A Kalman Filter for Atomic Clocks and Timescales

Lee A. Breakiron

Abstract:	In a test of whether a Kalman filter could provide viable frequencies for atomic clocks, as well phases for a mean timescale, both simulated and actual hydrogen maser frequency data were processed with a two-state Kalman filter involving the parameters frequency and frequency drift and incorporating noise measurements based on Hadamard variances. Separate clock solutions were then combined and integrated to generate a mean timescale for the ensemble. Results for sampling times of up to at least several days indicate that such a timescale is even more stable than the one being used to steer the USNO Master Clock.
Published in:	Proceedings of the 33th Annual Precise Time and Time Interval Systems and Applications Meeting November 27 - 27, 2001 Hyatt Regency Long Beach Long Beach, California
Pages:	431 - 444
Cite this article:	Breakiron, Lee A., "A Kalman Filter for Atomic Clocks and Timescales," Proceedings of the 33th Annual Precise Time and Time Interval Systems and Applications Meeting, Long Beach, California, November 2001, pp. 431-444.
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