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Integrity monitoring for precise orbit determination of LEO satellites

文献类型：期刊论文

作者Wang, Kan2,3,4; El-Mowafy, Ahmed4; Rizos, Chris1
刊名GPS SOLUTIONS
出版日期2022
卷号26期号:1页码:13
关键词LEO POD Integrity monitoring GPS Protection level
ISSN号1080-5370
DOI10.1007/s10291-021-01200-4
英文摘要Due to an increasing requirement for high accuracy orbital information for low Earth orbit (LEO) satellites, precise orbit determination (POD) of LEO satellites is a topic of growing interest. To assure the safety and reliability of the applications requiring high accuracy LEO orbits in near-real-time, integrity monitoring (IM) is an essential operation of the POD process. In this contribution, the IM strategy for LEO POD in both the kinematic and reduced-dynamic modes is investigated. The overbounding parameters of the signal-in-space range error are investigated for the GPS products provided by the International GNSS Service's Real-Time Service and the Multi-GNSS Advanced Demonstration of Orbit and Clock Analysis service. Benefiting from the dynamic models used and the improved model strength, the test results based on the data of the LEO satellite GRACE FO-1 show that the average-case mean protection levels (PLs) can be reduced from about 3-4 m in the kinematic mode to about 1 m in the reduced-dynamic mode in the radial, along-track and cross-track directions. The overbounding mean values of the SISRE play the dominant role in the final PLs. In the reduced-dynamic mode and average-case projection, the IM availabilities reach above 99% in the radial, along-track and cross-track directions with the alert limit (AL) set to 2 m. The values are still above 98% with the AL set to 4 m, when the duty cycle of tracking is reduced to 40%, e.g., in the case of power limits for miniature satellites such as CubeSats.
WOS关键词SERVICE ; CLOCK ; GNSS
资助项目Australian Research Council[DP 190102444] ; Chinese Academy of Sciences, "Light of West China" Program[XAB2018YDYL01]
WOS研究方向Remote Sensing
语种英语
WOS记录号WOS:000734039300001
出版者SPRINGER HEIDELBERG
资助机构Australian Research Council ; Australian Research Council ; Chinese Academy of Sciences, "Light of West China" Program ; Chinese Academy of Sciences, "Light of West China" Program ; Australian Research Council ; Australian Research Council ; Chinese Academy of Sciences, "Light of West China" Program ; Chinese Academy of Sciences, "Light of West China" Program ; Australian Research Council ; Australian Research Council ; Chinese Academy of Sciences, "Light of West China" Program ; Chinese Academy of Sciences, "Light of West China" Program ; Australian Research Council ; Australian Research Council ; Chinese Academy of Sciences, "Light of West China" Program ; Chinese Academy of Sciences, "Light of West China" Program
源URL[http://210.72.145.45/handle/361003/14006]  
专题国家授时中心_高精度时间传递与精密测定轨研究室
通讯作者El-Mowafy, Ahmed
作者单位1.UNSW, Sch Civil & Environm Engn, Sydney, NSW, Australia
2.Univ Chinese Acad Sci, Beijing, Peoples R China
3.Chinese Acad Sci, Natl Time Serv Ctr, Xian, Peoples R China
4.Curtin Univ, Sch Earth & Planetary Sci, Perth, WA, Australia
推荐引用方式
GB/T 7714		 Wang, Kan,El-Mowafy, Ahmed,Rizos, Chris. Integrity monitoring for precise orbit determination of LEO satellites[J]. GPS SOLUTIONS,2022,26(1):13.
APA Wang, Kan,El-Mowafy, Ahmed,&Rizos, Chris.(2022).Integrity monitoring for precise orbit determination of LEO satellites.GPS SOLUTIONS,26(1),13.
MLA Wang, Kan,et al."Integrity monitoring for precise orbit determination of LEO satellites".GPS SOLUTIONS 26.1(2022):13.

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来源：国家授时中心

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