【摘 要】
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In this paper, we systematically discussed and analyzed the uncertainties of four typical time transfer links, including the satellite-ground two-way link, the satellite-ground lambda link, the ground
【机 构】
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China Academy of Space Technology(Xi'an), Xi'an 710100, China
论文部分内容阅读
In this paper, we systematically discussed and analyzed the uncertainties of four typical time transfer links, including the satellite-ground two-way link, the satellite-ground lambda link, the ground-ground TWSTFT link and the ground-ground double-lambda link. Combining with the estimations of the time delays that predicted by relativistic theory for one-way transfer and the derivations of the clock differences of four typical links, we found that all the maximum uncertainty terms of the four links are the order of if we do not -2cconsider the time delays between receiving and emitting signals on the satellite itself. Specifically, for the satellite-ground lambda link, the clock difference of orderis uncorrelated with the satellite velocities, so that the clock difference -2cuncertainties is superior to the satellite-ground two-way transfer link. Similarly, the ground-ground double-lambda link is better than the ground-ground TWSTFT transfer link. Meantime, the accuracy of the links arising from the relativistic time delays are also discussed.
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