New Steering Strategies for the USNO Master Clocks

Abstract

All U.S. Naval Observatory (USNO) steering situations involve compromises to minimize the degradation of short-term stability of a steered clock while gaining maximal benefits from the long-term stability of the reference. In the case of steering UTC(USNO) to UTC, extra complications arise due to the 30-day data interval and the 15-day delay associated with the transfer of new information. A technique that minimizes the amount of control required to steer the USNO mean to UTC will be presented. Different strategies designed for optimal steering of UTC(USNO) and a backup master clock system located at the USNO will be described. Some of these strategies involve steering a maser to an intermediate mean that is steered to an extrapolation of UTC. Examples of optimal steering on real data will be reported.

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Document Details

Document Type
Technical Report
Publication Date
Dec 01, 1999
Accession Number
ADA496156

Entities

People

  • Demetrios N. Matsakis
  • Paul A. Koppang

Tags

Communities of Interest

  • Autonomy

DTIC Thesaurus Topics

  • Algorithms
  • Atomic Beam Masers
  • Backup Systems
  • Clocks
  • Computer Programs
  • Control Systems
  • Department Of Defense
  • Frequency
  • Frequency Standards
  • Intervals
  • Kalman Filtering
  • Kalman Filters
  • Masers
  • Standards
  • Steering
  • Time Intervals
  • United States

Readers

  • Positioning, Navigation, and Timing (PNT) Technology.
  • Systems Analysis and Design