江汉平原上空Q_(TEC)变化特征的统计分析  

Statistical Analysis of Q_(TEC) Variation over Jianghan Plain

作　　者：罗伟华[1] 张倩[1] 徐继生[1] 

机构地区：[1]武汉大学电子信息学院,湖北武汉430072

出　　处：《武汉大学学报（理学版）》2007年第1期100-104,共5页Journal of Wuhan University:Natural Science Edition

基　　金：国家自然科学基金项目资助(40474055)

摘　　要：提出了一种观测台网用多接收机性能一致性的标定方法,并利用江汉平原GPS接收台网的观测数据,分析了该地区上空QTEC的日变化、季节变化、年变化和逐年变化的统计特征.标定结果表明,不同接收机之间的仪器偏差是从双频GPS卫星信标推算QTEC的主要误差来源之一,必须校正.统计分析证实,江汉平原上空QTEC的日变化特征同时受电离层和等离子层控制,其年变化以半年周期为主,峰值和谷值分别出现在两分点和两至点附近,QTEC值的逐年变化从太阳活动峰年到低年逐年下降,与以太阳黑子数为代表的太阳活动密切相关.The paper introduces the way and the results of the receiver calibration in the GPS Array. Then, persist observation data from GPS-array which is arranged in Wuhan, Jingzhou and Anlu around Jianghan Plain are used to investigate the characteristics of QTEC variation with day, season, year and year after year. The results show that the annual variation of QTEC appears to a period of half a year. The year after year variation of QTEC value is good correlative with the solar activity level represented by the variation of the number of sunspots.

关 键 词：全球定位系统 电离层 总电子含量 仪器偏差 标定 

分 类 号：P352.7[天文地球—空间物理学]