USNO Master Clock Design Enhancements
Abstract
The authors have implemented several enhancements to the U.S. Naval Observatory (USNO) Master Clock system. Design changes to the system include the use of a Kalman filter for phase and frequency estimates, decreasing the time interval between steers, and the redesign of control parameters. The present control system utilizes "real-time" data estimates of the differences between the Master Clock and a time scale that combines hydrogen masers and commercial cesium frequency standards with a time-varying weighting scheme. They are researching a Master Clock system design that utilizes as its reference a hydrogen maser ensemble that is steered to an ensemble of cesium standards. This paper presents system designs, simulations, and performance data.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 01, 2007
- Accession Number
- ADA474268
Entities
People
- D. Johns
- J. Skinner
- P. Koppang
Organizations
- United States Naval Observatory