AMPLITUDE

          [CALIBRATE\]AMPLITUDE  F1  [.. Fn]  [/ANTENNA N1 [... Nn]] [/FILE UvIN
    [UvOut]]

      Apply the specified amplitude factor(s) for all or the indicated  antennas
    to  rescale  the visibilities and weights.  The command works on the current
    UV data unless tha /FILE option is present.