Years ago, I got a call from AT&T asking if I still had my security clearance. It seems they needed a cleared tech to go install a station package at the "Jordan Lake Space Surveilance Station" near Montgomery, AL. I thought they were kidding, or meant near huntsville. But in the middle of the cow pasture was a 1200' long antenna array that throws a fan like beam up into space, and when a satellite passes through it, the signal is recieved in a similar RX only station in GA. They told me what their EIRP was and it was in the 10 megawat range AVERAGE power. The master station was a megawatt out of the transmitter, and nearly a gigawatt EIRP.
I checked the sectional chart to see if there was any warning for pilots, but at least for the alabama site, there wasn't.