天地一体化信息网络2024，Vol.5Issue(1)：76-83,8.DOI:10.11959/j.issn.2096-8930.2024008
大规模低轨星座的实时精密定轨技术
Realtime Precise Orbit Determination Technology for LEO Mega-Constellation
摘要
Abstract
Supported by GNSS,it analyzed the advantages and disadvantages of solving LEO satellite orbit on the ground or onboard the satellites.The high-fidelity non-conservative force models were applied to the real-time orbit determination algorithm.To separate the kinematic and dynamic orbit determination process had been a great advantage for LEO satellites with much frequent orbital ma-neuvers.The test results showed that the accuracy of accelerations computed from the radiation pressure and atmospheric drag non-conservation force models were around 5 nm/s2.Use the broadcast ephemeris,the real-time orbit determination algorithm could get an accuracy of 0.8 m in the satellites′ positions and 1.1 mm/s accuracy in the satellites′ velocity.When the real-time precise ephemeris of GNSS satellites were provided,the algorithm could get an accuracy of 8 cm in the LEO satellites′ position and 0.1 mm/s in the veloc-ity.The method for real-time orbit determination and orbit prediction in this paper could be used to support the construction of naviga-tion system with the mega-constellations.关键词
大规模低轨星座/实时精密定轨/非保守力模型/大气阻力/辐射光压Key words
LEO mega-constellation/real-time precise orbit determination/non-conservative force models/atmospheric drag/solar ra-diation pressure分类
信息技术与安全科学引用本文复制引用
李桢,施闯..大规模低轨星座的实时精密定轨技术[J].天地一体化信息网络,2024,5(1):76-83,8.基金项目
国家重点研发计划资助项目(No.2023YFB3906503) （No.2023YFB3906503）
国家自然科学基金资助项目(No.42204033)National Key Research and Development Program of China(No.2023YFB3906503),The National Natural Science Foundation of China(No.42204033) （No.42204033）
