Analysis of One Year of Zero-Baseline GPS Common-View Time Transfer and Direct Measurement Using Two Co-Located Clocks

Gerrit de Jong, Erik Kroon

Abstract:	As part of the Galileo project of Early Trials on Time Synchronization Techniques and Calibration Issues, the (near) zero-baseline GPS Common-View Time Transfer and Direct Measurement (using a Time Interval Counter) results between the time scales of two co-located clocks during 2001 were analyzed. This was done to identify the obtainable uncertainty levels with these techniques. The result of the analysis is presented. The baseline of the antennas of the two single-channel NBS-type GPS C-V receivers was 2 m, so multi-path influence is not excluded. The uncertainties from statistical origin (Type A evaluation) were determined by means of MDEV and TDEV. The uncertainties from other sources (Type B evaluation) were determined from calibrations. The TDEV of the GPS C-V result was less than 0.4 ns at averaging times > 1 day, and at shorter averaging times TDEV was about 1 ns.
Published in:	Proceedings of the 34th Annual Precise Time and Time Interval Systems and Applications Meeting December 3 - 5, 2002 Hyatt Regency Reston Town Center Reston, Virginia
Pages:	29 - 38
Cite this article:	de Jong, Gerrit, Kroon, Erik, "Analysis of One Year of Zero-Baseline GPS Common-View Time Transfer and Direct Measurement Using Two Co-Located Clocks," Proceedings of the 34th Annual Precise Time and Time Interval Systems and Applications Meeting, Reston, Virginia, December 2002, pp. 29-38.
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