极区电离层TEC经验模型的建立及适用性分析  

MODELING AND APPLICABILITY ANALYSIS OF EMPIRICAL POLAR IONOSPHERIC TEC MODELS

作　　者：宁新国[1,2] 安家春[1] 王泽民[1] 

机构地区：[1]武汉大学中国南极测绘研究中心,湖北武汉430079 [2]长春市测绘院,吉林长春130021

出　　处：《极地研究》2014年第4期405-409,共5页Chinese Journal of Polar Research

基　　金：国家自然科学基金(41174029;41204028;41231064);南北极环境综合考察与评估专项资助项目;国家海洋局极地科学重点实验室开放基金(KP201201)

摘　　要：利用南极地区40多个GPS跟踪站2010年全年的实测数据,实现了极区电离层TEC建模,对多项式模型、广义三角级数函数模型、低阶球谐函数模型、改进的球谐函数模型以及球冠谐函数模型等五种电离层经验模型进行了比较,并评估了其在极区的适用性情况。结果表明,各个模型在极区都可以取得比较好的拟合精度,残差均值在0.1TECU以内,均方根误差在2 TECU以内。Total electron content（ TEC） were derived from GPS measurements collected from more than 40 continuously operating stations in Antarctica during 2010,and then were modeled using five commonly used regional models： the poly model（ POLY）,the generalized trigonometric series function model（ GTSF）,the low-degree spherical harmonic function model（ LSH）,the adjusted spherical harmonic function model（ ASHF） and spherical cap harmonic analysis（ SCHA）. The five models were compared with assessing their applicability in polar regions. The results showed that all five models performed well in Antarctica,with 0. 1 TECU of residual mean value and 2 TECU of root mean square error.

关 键 词：TEC 电离层模型 拟合精度 南极 

分 类 号：P352[天文地球—空间物理学]