Postprocessed Timescales at the U.S. Naval Observatory

Abstract

A set of free-running timescales is generated using 9 gears of &fa from the USNO clock ensemble. Cesium and maser clock phases and frequencies are characterized by global fits to first- or second order polynomials, and the timescales are generated from the clocks' detrended frequencies using a variety of weighting functions. These timescales are compared to those generated by USNO's A.1, BIPM's ALGOS and TT98, and NIST's AT1 algorithms from the perspective of algorithm choice and frequency stability.

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Document Details

Document Type
Technical Report
Publication Date
Dec 01, 1998
Accession Number
ADA508556

Entities

People

  • Demetrios N. Matsakis
  • Lee A. Breakiron

Organizations

  • United States Naval Observatory

Tags

Communities of Interest

  • Materials and Manufacturing Processes

DTIC Thesaurus Topics

  • Accuracy
  • Algorithms
  • Calibration
  • Clocks
  • Covariance
  • Errors
  • Frequency
  • Frequency Standards
  • Intervals
  • Measurement
  • Observatories
  • Polynomials
  • Random Walk
  • Standards
  • Statistics
  • Time Interval Counters
  • Time Intervals

Readers

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