一种顾及时空变化的BDS PPP多路径误差建模方法OA北大核心CSTPCD
A BDS PPP Multipath Model Considering Spatio-Temporal Variation Characteristic
根据BDS GEO、IGSO、MEO三种星座卫星轨道运行特性,使用多路径误差半天球格网点模型(multi-point hemispherical grid model,MHGM)和恒星日滤波(sidereal filtering,SF)方法建立 BDS 混合星座的多路径误差改正模型.使用该模型 改正多路径误差后,BDS精密单点定位(precise point positioning,PPP)的载波相位验后残差显著减小,E、N、U方向定位精度分别提升41％、37％、38％,收敛速度整体提升 31％.
Based on the satellite orbit characteristics of BDS GEO,IGSO,and MEO,we use multi-point hemispherical grid model(MHGM)and sidereal filtering(SF)method to establish a multipath error correction model for a mixed constellation of BDS.After applying the model to correct multipath errors,the post-fit carrier phase residuals for BDS precise point positioning(PPP)are significantly re-duced,and the positioning accuracy in E,N,and U directions is improved by 41％,37％,and 38％,respectively,with an overall increase in convergence speed of 31％.
罗浩;范永昭;叶世榕;夏凤雨;李昭;沙智敏;江俊飞
武汉大学卫星导航定位技术研究中心,武汉市珞喻路129号,430079中国科学院上海天文台,上海市南丹路80号,200030广东电网有限责任公司电力科学研究院,广州市东风东路水均岗8号,510620
测绘与仪器
BDS多路径误差精密单点定位多路径误差半天球格网模型恒星日滤波
BDSmultipath errorprecise point positioningmulti-point hemispherical grid modelsidereal filtering
《大地测量与地球动力学》 2024 (008)
804-809 / 6
国家自然科学基金(41974031);中交公规院科技创新专项(C22030A);福建省高新技术与工业科技引导性资助项目(2022H0030). National Natural Science Foundation of China,No.41974031;Science and Technology Innovation Project of HPDI,No.C22030A;High Technology and Industrial Technology Guiding Project of Fujian Province,No.2022H0030.
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