Test begins on third AEHF

The third Advanced Extremely High Frequency (AEHF) satellite has begun transmitting using its protected communications payload, joining two other satellites undergoing system test in orbit with a suite of user terminals. AEHF satellites are produced by Lockheed Martin for the U.S. Air Force. Launched on Sept. 18, 2013, AEHF-3 arrived in its final orbit position and began transmissions in January. (Source: SpaceWar.com, 03/31/14) Previous Gulf Coast note: Core propulsion system work on the AEHF is done at Stennis Space Center, Miss.