[CLEAN\]UV_STAT BEAM [Show]
Evaluate the expected synthesized beam size and orientation, based on
current imaging parameters MAP_UVCELL, MAP_ROBUST, MAP_UVTAPER.
If argument Show is present, the synthesized beam is also displayed.
A fast gridding is used for this command to minimize computing time, so
the actual synthesized beam produced by UV_MAP will be (very slightly)
different. This does not significantly affect the beam size.