:  SMOOTH specifies the type of spectral smoothing to be applied to
      a uv database or other spectra. The default is not to apply any
      smoothing. The elements of SMOOTH are as follows:
          SMOOTH(1) = type of smoothing to apply:
            0 => no smoothing
            1 => Hanning applied before bandpass calibration
            2 => Gaussian applied before bandpass calibration
            3 => Boxcar applied before bandpass calibration
            4 => Sinc (i.e. sin(x)/x) applied before bandpass cal.
            5 => Hanning applied after bandpass calibration
            6 => Gaussian applied after bandpass calibration
            7 => Boxcar applied after bandpass calibration
            8 => Sinc (i.e. sin(x)/x) applied after bandpass cal.
          SMOOTH(2) = the "diameter" of the function, i.e. width
            between first nulls of Hanning triangle and sinc function,
            FWHM of Gaussian, width of Boxcar. Defaults (if < 0.1) are
            4, 2, 2 and 3 channels for SMOOTH(1) = 1 - 4.
          SMOOTH(3) = the diameter over which the convolving function
            has value - in channels.  Defaults: 1, 3, 1, 4 times
            SMOOTH(2) used when input SMOOTH(3) < net SMOOTH(2).
      When applied to uv data, it is important to decide whether the
      smoothing should be applied before or after application of the
      bandpass calibration.  If SMOOTH was used in BPASS (or CPASS),
      then the same SMOOTH must be used with all the data (and
      SMOOTH(1) must be 1 through 4).  If SMOOTH was not used in
      BPASS, then SMOOTH(1) must be 5 - 8 for correct results.

Null Value:  0
      A null value of SMOOTH(1) means no smoothing is desired;
      the useage of null values for other parameters depend on
      the application.

EXPLAIN SECTION