On Tuesday, Lockheed Martin (LMT 1.23%) announced it has won a $100 million contract to sustain the ground control segment of the U.S. Air Force's GPS satellite constellation.

The contract, awarded through the U.S. Air Force Space Command Space and Missile Center in service of the Air Force Space Command 2nd Space Operations Squadron, runs from this month through June 2019. Among other services, Lockheed will be responsible for supporting the squadron's command and control ground systems, systems engineering, hardware and communications engineering, space vehicle and ground equipment simulation, software testing, and hardware maintenance.

In a press release, Lockheed said it will be retaining the services of privately held Arctic Slope Research Corp., ISYS Technologies, Overlook Systems Technologies, and Tigua Technology Services to assist it on the contract. 

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