The U.S. Air Force and United Launch Alliance (ULA) are planning to loft Boeing GPS IIF satellite 4 on May 15 between 5:38-5:56 p.m. local time. The satellite will carry an improvement to the precision clock and it will be the first to launch on the Atlas V rocket, says Col. Stephen Steiner, chief of the space division at the service’s GPS directorate in Los Angeles. With 12 GPS IIF satellites ordered, the Air Force had long planned to introduce the Atlas V into the launch program for ...


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