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SBIRS GEO-4 integration under way

Lockheed Martin has delivered the payload for the US Air Force's (USAF's) fourth Space Based Infrared System (SBIRS) Geosynchronous Earth Orbit (GEO) satellite, the company announced on 8 October. Lockheed Martin is the SBIRS prime contractor, while Northrop Grumman manufactures the payload, which

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