SPECTRAL_CLEAN DUAL
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SPECTRAL_CLEAN DUAL

              [BUNDLES\]SPECTRAL_CLEAN DUAL NSmooth

        In  DUAL  mode, SPECTRAL_CLEAN cleans a (spectrally) smoothed version of
        the data cube, and the difference between this smooth  version  and  the
        original ones. The two Clean component tables are then merged to restore
        the final image using UV_RESTORE.

        NSmooth is the number of channels being smoothed together.

        The DUAL methods involves Cleaning two data  cubes,  so  is  a  somewhat
        slower than a simple CLEAN.  SPCLEAN%MEMORY indicates whether intermedi-
        ate results are kept in memory (faster) or on temporary  files  (slower,
        but allowing to work on larger files).

        Mode  MULTI should in general be preferred, but does not include the fi-
        nal UV_RESTORE.