Details at the National Geodetic Survey homepage (http://www.ngs.noaa.gov/)
President Clinton announces
removal of GPS Selective Availability
Today (May 1, 2000) the White House announced the decision by
President Clinton to terminate GPS Selective Availability (SA)
as
of tonight, midnight UTC. The deactivation of SA throughout the
GPS constellation will take approximately 8 to 10 hours. It is
anticipated that this will immediately improve unaugmented,
single
receiver GPS positioning to better than 20 meters (and probably
better than 10 meters) accuracy. The expected improvement will
vary depending upon the particular receiver and the level of
solar
disturbance in the ionosphere.