2015年11月4日太阳射电爆发干扰导航信号事件中的X射线先兆分析  

X-ray Aura Analysis of the Solar Radio Burst Interfering with Navigation Signal Events on November 4,2015

作　　者：董亮[1] 闫小娟 黄文耿 李攀[4] 于超 高冠男[1] 阿尔察 沈发新 郭少杰[1] Dong Liang;Yan Xiaojuan;Huang Wengeng;Li Pan;Yu Chao;Gao Guannan;A Ercha;Shen Faxin;Guo Shaojie(Yunnan Observatories,Chinese Academy of Sciences,Kunming 650216,China;National Satellite Meteorological Centre/National Space Weather Monitoring and Early Warning Centre,Beijing 100081,China;National Space Science Center,Chinese Academy of Sciences,Beijing 100090,China;Beijing Institute of Tracking and Communication Technology,Beijing 100094,China;University of Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]中国科学院云南天文台,云南昆明650216 [2]国家卫星气象中心/国家空间天气监测预警中心,北京100081 [3]中国科学院国家空间科学中心,北京100090 [4]北京跟踪与通信技术研究所,北京100094 [5]中国科学院大学,北京100049

出　　处：《天文研究与技术》2021年第3期294-300,共7页Astronomical Research & Technology

基　　金：国家自然科学天文联合基金(U2031133);国家自然科学基金重点项目(U1831201);国家自然科学基金重点专项(11941003);云南省应用基础研究计划面上项目(2019FB009)资助.

摘　　要：太阳射电爆发是无线通讯特别是卫星导航通讯的潜在影响因素之一。2015年11月4日的太阳射电爆发事件在1415 MHz点频的流量达到了峰值5800 SFU(Solar Flux Unit,太阳射电流量单位,1 SFU=10^(-22) W/(m^(2)·Hz)),位于日下点的欧洲全球定位系统(Global Positioning System,GPS)和瑞典的航空导航系统均受到了影响。分析了此次事件产生源活动区的X射线流量变化与射电流量变化之间的时间关系;通过比对,X射线的流量抬升时间较射电阈值有30 min的提前量。随后讨论了提前量之间的物理背景,即软硬X射线分别对应热电子和非热电子辐射,而非热电子是产生能够造成此类空间天气事件射电爆发的物理条件,X射线由软转硬的过程中流量的抬升变化,为进一步防控这类空间天气事件提供了一种有效的手段。Solar radio burst event(SRB)is an optional factor for wireless communications especially satellites navigation communications.The peak flux of the SRB event in 4th November reached 5800 SFU(Solar Flux Unit)in 1415 MHz.During this event,the GPS receivers in European and the Air navigation systems all suffered from stronge influences.In this paper,we analysed the relationship between X-ray flux variation and radio flux variation during this event.By comparing,the beginning time of X-ray flux upraising was 30 minutes earlier than radio flux.Furthermore,in this paper we discussed the background of phenomenon,the soft and hot X-rays correspond to hot and non-hot electron radiation,which is the physical condition that produces radio bursts that can cause such space weather events.The soft-to-hard process of X-rays can offer an effective early alarming method for this kind of space weather events.

关 键 词：太阳射电爆发 导航信号 同频干扰 X射线 先兆分析 

分 类 号：P162[天文地球—天文学]