与地震相关的电离层三频信标CT诊断——实验及初步结果  

Research and application of computer ionospheric tomography algorithm using tri-band beacon data

作　　者：廖力[1] 赵庶凡[2] 

机构地区：[1]中国地震局地球物理研究所,北京100081 [2]中国地震局地震预测研究所,北京100036

出　　处：《国际地震动态》2016年第12期17-23,共7页Recent Developments in World Seismology

基　　金：国家国际科技合作对俄科技合作专项(2014DFR21280);ISSI-BeiJing项目;中国地震局地球物理研究所基本科研业务费(DQJB16B11)共同资助

摘　　要：已有研究表明地震发生前会出现电离层电子密度异常。三频信标探测通过对电离层进行快速扫描,反演得到电子密度的空间分布,能够更清晰地反映地震电离层异常特征,目前用于地震观测的三频信标观测刚刚开展。本研究介绍一种基于三频信标的电离层反演算法,采用120°E观测链的数据进行电离层层析成像,并与电离层垂测观测结果进行对比,研究观测链路上低纬和高纬电离层的时变特征。结果表明,本研究采用的电离层层析方法获得的F2层电子密度相对于初始输入的IRI模型更接近垂测观测,达到了一定的反演精度,可反映电离层的空间及时间变化特征。The past research has shown that there is ionospheric abnormal before earthquake.Tri-band beacon（TBB）could scan the ionosphere quickly,and the spatial distribution of electron density which reflects the features of seismic ionospheric anomaly more clearly could be got through the inversion.Currently,the TBB observation is applied to seismologic research.In this research,a computer ionospheric tomography（CIT）algorithm based on TBB has been introduced.Using the chain observation data on 120°E,CIT has been done,and results have been compared with the ionosonde data,meanwhile the ionospheric characteristics at low latitude and high latitude have been also studied.Results have shown that the CIT method used in this research could get the electron density in F2 layer with more accuracy than the initial input,and can reflect the spatial and time variation of the ionosphere correctly.

关 键 词：三频信标 电离层层析成像 地震 

分 类 号：P315.722[天文地球—地震学]