Time Links for the Construction of TAI

Abstract

The American Global Positioning System (GPS) has served the principal needs of national timing laboratories for regular comparisons of remote atomic clocks for the last two decades. Single-channel GPS C/A-code common-view time transfer is, however, barely sufficient for comparison of today's atomic clocks within a few days, and certainly not sufficient for comparison of clocks currently being designed. For this reason the timing community is engaged in the development of new approaches to time and frequency comparisons, including techniques based on multi-channel GPS and the Russian Global Navigation Satellite System (GLONASS) C/A-code measurements, GLONASS P-code measurements, GPS carrier-phase measurements, temperature-stabilized antennas, standardization of receiver software, and two-way satellite time and frequency transfer through telecommunication satellites. This paper describes how the above-mentioned techniques can be used to meet TAI needs. Some of the techniques are already operational, and the others are expected to be introduced to meet the requirements of future higher accuracy clocks.

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Document Details

Document Type
Technical Report
Publication Date
Jan 01, 2000
Accession Number
ADA485069

Entities

People

  • J. Azoubib
  • Wlodzimierz Lewandowski

Organizations

  • International Bureau of Weights and Measures

Tags

Communities of Interest

  • Space

DTIC Thesaurus Topics

  • Accuracy
  • Artificial Satellites
  • Atomic Clocks
  • Clocks
  • Communication Systems
  • Construction
  • Frequency
  • Frequency Standards
  • Global Navigation Satellite Systems
  • Global Positioning Systems
  • Loran
  • Measurement
  • Navigation
  • Navigation Satellites
  • Phase Measurement
  • Standards
  • United States

Readers

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

Technology Areas

  • Space