UV_STAT Mosaics

        UV_STAT  handles  Mosaic  like  Single-Field  for  the  weighting (BEAM,
    BRIGGS, TAPER and WEIGHT arguments): all visibilities  are  considered,  in-
    stead  of those of just one among the various fields.  Accordingly, the pre-
    dicted beam sizes are often underestimated compared to what UV_MAP  and  FIT
    commands would yield.

    For  a fine adjustment of the beam shape and size, it is recommended to ver-
    ify using UV_MAP and FIT commands and iterate if needed.