JSTARS
E-8C Joint Surveillance Target Attack Radar System
CNN 'info' below.
Didn't even say that the RADAR uses Dopplar shift to tell which direction a vehicle is traveling. And can even tell the difference between a tank and a truck.
Primary function: Airborne battle management; surveys enemy's ground positions; relays info in real-time to ground stations.
Speed: Optimum orbit speed 448 mph - 587 mph Crew: 4 flight crew, w/ 15 Air Force and 3 Army specialists (varies according to mission)
Source: U.S. Air Force
ABC Does J-Stars3/20/03 Planes | 911 War Index