IGS分析中心电离层产品的一致性检验  

Consistency Verification of Ionospheric Products from IGS Analysis Centers

作　　者：肖丽 徐韶光 熊永良 吴霖易 XIAO Li;XU Shaoguang;XIONG Yongliang;WU Linyi(Faculty of Geosciences and Environmental Engineering,Southwest Jiaotong University,Chengdu 611756,China)

机构地区：[1]西南交通大学地球科学与环境工程学院,四川成都611756

出　　处：《测绘与空间地理信息》2025年第2期54-57,共4页Geomatics & Spatial Information Technology

基　　金：四川省科技计划项目(2021YFG0339、2022YFG0169)资助。

摘　　要：电离层产品已成为物理空间结构研究及时延修正的重要数据源,而不同机构的电离层产品精度具有一定的差异。本文以2021年1月1日至7日为评估时段,分析不同纬度、不同半球IGS分析中心电离层产品的一致性,同时对产品的内部连续性进行比较。结果表明:评估时段内,测试点处各机构电离层产品的RMSE值均在0—2 TECU,呈现出较高的一致性,其中,CODE与其余几个机构电离层产品的一致性最好;同一经度下南北半球VTEC值均呈现出明显差异,东西半球各机构VTEC值也呈现出非对称性,但各机构电离层产品在东西、南北半球的VTEC变化趋势基本一致。此外,相较于其他产品而言,CODE机构电离层产品内部连续性最好。High-accuracy ionospheric products are the important data sources for physics space structure research and time delay correction,but there are accuracy differences among products from different institutes.This article analyzes the consistency of ionospheric products in IGS analysis centers at different latitudes and hemispheres from January 1 st to 7 th,2021,and compares the internal continuity of the products.The results show that the RMSE values of ionospheric products at the selected sites range from 0 to 2 TECU which implies a high consistency.Among all the ionospheric products,CODE shows the best consistency with other institutions.At the same longitude,the VTEC values of the northern and southern hemispheres show obvious differences,and the VTEC values of the eastern and western hemispheres also showed asymmetry.However,the variation trend of the ionospheric products in the eastern and western hemispheres and the northern and southern hemispheres was generally the same,and the consistency was relatively high.In addition,compared with other products,CODE institution has the best internal continuity of ionospheric products.

关 键 词：VTEC TEC建模 全球电离层格网产品 一致性 连续性 

分 类 号：P231[天文地球—摄影测量与遥感]