基于区域电离层建模的单点定位应用分析  

REGIONAL IONOSPHERIC MODELING AND ITS APPLICATION IN SINGLE POINT POSITIONING ANALYSIS

作　　者：张瑞[1] 姚宜斌[1] 郑艳丽[2] 

机构地区：[1]武汉大学测绘学院,武汉430079 [2]武汉大学卫星导航定位技术研究中心,武汉430079

出　　处：《大地测量与地球动力学》2013年第1期69-73,共5页Journal of Geodesy and Geodynamics

基　　金：国家自然科学基金(41174012;41021061);中央高校基本科研业务费专项(201121402020008;2012618020202)

摘　　要：采用华东某省级区域CORS站数据,利用组合观测值提取测站电离层延迟,建立区域电离层模型;并将自估WHU电离层产品应用于流动站单双频定位。实验结果说明采用WHU产品的单频伪距单点定位(SPP)的定位结果明显优于CODE及双频SPP;同时,相对于CODE,WHU的单频PPP定位精度在三个方向的提高约为10%～30%,平面达到1～1.5 dm,高程2～2.5 dm;利用WHU产品进行双频PPP及中断重收敛实验,结果说明高精度电离层产品对提高初始定位精度、加速收敛以及中断后重收敛具有明显作用。We extracted ionospheric delay from the combination observations, built the regional ionospheric model and then tested the WHU products by processing single point positioning for rover stations data. The valida- tion of a provincial CORS （Continuously Operating Reference Stations） network confirms that the single-frequency SPP of WHU product results present significantly better than CODE product and dual-frequency SPP, at the same time, single-frequency PPP accuracy increases by about 10% x 30% in three directions compared with CODE prod- uct, can reach up to about 1-1.5dm in the north and east direction, and 2-2.5 dm in the up direction. Finally, we processed dual-frequency PPP with WHU ionospheric product, the experimental results show that the precision ion- ospheric products play a significant role to improve the initial positioning accuracy, and accelerate dual-frequency PPP convergence and interrupt re-convergence.

关 键 词：区域电离层模型 精密单点定位 伪距单点定位 双频 单频 

分 类 号：P227[天文地球—大地测量学与测量工程]