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.