Research Activities on Remote Synchronization System for Remote Crystal Oscillators of Quasi-Zenith Satellites

Toshiaki Iwata, Takashi Matsuzawa, Masato Fukui, Yuji Hashibe

Abstract:	The remote synchronization system for the onboard crystal oscillators (RESSOX) of QZSS has been studied at AIST since 2003. RESSOX reduces the overall cost and satellite power consumption, as well as the onboard weight and volume, and has a longer lifetime than a system with an onboard atomic time standard. The targets of our research are synchronization to within 10 ns between the ground station time standard and the onboard QZSS crystal oscillators and stability better than 1×10-13 at 100,000 s. RESSOX has been developed in four stages: (1) arrangement of hardware simulators and feasibility study, (2) QZSS experiment preparation, (3) RESSOX algorithm development, and (4) space experiments using geostationary satellites (GEOs). In the future, after launch, one more stage will be added: (5) demonstration of RESSOX using QZSS. In this paper, the achievements in the first four stages and a plan of the final stage will be summarized.
Published in:	Proceedings of the 2009 International Technical Meeting of The Institute of Navigation January 26 - 28, 2009 Disney's Paradise Pier Hotel Anaheim, CA
Pages:	265 - 275
Cite this article:	Iwata, Toshiaki, Matsuzawa, Takashi, Fukui, Masato, Hashibe, Yuji, "Research Activities on Remote Synchronization System for Remote Crystal Oscillators of Quasi-Zenith Satellites," Proceedings of the 2009 International Technical Meeting of The Institute of Navigation, Anaheim, CA, January 2009, pp. 265-275.
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