jianjie

LIU Li¹, HAN Chun-hao²
(1. Institute of Surveying and Mapping, Information Engineering University, Zheng -zhou 450052, China;
2. Institute of Geodesy and Geophysics, Chinese Academy of Sciences, Wuhan 430077, China)

In this paper, the development process and the basic theory of Two Way Satellite Time Transfer (TWSTT) are introduced. Then the error sources of TWSTT are discussed, and the influence of the error sources to the transfer accuracy is analyzed. The results show that the equipment delay error and the propagation delay error are the major error sources in the TWSTT, but the errors which caused by motion of the earth stations and the satellite are small. At last, in the difference transfer accuracy, we give the results that what error sources must be considered and what accuracy of the error sources must be achieved.