Advanced Extremely High Frequency (satellite)

A constellation of satellites with associated ground stations, the Advanced Extremely High Frequency (AEHF) system is backwards-compatible with the previous generation of MILSTAR tactical communications satellites. AEHF offers significantly higher bandwidth. The program, managed by the United States Air Force, is common to other U.S. military services, and also is joint with Canada, the Netherlands, and the United Kingdon.

In the April 2009 Defense Department budget request, Secretary of Defense Robert Gates said he planned to cancel the Transformational Satellite System, still in the design phase, in favor of additional AEHF capacity.