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Time transfer by laser link between China and France

Published online by Cambridge University Press:  01 October 2007

C. Zhao ,
W. T. Ni  and
E. Samain
C. Zhao
Affiliation:
Center for Gravitation and Cosmology, Purple Mountain Observatory, Chinese Academy of Sciences, Nanjing 210008, China. email: zhaocheng@pmo.ac.cn, wtni@pmo.ac.cn Graduate University of Chinese Academy of Sciences, Beijing 100049, China.
W. T. Ni
Affiliation:
Center for Gravitation and Cosmology, Purple Mountain Observatory, Chinese Academy of Sciences, Nanjing 210008, China. email: zhaocheng@pmo.ac.cn, wtni@pmo.ac.cn
E. Samain
Affiliation:
Observatoire de la Côte d'Azur, UMR Gemini, Caussols, 06460France. email: etienne.samain@obs-azur.fr
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Abstract

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To advance from milli-arcsecond to micro-arcsecond astrometry, time keeping capability and its comparison among different stations need to be improved and enhanced. The T2L2 (Time transfer by laser link) experiment under development at OCA and CNES to be launched in 2008 on Jason-2, allows the synchronization of remote clocks on Earth. It is based on the propagation of light pulses in space which is better controlled than propagation of radio waves. In this paper, characteristics are presented for both a common view and non-common view T2L2 comparisons of clocks between China and France.

Keywords

timestandardsastrometry
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 3 , Symposium S248: A Giant Step: from Milli- to Micro-arcsecond Astrometry , October 2007 , pp. 298 - 299
Copyright
Copyright © International Astronomical Union 2008

References

Guillemot, P. & Samain, E. et al. 2006, in proc of the IFCS 2006., p. 771Google Scholar
Samain, E. & Weick, J. et al. 2006, International Journal of Modern Physics D, in press.Google Scholar
Yang, F. M 2001, Surveys in Geophysics, D22, p. 465Google Scholar