BEAM_STEP

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BEAM_STEP

          BEAM_STEP   Integer

        Number of channels per synthesized beam plane.

        Default  is 0, meaning only 1 beam plane for all channels.  N (>0) indi-
        cates N consecutive channels will share the same dirty beam.

        A value of -1 can be used to compute the number  of  channels  per  beam
        plane  that  ensures that the angular scale does not deviate more than a
        fraction of the map cell at the map edge. This fraction is controlled by
        variable MAP_PRECIS (default 0.1)