全球定位系统2024，Vol.49Issue(5)：73-80,8.DOI:10.12265/j.gnss.2024148
低轨卫星下行仿真数据精密定轨研究
Precision orbit determination research of LEO satellite simulated downlink data
摘要
Abstract
This study focuses on precision orbit determination utilizing simulated downlink data from low earth orbit(LEO)satellites.A comprehensive investigation is conducted on the orbit determination performance,considering a simulated Walker 90/10/1 LEO satellite constellation with an orbit altitude of 1 000 km and an inclination angle of 48°,along with 150 ground stations equipped with corresponding orbit clocks and observation data.The observational data from global station networks,featuring station numbers ranging from 60 to 150,are utilized for precise orbit determination of LEO satellites,followed by a detailed analysis of orbit accuracy and station position dilution of precision(SPDOP)values.Results indicate a significant enhancement in LEO satellite orbit accuracy from 117.5 mm to 39.8 mm upon increasing the number of stations from 60 to 150.Furthermore,sparse station distribution leads to a rapid degradation in LEO satellite orbit accuracy.The study underscores the effectiveness of augmenting the number of ground stations in improving both visible station SPDOP and LEO satellite orbit accuracy over terrestrial regions.However,due to the constrained tracking range of stations,enhancing the orbit accuracy of LEO satellites in marine regions remains challenging.关键词
低轨卫星/卫星精密定轨/低轨星座仿真/测站卫星位置精度衰减因子(SPDOP)/低轨卫星下行数据Key words
LEO satellite/satellite precision orbit determination/LEO satellite constellation simulation/SPDOP/LEO satellite downlink data分类
天文与地球科学引用本文复制引用
王麒宁,王乐,赖文,折浩男..低轨卫星下行仿真数据精密定轨研究[J].全球定位系统,2024,49(5):73-80,8.基金项目
陕西省重点研发计划(2022ZDLSF07-12) （2022ZDLSF07-12）
陕西省重点研发计划(2021LLRH-06) （2021LLRH-06）
陕西省重点研发计划(2020ZDLGY02-05) （2020ZDLGY02-05）
陕西省创新能力支撑计划(2021TD-03) （2021TD-03）
