I mean, do you want me to really guess?
These guys probably have full spectrum SDR with foolish throughput and can listen and record anything with a radio. They can probably transmit and overpower any signal with capabilites on board as well. They can probably track frequency hopping comms. And probably more.
Sorry, I'm tired of people guessing and then those guesses derailing the conversation because nobody can be arsed to write anything down. It doesn't help there's an entire mountain of disinfo pouring in either. Cite your sources.
It'd be nice if people went to other threads than the general as well.