My last experience with military radar is over half a century old so I do not think I am gibing away valuable intelligence. Big high fast radar targets are the easiest. Small slow low targets are tough. We never saw bugs, cockroach to VW, but just about everything else. The question is what do you want to see, or more properly, locate. My unit wanted to locate low fast aircraft. If it was on the top side of the grass and moving over 200 kts we had’em. Just looking at the antennas of the USAF one can tell that they can see almost anything. In hindsight it turns out that they had that balloon from launch. OK, so now China knows that we can see into China well enough to locate a large but very slow mover, a very difficult object to locate. I wish that the Chinese were still guessing about that. Any attack coming will be better camouflaged.