利用甚低频信号相位变化特性判断X射线耀斑类型的研究  

Determining the type of X-ray flare using the phase change characteristics of the VLF signal

作　　者：王喆 牛有田 周康泼 王照迪 郭松浩 赵修坤 李贝 郑智渊 WANG Zhe;NIU YouTian;ZHOU KangPo;WANG ZhaoDi;GUO SongHao;ZHAO XiuKun;LI Bei;ZHENG ZhiYuan(College of Electronic and Electrical Engineering,Henan Normal University,Xinxiang Henan 453007,China;Academician Workstation of Electromagnetic Wave Engineering of Henan Province,Xinxiang Henan 453007,China;Henan Key Laboratory of Optoelectronic Sensing Integrated Application,Xinxiang Henan 453007,China;Henan Engineering Laboratory of Additive Intelligent Manufacturing,Xinxiang Henan 453007,China;Henan Key Discipline Open Laboratory of Electromagnetic Wave Detecting(Henan Normal University),Xinxiang Henan 453007,China;School of Shipping and Naval Architecture,Chongqing Jiaotong University,Chongqing Sichuan 402247,China)

机构地区：[1]河南师范大学电子与电气工程学院,河南新乡453007 [2]河南省电磁波工程院士工作站,河南新乡453007 [3]河南省光电传感集成应用重点实验室,河南新乡453007 [4]增材智能制造河南省工程实验室,河南新乡453007 [5]河南省高校电磁波特征信息探测重点学科开放实验室,河南新乡453007 [6]重庆交通大学航运与船舶工程学院,四川重庆402247

出　　处：《地球物理学报》2022年第7期2402-2411,共10页Chinese Journal of Geophysics

基　　金：国家自然科学基金(U1704134);河南省重点科技攻关项目(162102210263,172102310238)联合资助。

摘　　要：甚低频(Very Low Frequency,VLF)信号在地面—电离层波导中传播,当太阳耀斑爆发时日地空间中X射线通量增大,使电离层电子密度分布受到影响,进而导致地面—电离层波导状态发生改变,造成接收到的VLF信号出现异常.本研究利用位于河南省新乡市的VLF信号接收站,对俄罗斯Alpha导航系统发射的VLF信号进行长期的监测和观察后,发现X射线耀斑爆发引起VLF信号相位产生缓变型和急始型两种类型响应.与美国气象卫星(GOES)观测的耀斑数据进行对比,发现VLF信号相位产生两种类型响应与耀斑到达峰值所用时长在耀斑持续时长中的占比有关,缓变型相位对应的耀斑到达峰值时长在耀斑持续时长中占比通常在30%~40%之间,急始型则不高于30%.研究X射线耀斑与VLF信号相位响应之间的对应关系,对进一步研究VLF信号传播及不同类型X射线耀斑的成因有积极的推动作用.Very Low Frequency(VLF)signals propagate in the earth-ionosphere waveguide.When the solar flare erupts,the X-ray flux in the solar-terrestrial space increases,which affects the distribution of electron density in the ionosphere,and then leads to the state of earth-ionosphere waveguide changes,resulting in abnormal VLF signals received.This study uses the VLF signal receiving station located in the city of Xinxiang,Henan Province,to monitor and observe the VLF signal transmitted by the Russian Alpha navigation system for a long time.It is found that the phase of the VLF signal caused by X-ray flare burst can lead to two types of responses which are the sudden commencement and the slowly varying.Compared with flare data observed by the Geostationary Operational Environmental Satellite(GOES)in the U.S.,it is found that the two types of responses generated by the VLF signals are related to the proportion of the time taken for the flare to reach the peak in the duration of the flare.The time for the flare to reach the peak corresponding to the slow varying type usually accounts for 30%~40%of the duration of the flare,and the sudden commencement type is not higher than 30%.Studying the corresponding relationship between X-ray flares and VLF signal phase response plays a positive role in further studying VLF signal propagation and the causes of different types of X-ray flares.

关 键 词：太阳耀斑 甚低频信号 Alpha站台信号 相位突然异常 急始型X射线耀斑 缓变型X射线耀斑 

分 类 号：P353[天文地球—空间物理学]