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Global Positioning System: Difference between revisions
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*By December 1993 the GPS system achieved initial operational capability<ref>United States Department of Defense. [http://www.navcen.uscg.gov/ftp/gps/ARCHIVES/gpsdoc/IOCLTR.TXT Announcement of Initial Operational Capability]. [[December 8]], [[1993]].</ref> | *By December 1993 the GPS system achieved initial operational capability<ref>United States Department of Defense. [http://www.navcen.uscg.gov/ftp/gps/ARCHIVES/gpsdoc/IOCLTR.TXT Announcement of Initial Operational Capability]. [[December 8]], [[1993]].</ref> | ||
*By [[January 17]], [[1994]] a complete constellation of 24 satellites was in orbit. | *By [[January 17]], [[1994]] a complete constellation of 24 satellites was in orbit. | ||
*In 1996, recognizing the importance of GPS to civilian users as well as military users, U.S. President | *In 1996, recognizing the importance of GPS to civilian users as well as military users, U.S. President Bill Clinton issued a policy directive<ref>[[National Archives and Records Administration]]. [http://clinton4.nara.gov/textonly/WH/EOP/OSTP/html/gps-factsheet.html U.S. GLOBAL POSITIONING SYSTEM POLICY]. [[March 29]], [[1996]].</ref> declaring GPS to be a dual-use system and establishing an [[Interagency GPS Executive Board]] to manage it as a national asset. | ||
*In 1998, U.S. Vice President [[Al Gore]] announced plans to upgrade GPS with two new civilian signals for enhanced user accuracy and reliability, particularly with respect to aviation safety. | *In 1998, U.S. Vice President [[Al Gore]] announced plans to upgrade GPS with two new civilian signals for enhanced user accuracy and reliability, particularly with respect to aviation safety. | ||
*On [[May 2]], [[2000]] "Selective Availability" was discontinued, allowing users outside the US military to receive a full quality signal. | *On [[May 2]], [[2000]] "Selective Availability" was discontinued, allowing users outside the US military to receive a full quality signal. | ||
