Kalman Filter Characterization of Cesium Clocks and Hydrogen Masers

Abstract

Our previous PTTI paper demonstrated that a two-state Kalman filter involving the parameters frequency and frequency drift, when properly implemented, produces frequencies for hydrogen masers that generate a stable mean timescale, at least for cases involving simulated and low-noise real data. The current paper extends the investigation to the noisier data actually employed in the USNO operational timescale. Results for about 500 days of postprocessed data for 12 masers and 51 cesium clocks indicate comparable frequency stabilities to those obtained with the currently operational timescale algorithm.

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Document Details

Document Type
Technical Report
Publication Date
Dec 01, 2002
Accession Number
ADA484008

Entities

People

  • Lee A. Breakiron

Organizations

  • United States Naval Observatory

Tags

Communities of Interest

  • Materials and Manufacturing Processes

DTIC Thesaurus Topics

  • Algorithms
  • Atomic Beam Masers
  • Change Detection
  • Clocks
  • Data Acquisition
  • Detection
  • Detectors
  • Filters
  • Frequency
  • Hydrogen
  • Kalman Filters
  • Low Noise
  • Masers
  • Measurement
  • Noise
  • Random Walk
  • Time Intervals

Readers

  • Adaptive Control and Estimation with Uncertainty in Dynamic Systems.
  • Positioning, Navigation, and Timing (PNT) Technology.