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Capt. Adam Moody, 2SOPS GPS Operations Support flight commander, and Staff Sgt. Carl Ellinger, 2 SOPS GPS mission chief, review a checklist of procedures for a transfer operation at Schriever Air Force Base. (U.S. Air Force photo/Dennis Rogers)

Lockheed completes COTS upgrade of ground control system

December 1, 2016

Photo: Iridium

Iridium launches alternative GPS PNT service

May 23, 2016