Selective Availability (SA) of the Global Positioning System (GPS) was tested from March 25 to August 28, 1990. The objective of SA is to degrade the positioning accuracy of civilian GPS users by intentionally adding errors to the broadcast ephemerides and satellite clocks of the GPS navigation message. SA is expected to be fully implemented by about mid-1993. Presently, only Block II GPS satellites have full SA capability.


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    Title :

    Observations and Analysis of Selective Availability in GPS


    Contributors:
    M. Murata (author) / M. Harigae (author)

    Publication date :

    1991


    Size :

    22 pages


    Type of media :

    Report


    Type of material :

    No indication


    Language :

    English




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