The Milstar system is the only survivable, endurable means that the President, the Secretary of Defense and the Commander, U.S. Strategic Command have to maintain positive command and control of the nation's strategic forces.
Of the five Milstar satellites on orbit, two are of the first-generation Block I design, launched in 1994 and 1995. The system graduated to a Block II design and the Air Force subsequently launched three of the Block II configuration between 2001 and 2003.
Each Milstar satellite in the constellation continues to perform with outstanding results, providing a protected, global communication network for the joint forces of the U.S. military and can transmit voice, data, and imagery, in addition to offering video teleconferencing capabilities.
The Milstar team is led by the Military Satellite Communications Systems Wing at the U.S. Air Force Space and Missile Systems Center, Los Angeles Air Force Base, California. Lockheed Martin Space Systems, Sunnyvale, Calif. is the prime contractor, satellite bus provider, lead systems integrator, and ground command and control provider.
In July 2007, a U.S. Air Force and Lockheed Martin team successfully reconfigured the Milstar constellation to maximize the system's capabilities and coverage. The successful realignment was a key step in paving the way for Milstar’s follow-on program, the protected and highly secure communications system, Advanced Extremely High Frequency (EHF). Advanced EHF satellites will increase data rates by a factor of five and the number of connections by a factor of two, permitting transmission of more tactical military communications, such as real-time video, battlefield maps and targeting data.
Lockheed Martin is progressing on the first three satellites in the Advanced EHF program, recently completing thermal vacuum testing on the second satellite at the company's Sunnyvale, California facilities. The first Advanced EHF spacecraft is planned for delivery to the Air Force in 2010.