UV_FILTER /ZERO

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UV_FILTER /ZERO

            [CLEAN\]UV_FILTER [/RESET] /ZERO [/CHANNELS Channel_List]
          [/FREQUENCY F1 [... [Fn]] [/VELOCITY V1 [... [Vn]]
          [/RANGE Min Max [TYPE]] [/WIDTH Width [TYPE]]

        Erase filtered channels (set weight and  visibilities  to  zero)  rather
        than  simply  flagging  them (weight set to negative value). This can be
        more convenient for further display, but is not reversible.

        By default, channels to be filtered are flagged (weights becoming  nega-
        tive,  and  data can be unflagged by UV_FLAG).  Flagged channels are ig-
        nored in the averaging process, such as UV_RESAMPLE or UV_CONT.   Howev-
        er,  as  UV_MAP (in general) uses only one channel to define the weights
        for all others, these flagged channels will nevertheless appear  in  the
        imaged data cube.

        See UV_CHECK for information about handling flagged channels and differ-
        ent beams in a single UV table.