Two-Way Satellite Time and Frequency Transfer (TWSTFT) Calibration Constancy From Closure Sums

Abstract

Two-way Satellite Time and Frequency Transfer (TWSTFT) is considered to be the most accurate means of long-distance time transfer, on the basis of its reported 1 ns repeat calibration consistency. This paper uses the closure sum technique to show that variations of the link-based component of the transfer data, in the absence of configuration changes, are largely subnanosecond in the European links. Two explanations for small, but non-zero, biases observed in the closure sums of uncalibrated data are presented.

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Document Details

Document Type
Technical Report
Publication Date
Dec 01, 2008
Accession Number
ADA503925

Entities

People

  • Andreas Bauch
  • Demetrios N. Matsakis
  • Dirk Piester
  • Lee Breakiron
  • Zhiheng Jiang

Organizations

  • United States Naval Observatory

Tags

Communities of Interest

  • Space

DTIC Thesaurus Topics

  • Artificial Satellites
  • Atomic Clocks
  • Calibration
  • Clocks
  • Correlators
  • Data Processing
  • Data Reduction
  • Electronic Components
  • Frequency
  • Geosynchronous Satellites
  • Ground Stations
  • Intervals
  • Measurement
  • Observation
  • Radio Signals
  • Reliability
  • Time Intervals

Readers

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

Technology Areas

  • Space