Timescale Algorithms Combining Cesium Clocks and Hydrogen Masers

Lee A. Breakiron

Abstract:	The USNO atomic, timescale, formerly based on an ensemble of cesium clocks, is now produced by an ensemble of cesium clock and hydrogen masers. In order to optimize stability and reliability, equal clock weighting has been replaced by a procedure reflecting the relative, time-varying noise characteristics of the two different types of clocks. correction of frequency drift is required, and residual drift is avoided by the eventual complete deweighting of the masers.
Published in:	Proceedings of the 23th Annual Precise Time and Time Interval Systems and Applications Meeting December 3 - 5, 1991 Pasadena, California
Pages:	297 - 302
Cite this article:	Breakiron, Lee A., "Timescale Algorithms Combining Cesium Clocks and Hydrogen Masers," Proceedings of the 23th Annual Precise Time and Time Interval Systems and Applications Meeting, Pasadena, California, December 1991, pp. 297-302.
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