|For years, The Naval Research Laboratory (NRL) Advanced PNT branch has been operating an ensemble timescale to achieve a realization of UTC. Recently, NRL developed a second timescale using a separate measurement system. Having a second timescale increases the resilience of NRL’s UTC realization. Each timescale can be used to cover gaps or correct anomalies in the other. A second timescale will allow NRL to provide a continuous UTC realization even if one timescale has to be interrupted for maintenance or transportation. To make the second timescale a viable alternative, NRL uses a LQC Gaussian steering algorithm to steer the two timescales together. This paper describes the formation of a timescale from an ensemble of atomic clocks. Two timescales derived from different measurement systems are presented and compared to demonstrate the steering algorithm and general ensemble stability.
Proceedings of the 53rd Annual Precise Time and Time Interval Systems and Applications Meeting
January 25 - 27, 2022
Hyatt Regency Long Beach
Long Beach, California
|243 - 258
|Cite this article:
Zhu, Jeffrey, Coleman, Michael J., "Increasing the Resilience of a UTC Realization by Steering Multiple Ensembles," Proceedings of the 53rd Annual Precise Time and Time Interval Systems and Applications Meeting, Long Beach, California, January 2022, pp. 243-258.
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