全球以及区域电离层电子含量分布图的比较

发布时间：2018-01-26 19:45

本文关键词： 电离层 STEC TEC 单层模型球壳模型　出处：《地球物理学进展》2017年02期 　论文类型：期刊论文

【摘要】：电离层延迟是空间大地测量数据处理中一项重要误差源.电离层延迟可以根据电子含量分布图(IM)以及映射函数模型计算得到.本文以IGS、JPL和NOAA提供的电子含量分布图为例,比较了这些电子含量分布图在给定台站的不同观测高度角穿刺点上的天顶电子含量,并比较了采用单层和双层球壳映射函数模型获得的斜路径电子含量.分析结果显示两种映射函数模型在计算斜路径的影响差别不大.JPL的天顶电子含量影响总要比IGS的大约3TECU左右,呈现出明显的系统差.NOAA与IGS的系统差则相对不明显,个别台站的差值较大.表明不同GPS数据分析中心获得的电子含量分布图模型存在一定的系统差,在实际运用中应考虑这些差异.
[Abstract]:Ionospheric delay is an important error source in spatial geodetic data processing. The ionospheric delay can be calculated according to the electron content distribution map and the mapping function model. In this paper, IGS is used. The electron content distribution maps provided by JPL and NOAA are used as an example to compare the zenith electron content of these electron distribution maps at different angles of observation at a given station. The oblique path electron content obtained by single layer and double layer spherical shell mapping function model is compared. The results show that the effect of the two mapping function models on the calculation of oblique path is not different. The effect of JPL's zenith electron content on the calculation of oblique path is not obvious. It's always about 3TECU than IGS. The system difference between NOAA and IGS is not obvious. The difference of individual stations is large, which indicates that there is some systematic difference in the electronic content distribution models obtained by different GPS data analysis centers, which should be taken into account in practical application.
【作者单位】：解放军信息工程大学地理空间信息学院;中国科学院上海天文台;
【基金】：国家自然科学基金项目(U1431115)资助
【分类号】：P228;P352
【正文快照】： 1.解放军信息工程大学地理空间信息学院,郑州4500522.中国科学院上海天文台,上海2000301.College of Geospatial Information,The PLA Information Engineering University,Zhengzhou 450052,China2.Shanghai Astronomical Observatory,Chinese Academy of Sciences,Shanghai

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