Spooks in the Wire
In a day and age of reduced defense spending, it's smart to maintain traditional low-band facilities. Satellites, because of their complexity and cost, are not very fail-safe. One can launch a two-billion dollar satellite and deploy another 500 million worth of receiver appliances only to have the thing turn it's antennas towards Jupiter rather than Earth; necessitating a shuttle launch 18 months later at a cost of 900 million to fix it. Only to have it disabled by space debris 10 months later. It's replacement blows up on the launch-pad.
Shortwave is pretty idiot-proof. If you have the space for an antenna, and some electrical power, you can deploy anywhere on very short notice. I'm sure the military has not forgotten this.