Some of the R area near Edwards AFB and Ft Irwin Army Base covers the
"Goldstone Communications" center. That is the local "space communications"
for Huston Control and any of the shuttles that may be flying and the
International Space station.. also any far reaching exploring missions that
are out there.. Don't ever expect to get cleared to close to that antenna..
so you don't block their reception.

This is for your own protection.
Some of those transmitters will put out enough radiated power in a very tight
beam that at normal altitudes (not the FL's) it would make a microwave oven
look like a childs toy.