Changes

'''Global positioning system''' ('''GPS''') is a [[United States]] [[satellite]] system that lets those on the ground, on the water or in the air determine their position with extreme accuracy using GPS receivers.

'''Global positioning system''' ('''GPS''') is a [[United States]] [[satellite]] system that lets those on the ground, on the water or in the air determine their position with extreme accuracy using GPS receivers.

The system was developed by the US [[Department of Defense]] and made available to the general public in 1983 under orders of [[Ronald Reagan | President Reagan]]. GPS for civilian use used to include a mechanism called Selective Availability that intentionally limited the accuracy of GPS, a mechanism originally intended to confuse potential enemies who might launch a missile attack, but Selective Availability was disabled in 2000.

The system was developed by the US [[Department of Defense]] and made available to the general public in 1983 under orders of [[Ronald Reagan | President Reagan]]. GPS for civilian use used to include a mechanism called Selective Availability that intentionally limited the accuracy of GPS, a mechanism originally intended to confuse potential enemies who might launch a missile attack, but Selective Availability was disabled in 2000, and appears unlikely to be reinstated in the foreseeable future.

  [[Category:Telecommunications]]

  [[Category:Telecommunications]]