To the left of that cell phone antenna there is a small cylindrical antenna. At least that's what it looks like from the .5 megapixel shot the OP took of it. We have those on battalion vehicles at my work. I have always assumed they are the UHF antenna. If that is the case then no, he is not communicating with any satellites. Amateur satellite uplink and downlink is 2 meter and 70 cm. If it is radio comm then he is probably listening in on the local 800 channels, maybe to fire dispatch or police.
Could be for 4g mobile data service. I have one sitting on my desk. We install them in our ambulances for data connectivity on 4g/LTE