区域电离层建模的单频伪距定位验证

发布时间：2018-03-05 20:09

本文选题：斜路径电离层模型　切入点：单星多项式函数模型　出处：《测绘科学》2017年04期 　论文类型：期刊论文

【摘要】：针对电离层单层模型无法满足单频用户定位精度要求的问题,该文建立了区域电离层斜路径模型和单星多项式函数模型。基于河北省区域CORS站的实验结果表明:该文建立的区域电离层模型的拟合精度比CODE中心的格网电离层模型提高了近80%。并将其应用于北斗、GPS单频伪距单点定位,得出北斗的单点定位高程和平面定位精度分别优于3和2m,GPS的单点定位高程和平面定位精度分别优于1.5和1m;相对于CODE,GPS和北斗在平面及高程方向的定位精度均提高了50%左右。结果证明,采用斜路径电离层模型和多项式函数模型,可以较好地反映区域电离层的精细结构。
[Abstract]:Aiming at the problem that the ionospheric monolayer model can not meet the requirement of positioning accuracy for single frequency users, In this paper, the regional ionospheric oblique path model and the single-star polynomial function model are established. The experimental results based on the regional CORS station in Hebei Province show that the fitting accuracy of the regional ionospheric model established in this paper is better than that of the grid ionosphere in the center of CODE. The model has been improved by nearly 80% and applied to the single frequency pseudo-range single point positioning of Beidou GPS. The results show that the single point height and plane positioning accuracy of Beidou are better than those of 3 and 2mg GPS, respectively, and the accuracy of single point height and plane positioning are better than 1.5 and 1 m, respectively, compared with that of CODEG GPS and Beidou GPS, the positioning accuracy of plane and elevation direction is improved. About 50%. It turns out, The oblique ionospheric model and polynomial function model can well reflect the fine structure of the ionosphere in the region.
【作者单位】：武汉大学卫星导航定位技术研究中心;湖北省地图院;
【基金】：国家自然科学基金青年项目(41504028) 湖北省自然科学基金青年项目(2015CFB326)
【分类号】：P228.4

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