"Dom" satellite antenna
What looks a bit like a camping grill in the picture is a portable satellite antenna. A small parabolic antenna is installed under the plastic dome, which thanks to servomotors and built-in "GPS" automatically aligns itself with the satellite. Due to the fast response time, such antennas can even be operated on boats or while driving in traffic.
A clear view of the satellite remains a prerequisite. Since the small parabolic antenna inside is not very strong, you should be in the core of the satellite's footprint.