A Statistical Analysis of the GPS Time Transfer Error Budget

Steven Hutsell

Abstract:	The Current GPS time transfer error budget, defined by the Navstar GPS Control Segment / US. Naval Observatory (USNO) Time Transfer Interfaces document, ICD-GPS-202, is based on criteria established in 1984 [7]. Since then, operations at both USN0 and the GPS Master Control Station (MCS) have sufficiently demonstrated that GPS time transfer is already well capable of providing service far superior to the performance required by this outdated budget. In the future, some users may require a time transfer error budget of 25 ns or less, far below the published specification of 110 ns. This paper will demonstrate that existing documentation and architecture already define a time transfer specification far below what is presented in ICD-GPS-202. ICD-GPS-202 is past due for an update to reflect this improved performance.
Published in:	Proceedings of the 51st Annual Meeting of The Institute of Navigation (1995) June 5 - 7, 1995 Antlers Doubletree Hotel Colorado Springs, CO
Pages:	421 - 428
Cite this article:	Hutsell, Steven, "A Statistical Analysis of the GPS Time Transfer Error Budget," Proceedings of the 51st Annual Meeting of The Institute of Navigation (1995), Colorado Springs, CO, June 1995, pp. 421-428.
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