[CALIBRATE\]AMPLITUDE F1 [... Fn] [/ANTENNA N1 [... Nn]] /FILE UvINn[UvOut]
Apply the specified amplitude factor(s) for all or the indicated antennas
to rescale the visibilities and weights. Visibilities are read in UV table
indicated by UvIN and written in UvOut, or updated in UvIn if no UvOut is specified.