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U.S. Air Force — Positions Themselves For Improved Global Positioning

The U.S. Air Force Global Positioning Systems Wing and the 50th Space Wing are ushering in improved Global Positioning System (GPS) capabilities through a new ground system software release.  New capabilities include telemetry, tracking and commanding for the new GPS IIF space vehicle and robust security improvements. The planned transition at Schriever Air Force Base on January, 11, 2010, is the result of extensive testing to ensure this upgrade is transparent and has no impact to military and civil users.

GPS is a space-based, world-wide navigation system providing users with highly accurate, three-dimensional position, velocity and timing information 24 hours a day in all weather conditions. Boeing has been the prime contractor for most GPS satellites and is under contract to build 12 next-generation GPS Block IIF satellites Courtesy of Boeing


GPS is a space-based, world-wide navigation system providing users with highly accurate, three-dimensional position, velocity and timing information 24 hours a day in all weather conditions. Boeing has been the prime contractor for most GPS satellites and is under contract to build 12 next-generation GPS Block IIF satellites Courtesy of Boeing
With the pending mid-2010 launch of the first GPS IIF space vehicle, the ground system is prepared to command the new on-orbit GPS IIF capabilities which include a new navigation signal for civil users, encrypted military code, crosslink enhancements, improved navigation signal accuracy and signal power increases.  The new software also provides robust security improvements to include “over-the-air” distribution of encryption keys to properly equipped military users.  Preparation for activation of the new software included rigorous developmental and operational testing events including five transition exercises.  The new ground system software commanded current individual GPS satellites during numerous testing events and rehearsals.  In November and December 2009, the new software successfully uploaded operational GPS IIA and IIR space vehicles with navigation data and completed normal operational functions.  This improvement initiative continues the Air Force’s commitment to the global community of GPS users. The Air Force will continue to pursue an achievable path maintaining GPS as the premier provider of positioning, navigation and timing for military and civilian users around the world.