| 基于北斗星间链路的卫星自主导航可行性分析 |
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| 引用本文： | 李子强,辛洁,郭睿,李晓杰,唐成盼,田翌君.基于北斗星间链路的卫星自主导航可行性分析[J].武汉大学学报(信息科学版),2022,47(1):55-60. |
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| 作者姓名： | 李子强 辛洁 郭睿 李晓杰 唐成盼 田翌君 |
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| 作者单位： | 1.武汉大学测绘学院, 湖北 武汉, 430079 |
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| 基金项目： | 国家自然科学基金41874043国家自然科学基金41704037国家自然科学基金41804030国家自然科学基金41874039 |
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| 摘 要： | 北斗三号卫星导航系统(BeiDou-3 navigation satellite system,BDS-3)在BDS-2基础上,设计实现了高速宽带星间链路网络,以期实现导航和通信的一体化建设,并为卫星自主定轨(autonomous orbit determina-tion,AOD)技术的实现积累宝贵的实测数据.首先,利...
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| 关 键 词： | 北斗三号卫星导航系统 星间链路 自主定轨 |
| 收稿时间： | 2020-09-04 |
Feasibility Analysis of Autonomous Orbit Determination of BDS Satellites with Inter-Satellite Links |
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| Institution: | 1.School of Geodesy and Geomatics, Wuhan University, Wuhan 430079, China2.Troops 32021, Beijing 100094, China3.Shanghai Astronomical Observatory, Chinese Academy of Sciences, Shanghai 200030, China |
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| Abstract: | Objectives The BeiDou-3 navigation satellite system (BDS-3) has designed and implemented a high-speed broadband inter-satellite link (ISL) network on the basis of the BDS-2 to carry out integrated navigation and communication and accumulate valuable measured data for the autonomous orbit determination (AOD) of the satellites. With ISL data, navigation satellite systems can achieve AOD that enables satellites to update their ephemeris on-orbit without the support of the operational control segment. However, the key technologies of the AOD system of global positioning system have not been disclosed. In the last few years, some domestic scholars have carried out some useful research and exploration into AOD with simulation data. But the results of applying the ISL to AOD are still relatively few. Methods The AOD processing model was briefly reviewed on the basis of inter-satellite ranging observations, and a distributed AOD model was built with ISL data. Then, the link building efficiency, constellation geometry, and inter-satellite measurement noise of the 18 medium Earth orbit (MEO) satellites in the BDS-3 constellation were analyzed, and the influences of the initial orbit accuracy and filtering processing interval on the AOD process were also analyzed. Finally, the AOD results obtained via the measured inter-satellite ranging data on the 18 MEO satellites were given and compared with the results of the precision orbit for evaluation and analysis. Results AOD processing and performance analysis are conducted. The analysis results are as follows: (1) The BDS-3 ISLs are rather stable, with about 9 inter-satellite two-way ranging links for each satellite, and the effective ISLs and the constellation geometry could support the AOD of the distributed navigation constellation. (2) The initial orbit accuracy and the filtering interval affect the state evaluation accuracy and convergence velocity. (3) When the initial orbit accuracy is 0.1 m and the filtering interval is 60 s, the user ranging error accuracy of AOD for 30 days is 0.48 m. Conclusions The results confirm the validity of the proposed distributed AOD algorithm. |
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