Elon Musk's recent tweet shows a video clip of a modest-sized dish on fairly fast-slewing mount located:
At SpaceX Boca Chica launch site in Texas
In the question Why is the reflector on this millimeter-wave antenna spinning? I show another dish antenna used for tracking spacecraft (one image (GIF) shown below) and the rotating secondary is used to sense the direction of motion of the target so that as it moves away from the dishes direction, it can detect the direction and slew back again to continue to track the object.
Almost for sure that's the reason for the four parabolic dishes merged into one in the standard "Romashka"("Chamomile") telemetry station... installed at all tracking stations and ships. shown in @A.Rumlin answer to the question Where is the “antenna farm” from which this Soyuz launch photo was taken?.
Even some DSN antennas have experimented with electronically rotating offsets.
But this dish does not appear to have any method to sense the offset direction in order to track. Instead, at the focus there looks like only enough room for one feed horn. How does it track?
above: cropped from here