Time Links for the Construction of TAI

J. Azoubib, W. Lewandowski

Abstract:	The American Global Positioning System (GPS) has served the principal needs of national timing laboratories for regular comparisons of remote atomic clucks for the last two decades. Single-channel GPS CIA-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 mu&-channel GPS and the Russian Global Navigation Satellite System (GLONASS) CIA-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 TAl 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.
Published in:	Proceedings of the 32th Annual Precise Time and Time Interval Systems and Applications Meeting November 28 - 30, 2000 Hyatt Regency Reston Town Center Reston, Virginia
Pages:	181 - 194
Cite this article:	Azoubib, J., Lewandowski, W., "Time Links for the Construction of TAI," Proceedings of the 32th Annual Precise Time and Time Interval Systems and Applications Meeting, Reston, Virginia, November 2000, pp. 181-194.
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