the problem with sattelites is that they have to be on a predictable course. any opponent able to reach space can destroy them. the communication to remotely piloted aircraft can also be jammed as part of an attack. it's why they could use an astro-inertial navigation system on the SR-71 that could not be jammed and would allow the pilot to sway from the planned course, but also go back on course. i can't believe they retired it. it closed a gap.