The U.S. Air Force has awarded Lockheed Martin a $1.5-billion contract for the third highly elliptical orbit (HEO-3) payload, the third geosynchronous orbit (GEO-3) satellite and associated ground modifications for the Space-Based Infrared System (SBIRS) constellation. A contract to include a fourth HEO payload and possible fourth GEO satellite is expected to be awarded later this year.
The SBIRS program is designed to provide early warning of missile launches, and simultaneously support other missions including missile defense, technical intelligence and battlespace awareness.
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