Time Dissemination at Shanghai Observatory

Zhuang Qixiang

Abstract:	After a brief review of the historic status of HF standard frequency and time signal transmission (call signs are BPV and XSG respectively) at Shanghai Observatory(SO) ,this paper describes recent progress in time comparison and synchronization at SO, including Loran C,TV synchronization,portable clock,laser pulses and geostationary satellite methods. Finally,the planned international T/F links between SO and other T/F laboratories will also be presented,such as the utilization of the ranging signals of the Japanese Geostationary Meteorological Satellite,the Global Positioning System (GPS) and the VLBI technology .
Published in:	Proceedings of the 17th Annual Precise Time and Time Interval Systems and Applications Meeting December 3 - 5, 1985 DuPont Plaza Hotel Washington, DC
Pages:	277 - 286
Cite this article:	Qixiang, Zhuang, "Time Dissemination at Shanghai Observatory," Proceedings of the 17th Annual Precise Time and Time Interval Systems and Applications Meeting, Washington, DC, December 1985, pp. 277-286.
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