摘要
从利用GPS提取区域电离层总电子含量（total electron content,TEC）的基本原理出发,解决了伪距观测值优化以及硬件延迟（DCB）处理问题,并将提取的TEC信息与欧洲定轨中心（CODE）计算的全球电离层（GIM）模型内插值应用在单频精密单点定位中,进行电离层延迟改正实验。结果表明,利用本文提取的TEC值进行单频精密单点定位电（PPP）离层延迟改正时,点位精度能提高到0.2~0.4m左右,明显优于利用GIM内插值的改正精度。
We introduce a measurement for extracting the regional ionosphere TEC（total electron content）from GPS dual observations in detail. From the basic principles for extracting TEC using GPS, we focus on solving two key problems. One was to improve the accuracy of pseudo-range observations, and the other was to detach the DCB （differential code bias） of the satellites and receivers. Furthermore, the extracted TEC and TEC calculated by the CODE（Center for Orbit Determination in Europe） were used as an ionospheric delay correction in a single-frequency point positioning model. The results show that the point accuracy can reach to 0.2-0.4 m using the extracted TEC correction, a sig nificantly improvement over the use of an interpolated GIM correction.
出处
《武汉大学学报（信息科学版）》
EI
CSCD
北大核心
2014年第9期1022-1027,共6页
Geomatics and Information Science of Wuhan University
基金
国家自然科学基金资助项目(41274028
41074021)~~
