| 星地距离变化对星地双向时间比对的影响及改正 |
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| 引用本文： | 王威,魏立栋,范国清. 星地距离变化对星地双向时间比对的影响及改正[J]. 国防科技大学学报, 2010, 32(2): 23-26,45 |
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| 作者姓名： | 王威 魏立栋 范国清 |
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| 作者单位： | 国防科技大学,机电工程与自动化学院,湖南,长沙,410073;国防科技大学,机电工程与自动化学院,湖南,长沙,410073;国防科技大学,机电工程与自动化学院,湖南,长沙,410073 |
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| 基金项目： | 国家高技术研究发展计划(863计划) |
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| 摘 要： | 星地时间同步是卫星导航系统的关键技术,星地双向时间比对能有效提高星地时间同步的精度。在分析了星地距离变化对星地双向时间比对可引起百纳秒量级误差后,提出了前后历元观测数据差分改正方法,通过数学仿真验证该方法能达到纳秒量级精度。
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| 关 键 词： | 星地双向时间比对 星地钟差 卫星导航系统 |
| 收稿时间： | 2009-10-21 |
The Influence and Correction of Satellite-to-ground Range Variation on Two-way Time Comparison between Satellite and Ground Station Clocks |
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| WANG Wei,WEI Lidong and FAN Guoqing. The Influence and Correction of Satellite-to-ground Range Variation on Two-way Time Comparison between Satellite and Ground Station Clocks[J]. Journal of National University of Defense Technology, 2010, 32(2): 23-26,45 |
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| Authors: | WANG Wei WEI Lidong FAN Guoqing |
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| Affiliation: | College of Mechatronics Engineering and Automation, National Univ. of Defense Technology, Changsha 410073, China;College of Mechatronics Engineering and Automation, National Univ. of Defense Technology, Changsha 410073, China;College of Mechatronics Engineering and Automation, National Univ. of Defense Technology, Changsha 410073, China |
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| Abstract: | Satellite and ground station time synchronization is the key technology of navigation satellite system. Two-way time comparison method between satellite and ground station clocks can improve the accuracy of satellite and ground station time synchronization effectively. By analyzing the influence of satellite-to-ground station range variation on two-way time comparison, which is the source of hundred nanoseconds error, a method of observe data differential correction was presented. Numerical simulation performed later shows that this method can reach the level of nanosecond precision. |
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| Keywords: | two-way time comparison between satellite and ground station clocks bias between satellite and ground station clocks navigation satellite system |
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