1 UV_CLIP
        UV_CLIP

    Clip UV data to suppress grossly discrepant values.   All  channels  are
    flagged   if   any   channel   between   the  first  and last considered
    (specified by CHANNELS$) has an amplitude greater than VCLIP$.   Clipped
    channels are set to zero amplitude and zero weight.
2 UVDATA$
        TASK\CHARACTER "UV table"       UVDATA$

    Input / Output UV table.
2 VCLIP$
        TASK\REAL      "Clipping value" VCLIP$

    Absolute  amplitude  threshold.   In   fact,   data   is   clipped    if
    abs(Real)  or  abs(Imag)  is  greater than VCLIP$, which is only a rough
    clipping threshold.
2 CHANNELS$
        TASK\INTEGER   "First and last channel to consider" CHANNELS$[2]

    First  and  last  channel  to   look   for   clipping.    To    preserve
    synthesized  beam  consistency,  all  channels  (including those outside
    CHANNELS$ interval) are clipped  if  one  channel  within  the  interval
    defined by CHANNELS$ is found bad.
1 END