The Space-Based Infrared System (SBIRS) is a consolidated system intended to meet the United States’ infrared space surveillance needs through the first two to three decades of the 21st century. The SBIRS program is designed to provide key capabilities the areas of missile warning (MW), missile defense (MD) and battlespace characterization.
SBIRS is an integrated “system of systems” that will include satellites in geosynchronous orbit (GEO), sensors hosted on satellites in highly elliptical orbit (HEO), and ground-based data processing and control. SBIRS ground software integrates infrared sensor programs of the U.S. Air Force (USAF) with new IR sensors. SBIRS continues to struggle with cost overruns…. By September 2007, the expected project cost had increased to $10.4 billion
The original contract consisted of 2 HEO satellite sensors and 2-3 GEO sensors (and satellites) with an option to buy a total of 5 GEOs.
Lockheed Martin’s SBIRS contracts include four highly elliptical orbiting (HEO) payloads, four GEO satellites, and ground assets to receive, process, and disseminate the infrared mission data. Lockheed Martin expects to receive funding to begin long lead parts procurement for the fifth and sixth GEO satellite by the end of the year (2012).
Lockheed Martin has received the GEO-4 (May 2012). The GEO-4 structure, identical to the previous three SBIRS GEO spacecraft, is made from lightweight, high-strength composite materials designed to withstand the accelerations and vibrations generated during launch and support the spacecraft throughout on-orbit operations. According to Lockheed Martin “Delivery of the SBIRS GEO-4 core structure is a major milestone indicating the program is continuing to meet its commitments….Based on lessons learned from the first two SBIRS geosynchronous satellites, production of GEO-3 and GEO-4 is proceeding very well. In addition, we have a number of affordability initiatives in place jointly with the Air Force to continually reduce the cost of each follow-on SBIRS satellite.”
Excerpts, Lockheed Martin Delivers Core Structure for Fourth SBIRS Satellite, Press Release Lockheed Martin, May 24, 2012
See also US Air Force