区域实时电离层延迟精化模型研究  

Study on regional real-time ionospheric delay refined model

作　　者：席广永[1,2] 邹东尧[1] 赵进超[1] 朱付保[1,2] 

机构地区：[1]郑州轻工业学院计算机与通信工程学院,郑州450001 [2]应急平台信息技术河南省工程实验室,郑州450001

出　　处：《测绘科学》2015年第2期35-38,共4页Science of Surveying and Mapping

基　　金：郑州轻工业学院博士科研基金项目;应急平台信息技术河南省工程实验室开放基金项目(YJ2013004)

摘　　要：研究电离层延迟的精化模型是一条高精度提取区域电离层延迟的可靠途径。常用的电离层延迟多项式函数模型,忽略了电离层延迟的局部特性,限制了建模精度,也不利于分析建模方法对模型求解精度的影响。针对多项式函数模型存在的不足,该文提出了电离层延迟的IDPB模型,将电离层延迟分为概略值和修正值两部分进行解算,解决拟合曲面的光滑度和逼近精确度之间存在着矛盾。结合JSCORS参考站的实测数据进行分析验证,IDPB模型可以提高电离层延迟解算的精度,同时可以缓解多项式函数模型解算的各时段电离层延迟的不连续性。The study of ionospheric delay refined model is a reliable approach to extract the regional ionospheric delay.The polynomial function model ignores the local characteristic of ionospheric delay,and is detrimental to the model accuracy and analysis of the impact of modeling to the accuracy.Aiming at the shortcomings of the polynomial function model,IDPB model was proposed in the paper.The ionospheric delay was divided into roughly part and correction part to solve the contradiction between the fitting surface smoothness and accuracy.Using the real data of JSCORS reference station,the IDPB model was performed,and the results showed that the IDPB model could improve the accuracy and mitigate the discontinuities between the adjacent time periods.

关 键 词：电离层延迟 多项式函数模型 B样条函数 IDPB模型 

分 类 号：P35[天文地球—空间物理学]