单频精密单点定位中电离层延迟改正方法  

An Ionospheric Correction Approach Based on Single Frequency PPP

作　　者：郑建雷[1] 黄张裕[1] 刘国超[1] 

机构地区：[1]河海大学地球科学与工程学院,江苏南京210098

出　　处：《测绘与空间地理信息》2015年第2期144-146,共3页Geomatics & Spatial Information Technology

摘　　要：在单频精密单点定位中,电离层延迟是降低定位精度的一个重要因素。本文利用基准站上的双频接收机测定每颗卫星运动轨迹通过电离层的部分,然后通过曲面拟合函数来对各个卫星轨迹通过的电离层建立模型,并对单频精密单点定位进行电离层延迟改正。实验分析表明,用该电离层延迟模型进行单频精密单点定位能够获得较好的精度要求,收敛速度得到了很大的提高。The error of ionospheric delay is the key sources to degrade the accuracy in single frequency PPP. In this paper, a dual - frequency receiver on the base station is employed to determine the part of the ionospheric delay along the trajectory of each satellite, and then the model is established by the surface fitting function. Verified by experiment, the model applied in single - frequency PPP can obtain better aeeuracy and improve greatly the eonvergence rate.

关 键 词：GPS 电离层延迟改正 单频PPP 

分 类 号：P228.1[天文地球—大地测量学与测量工程]