大地测量与地球动力学2025，Vol.45Issue(9)：910-914,5.DOI:10.14075/j.jgg.2024.08.409
低轨卫星增强智能手机定位性能研究
Research on Enhancing the Positioning Performance of Smartphones with Low-Earth Orbit Satellites
摘要
Abstract
To address the issues of large pseudorange measurement noise,discontinuous observation data,weak geometric strength in smartphone GNSS observations,and high noise levels in the built-in micro inertial measurement unit(MIMU)of smartphones,a tightly coupled GNSS/MIMU navigation method enhanced by low-Earth orbit(LEO)satellites is proposed.Based on the characteristics of the Walker constellation and the Keplerian orbital parameters of LEO satellites,LEO pseudorange obser-vation data are simulated.The positioning performance of smartphone GNSS single-point positioning,GNSS/MIMU tight integration,and LEO-enhanced GNSS/MIMU tight integration are compared and analyzed.Real smartphone data are used for validation.The experimental results show that after in-corporating LEO satellites,the average number of visible satellites increases by about 7.The faster movement speed of LEO satellites further optimizes the GNSS geometric strength,reducing the aver-age PDOP value by 50％.Compared with GNSS single-point positioning,the GNSS/MIMU tight in-tegration improves positioning accuracy in the east,north,and up directions by 18％,23％,and 10％,respectively.The LEO-enhanced GNSS/MIMU tight integration improves positioning accuracy in the east,north,and up directions by 73％,81％,and 60％compared with GNSS single-point posi-tioning,and by 67％,75％,and 56％compared with GNSS/MIMU tight integration.关键词
智能手机/GNSS/MIMU/LEO/紧组合Key words
smartphone/GNSS/MIMU/LEO/tightly coupled分类
天文与地球科学引用本文复制引用
谢慧,吴有龙,李国利,陈帅..低轨卫星增强智能手机定位性能研究[J].大地测量与地球动力学,2025,45(9):910-914,5.基金项目
江苏省博士后基金(2021K463C) （2021K463C）
江苏省产学研合作项目(BY20230867). Postdoctoral Science Foundation of Jiangsu Province,No.2021K463C （BY20230867）
Industry-University-Research Cooperation Project of Jiangsu Province,No.BY20230867. （）
