我国中纬电离层TEC变化特征与IRI-2016预测性能分析  

Analysis of Ionosphere TEC Variation Characteristics and Predictive Performance of IRI-2016 in China’s Mid-latitude

作　　者：肖艳鲁 张东水 韩用顺[1,2] 韦建超 王鹏[2] XIAO Yanlu;ZHANG Dongshui;HAN Yongshun;WEI Jianchao;WANG Peng(National-Local Joint Engineering Laboratory of Geo-spatial Information Technology,Hunan University of Science and Technology,Xiangtan 411201,China;Earth Science and Space Information Engineering College,Hunan University of Science and Technology,Xiangtan 411201,China)

机构地区：[1]湖南科技大学地理空间信息技术国家地方联合工程实验室,湖南湘潭411201 [2]湖南科技大学地球科学与空间信息工程学院,湖南湘潭411201

出　　处：《地理空间信息》2022年第11期38-43,69,共7页Geospatial Information

基　　金：湖南省自然科学基金资助项目(2020JJ4295);交通运输部科技计划资助项目(2015-316-T19-060);湖南省普通高等学校教学改革研究资助项目(HNJG-2020-0481);湖南省大学生创新创业训练计划资助项目(S202010534002X)。

摘　　要：利用IGS组织提供的2008年、2012年Lhaz测站(29°N,91°E)和Urum测站(44°N,88°E)的GPS-TEC观测数据与IRI-2016模型TEC预测数据,分析了我国中纬度地区电离层TEC的变化特征,同时探讨了IRI-2016模型在不同太阳活动年份的预测性能,以期为IRI模型的改进以及建立我国中纬地区TEC预报模式提供重要参考。结果表明:(1)IRI-2016模型预测TEC能表现周日、季节和半年的变化特征,还能表现“中纬夏季夜间异常”和春秋季波峰不对称现象;(2)IRI-2016模型预测IRI-TEC与GPS-TEC观测数据的相关性结果在太阳活动低年(2008年)高于太阳活动高年(2012年);(3)在太阳活动低年IRI2016模型对TEC存在高估,而在太阳活动高年则存在低估。We used the GPS-TEC observation data of Lhaz station(29°N, 91°E) and Urum station(44°N, 88°E) in 2008 and 2012 provided by IGS organization and the TEC prediction data of IRI-2016 model to analyze the variation characteristics of ionosphere TEC in China’s mid-latitude, and discussed the prediction performance of IRI-2016 model in different solar activity years. The results show that(1)IRI-TEC can show changes in whole days, seasons, and half a year, as well as“mid-latitude summer night anomaly”and asymmetry of spring and autumn peaks.(2)The correlation between IRI-TEC and GPS-TEC in the solar minimum is greater than that in the solar maximum.(3)TEC is generally overestimated by IRI-2016 in the solar minimum and while it is underestimated in the solar maximum. This study can provide an important reference for the improvement of IRI model and the establishment of TEC forecast model in China’s mid-latitude.

关 键 词：IRI-2016模型 电离层 TEC GPS-TEC 

分 类 号：P228.4[天文地球—大地测量学与测量工程]