A relativistic time-delay model at the micrometer level for satellite laser ranging
A relativistic time-delay model at the micrometer level for satellite laser ranging
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DOI：
10.1007/s10509-015-2491-4
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发表时间：
2015-09
影响因子：
1.9
通讯作者：
W. Han;Ran Cheng;Jin-he Tao;Zheng-hong Tang
中科院分区：
文献类型：
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作者：
W. Han;Ran Cheng;Jin-he Tao;Zheng-hong Tang
目前的卫星激光测距精度为毫米级。目前国际地球自转和参考系服务组织给出的卫星激光测距时延方程与此精度是一致的。预计，卫星激光测距的精度将在未来提高到亚毫米级（Pearlman等人，2007年）。本文从理论和应用角度出发，利用时间传递函数方法建立了卫星激光测距的相对论时延模型，研究了相对论效应对激光测距站与卫星间光传输的影响。模型的精度达到微米级。为了达到这样的精度，与现有的模型相比，只需要考虑地球的四极矩。该微米级模型将在未来的引力理论检验、卫星高精度定轨和大地测量中发挥重要作用。
Present accuracy of satellite laser ranging is at the millimeter level. The current time-delay equation of satellite laser ranging given by International Earth Rotation and Reference Systems Service is in agreement with this accuracy. Prospectively, the accuracy of satellite laser ranging will be improved to sub-millimeter in the future (Pearlman et al. 2007). In this paper, for theoretical interest and applications in future satellite-laser-ranging data processing, we develop a relativistic time-delay model for satellite laser ranging by the time-transfer-function method, and investigate all possible relativistic effects on the light propagation between a station and a satellite. The accuracy of our model arrives at the micrometer () level. For achieving such accuracy, only the quadrupole moment of the Earth needs to be taken into account compared with the existing model. This micrometer-level model should be useful in tests of the gravitation theory, high accuracy orbital determination of satellites and geodesy in the future.