COLORADO SPRINGS, Colo. — The Defense Department has ended procurement of Global Positioning System satellites with hardware for a “selective availability” feature. The move implements in architecture ...

No audio available for this content. In a statement late Tuesday, the White House said that President Bush has agreed with the U.S. Department of Defense recommendation to permanently do away with ...

A function in the GPS navigation system that deliberately introduced random errors for civilian GPS receivers. It was implemented to prevent enemy troops on foreign soil from using the GPS system to ...

Eighteen years after the United States Air Force conducted developmental flight tests of two prototype GPS (global positioning system) receivers using ground-based pseudo-satellites, President Bill ...

With the almost-ubiquitous nature of GPS, it's hard to imagine that US government still maintains the ability to degrade the system's resolution or even just turn it off for national security reasons, ...