Lockheed delivers 3rd HEO

Lockheed Martin has delivered the third of four highly elliptical earth orbit (HEO) satellite payloads contracted by the U.S. Air Force as part of the Space Based Infrared System (SBIRS). Featuring a mix of satellites in geosynchronous orbit, the SBIRS program provides improved missile warning capabilities. The contracts include four HEO payloads, four GEO satellites, and ground assets to receive, process, and disseminate the infrared mission data. The first two HEO payloads were delivered in 2004 and 2005. Prior to its delivery, the HEO 3 payload successfully completed environmental and functional testing to demonstrate performance in family with HEOs 1 and 2. (Source: Lockheed Martin, 07/01/13) SBIRS is an A2100 satellite-based spacecraft, and work on the A2100 core's propulsion system, which positions the spacecraft in orbit, is done at Stennis Space Center, Miss. Previous