One-Way GPS Time Transfer 2000

Al Gifford, Scott Pace, Jules McNeff

Abstract:	On 1 May 2000, the White House issued a presidential directive for the Global Positioning System (GPS) to turn 08 Selective Availability (SA) on 2 May 2000. For nearly a decade, authorized user performance of one-way synchronization via GPS has improved every single year. This paper provides an annual assessment of how well the Global Positioning System can predict and disseminate UTC (USNO) to these specified users, based on data generated and processed by the United States Naval Observatory (USNO). And, because the recent Presidential directive now permits civilian timing users to exploit nearly the same, impressive time transfer accuracy of GPS, these annual metrics now offer a fairly representative performance assessment for both military and civilian timing users.
Published in:	Proceedings of the 32th Annual Precise Time and Time Interval Systems and Applications Meeting November 28 - 30, 2000 Hyatt Regency Reston Town Center Reston, Virginia
Pages:	137 - 146
Cite this article:	Gifford, Al, Pace, Scott, McNeff, Jules, "One-Way GPS Time Transfer 2000," Proceedings of the 32th Annual Precise Time and Time Interval Systems and Applications Meeting, Reston, Virginia, November 2000, pp. 137-146.
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