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 conve-
    nient for further display, but is not reversible.

    By default, channels to be filtered are flagged (weights becoming  negative,
    and  data can be unflagged by UV_FLAG).  Flagged channels are ignored in the
    averaging process, such as UV_RESAMPLE or UV_CONT.  However, 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  different
    beams in a single UV table.