It's not trivial. Beams could be narrow and could only be on for short periods of time. Combine that with all kinds of noise, stray signals, and other false pos

It's not trivial. Beams could be narrow and could only be on for short periods of time. Combine that with all kinds of noise, stray signals, and other false positives, and you'd still be searching for a needle in a haystack. It's not clear what frequency to even look for...