利用GPS观测值监测电离层的时空变化  

Monitoring Temporal and Spatial Variations of Ionospheric TEC Using GPS Measurements

作　　者：寇瑞雄 李仲勤 高志钰 KOU Ruixiong;LI Zhongqin;GAO Zhiyu(Faculty of Geomatics,Lanzhou Jiaotong University,Lanzhou 730070,China;;Gansu Provincial Engineering Laboratory for National Geographic State Monitoring, Lanzhou 730070,China)

机构地区：[1]兰州交通大学测绘与地理信息学院,甘肃兰州730070 [2]甘肃省地理国情监测工程实验室,甘肃兰州730070

出　　处：《全球定位系统》2018年第4期36-41,72,共7页Gnss World of China

基　　金：国家自然科学基金(批准号:41661091)

摘　　要：研究电离层时空变规律对卫星导航、航空航天和通讯等具有重要价值。文中利用IGS站提供的GPS双频观测数据,采用区域电离层模型估计GPS系统硬件延迟,从而计算绝对电离层总电子含量。在时间尺度上,选择COR1站的2012年、2015年和2017年的数据进行时间变化分析,结果表明,电离层总电子含量在时间上呈现出周日变化、月变化和季节性变化。在空间方面,选择了经度相差较小、纬度方向分布均匀的CRO1、BRMU、UNBJ和Q IKI四个IGS站进行分析,结果表明在纬度方向具有明显的单峰效应,随着纬度的增大电离层总电子含量呈现减小趋势。The study of the ionospheric temporal and spatial variations has important value for satellite navigation,aerospace and communications.In this paper,the GPS dual-frequency observation data provided by the IGS station are used to estimate the hardware delay of the GPS system by using the regional ionosphere model to calculate the total electron content of the absolute ionosphere.On the time scale,we select the data in 2012,2015 and 2017 of COR1 station for time change analysis.The total ionospheric electron content shows diurnal,monthly and seasonal variations in time.In terms of space,four IGS stations,CRO1,BRMU,UNBJ,and QIKI,with small differences in longitude and uniform distribution in the latitude direction,are selected for analysis.The results show that there is an obvious unimodal effect in latitude direction,and the total electron content of the ionosphere shows a decreasing trend with increasing latitude.

关 键 词：GPS 硬件延迟 电离层总电子含量 时空变化 

分 类 号：P228.42[天文地球—大地测量学与测量工程]