selective availability

SA was the intentional degradation of the accuracy in GPS clocks by the U.S. Department of Defense to create erroneous orbital data to introduce inaccuracy with GPS receivers; the intentional pseudorange error in GPS signals created by the DOD as a measure of national security to prevent Anon-military receivers from obtaining high accuracy position information. SA was turned off on May 1, 2000 by order of President Clinton.

Authorization Path: 2.5.6.4.23.0