The Accuracy of Two-Way Satellite Time Transfer Calibrations

Lee A. Breakiron, Alan L. Smith, Blair C. Fonville, Edward Powers, Demetrios N. Matsakis

Abstract:	Results from successive calibrations of Two-Way Satellite Time and Frequency Transfer (TWSTFT) operational equipment at USNO and five remote stations using portable TWSTFT equipment are analyzed for internal and external errors, finding an average random error of ±0.35 ns, an average type-B uncertainty of ±0.15 ns, and an average total error of ±0.38 ns for a single calibration measurement over time spans of up to 4.9 years. Closure discrepancies suggest that the operational apparatus is at least as good as the calibration equipment.
Published in:	Proceedings of the 36th Annual Precise Time and Time Interval Systems and Applications Meeting December 7 - 9, 2004 Hyatt Regency Washington on Capitol Hill Washington, D.C.
Pages:	139 - 148
Cite this article:	Breakiron, Lee A., Smith, Alan L., Fonville, Blair C., Powers, Edward, Matsakis, Demetrios N., "The Accuracy of Two-Way Satellite Time Transfer Calibrations," Proceedings of the 36th Annual Precise Time and Time Interval Systems and Applications Meeting, Washington, D.C., December 2004, pp. 139-148.
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