Boeing has developed “optimized transmitter settings” for the GPS IIF spacecraft to support reactivation of the M-code (or military-specific signal), according to an industry official. The U.S. Air Force switched off the M-code on the first GPS IIF spacecraft, which was launched May 27, 2010, owing to discoveries related to signal strength during factory testing (Aerospace DAILY, June 21). When the first IIF “entered operational service, the Air Force configured the vehicle with all ...


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