It's the Passive Coherent radar aka PCR. Basically works by Collecting Reflected Signals bounced back by enemies Aircraft. Since it doesn't emit any Signals hence it's undetectable.(can only be detected if Seen). But how does it knows and classifies enemies from bird or own aircraft?(iff?)
I think this system takes each signal is reflected or generated by threat but what will happen if a autonomous system comes with a another jammer drone it can may be take out jammer drone but what about autonomous
