Agreed. This is not a game; it really is war.
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I think you mean remote viewing. Remote sensing is performed every time someone points a camera out of the window.
..you get it
Dicks, pussies and assholes
Transponders of this type don't demodulate the uplink signal. They just convert to a different frequency and amplify the downlink signal. You could do the same thing with a C-band satellite, but the hardware to operate in 4-6GHz at >100W is expensive and you need a big reflector. At UHF, you can do it at lower power with cheap parts.