Time Comparisons by GPS C/A, GPS P3, GPS L3 and TWSTFT at KRISS

Sung Hoon Yang, Chang Bok Lee, Young Kyu Lee, Ji Ae Han, Yun Jeon Heo

Abstract:	We present an overview of time transfer activities at Korea Research Institute of Standards and Science (KRISS). During the last few years, we have equipped the geodetic receivers for P code and carrier phase measurements, and built two-way satellite time and frequency transfer (TWSTFT) system to improve the time comparison accuracy. Now, we are conducting the time comparisons between KRISS and National Institute of Information and Communications (NICT, Japan) including several institutes in Asia using various GPS time transfer methods such as GPS C/A code, P3 code, carrier phase, and TWSTFT techniques. The equipment for time transfers are TTR6, 3S-R100, Euro-80, and a geodetic receiver (Z12-T) for GPS link, and multi-channel TWSTFT via JCSAT-1B satellite for two-way link. From the all data, we have compared and evaluated the differences between the various comparison methods by GPS versus TWTSTF.
Published in:	Proceedings of the 37th Annual Precise Time and Time Interval Systems and Applications Meeting August 29 - 31, 2005 Vancouver, Canada
Pages:	716 - 720
Cite this article:	Yang, Sung Hoon, Lee, Chang Bok, Lee, Young Kyu, Han, Ji Ae, Heo, Yun Jeon, "Time Comparisons by GPS C/A, GPS P3, GPS L3 and TWSTFT at KRISS," Proceedings of the 37th Annual Precise Time and Time Interval Systems and Applications Meeting, Vancouver, Canada, August 2005, pp. 716-720.
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