基于Jason-1/2/3 VTEC的全球电离层地图精度评估及修正  

Precision Assessment and Correction of Global IonosphericMaps Based on Jason-1/2/3 VTEC

作　　者：孟迪 王开心 冯建迪 张志豪[1] MENG Di;WANG Kaixin;FENG Jiandi;ZHANG Zhihao(School of Civil Engineering and Geomatics,Shandong University of Technology,Zibo 255000,China;School of Geodesy and Geomatics,Wuhan University,Wuhan 430079,China)

机构地区：[1]山东理工大学建筑工程与空间信息学院,山东省淄博市255000 [2]武汉大学测绘学院,武汉市430079

出　　处：《大地测量与地球动力学》2025年第5期512-517,共6页Journal of Geodesy and Geodynamics

基　　金：地理信息工程国家重点实验室开放基金(202318)。

摘　　要：本文使用Jason-1/2/3系列卫星的VTEC数据,从时间、空间等角度分析全球电离层地图的精度情况,并利用太阳活动分量、日变化分量和季节变化分量建立相应的修正方程。结果表明:1) CODE GIMs与Jason系列卫星的残差(G-J)与F_(10.7)呈二次函数关系,在日变化上呈24 h的周期特征,在季节变化上呈半年变化周期特征,修正方程能够有效修正GIMs数据。2)G-J的平均值在太平洋的低纬度地区取得最大值,在澳大利亚南部取得最小值;赤道异常中的等离子输送导致G-J的中误差呈现双峰特征;G-J的相对误差在大西洋南部,尤其是非洲南部的海洋地区取得极大值。This paper employs VTEC data from the Jason-1/2/3 satellite series to analyze the accuracy of global ionospheric maps(GIMs)from temporal and spatial perspectives,and establishes corresponding correction equations using solar activity components,diurnal variation components,and seasonal variation components.The results indicate:1)The residuals(G-J)between CODE GIMs and Jason series satellite data exhibit a quadratic function relationship with F 10.7,showing a 24-hour periodic characteristic in diurnal variation and a semi-annual variation pattern in seasonal changes.The correction equations can effectively amend the GIMs data.2)The mean value of G-J reaches its maximum in the low-latitude regions of the Pacific and its minimum in southern Australia;the plasma transport within the equatorial anomaly leads to a bimodal feature in the median error of G-J;the relative error of G-J attains its maximum in the southern Atlantic Ocean,particularly in the marine areas off southern Africa.

关 键 词：总电子含量 全球电离层地图 测高卫星 Jason系列卫星 

分 类 号：P228[天文地球—大地测量学与测量工程]