Relativistic Time Transfer for Inter-satellite Links

被引：2
|
作者：
Xie, W. [1 ,2 ,3 ]
机构：
[1] Nanjing Univ, Sch Astron & Space Sci, Dept Astron, Nanjing, Jiangsu, Peoples R China
[2] Shanghai Key Lab Space Nav & Posit Tech, Shanghai, Peoples R China
[3] Nanjing Univ, Minist Educ, Key Lab Modern Astron & Astrophys, Nanjing, Jiangsu, Peoples R China
来源：
FRONTIERS IN ASTRONOMY AND SPACE SCIENCES | 2016年 / 3卷
基金：
中国国家自然科学基金;
关键词：
general relativity; time transfer; inter-satellite link; time comparison; global navigation satellite system;
D O I：
10.3389/fspas.2016.00015
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
Inter-Satellite links (ISLs) will be an important technique for a global navigation satellite system (GNSS) in the future. Based on the principles of general relativity, the time transfer in an ISL is modeled and the algorithm for onboard computation is described. It is found, in general, satellites with circular orbits and identical semi-major axes can benefit inter-satellite time transfer by canceling out terms associated with the transformations between the proper times and the Geocentric Coordinate Time. For a GPS-like GNSS, the Shapiro delay is as large as 0.1 ns when the ISL passes at the limb of the Earth. However, in more realistic cases, this value will decrease to about 50 ps.
引用
收藏
页数：6
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