太阳活动对区域电离层的影响分析

发布时间：2018-06-15 03:02

本文选题：电离层 + 区域电离层模型　；参考：《长安大学》2013年硕士论文

【摘要】：电离层与人类活动紧密相关，研究电离层异常对电子通信、卫星定位等领域有着重要意义。太阳耀斑、日食会引起电离层明显的异常变化。本文从实例出发，利用GPS技术，研究探讨了这两种现象引起的我国区域上空电离层异常情况。本文详细介绍了利用GPS双频观测值监测电离层异常的原理和方法，采用全球GPS服务提供的GPS双频观测资料，分别对太阳耀斑和日全食引起的我国上空电离层异常进行了分析探讨。重点介绍了GPS数据处理的各个环节和最小二乘曲面函数建立区域电离层模型的方法。结合全球电离层格网模型，对我国长江流域上空电离层TEC周日变化特征进行了分析总结。通过对两次引起我国上空电离层TEC异常的太阳耀斑事件的分析，，验证了耀斑爆发前电离层响应的“前兆”现象。利用建立的上海站的区域模型，对2009年7月22日日全食过程中，区域上空VTEC对日食食相在时间刻度上的响应情况进行了具体分析，并且结合不同食分地区VTEC变化对比值，总结了VTEC变化量与地区食分的关系。本文对耀斑和日食引起的我国不同纬度的电离层TEC变化量也进行了对比分析。根据全球电离层格网模型，绘制了7月22日日食当天我国上空电离层TEC变化的等值线图。提出了ε、P两个探测电离层异常变化的概念值。
[Abstract]:The ionosphere is closely related to human activities, so it is very important to study ionospheric anomalies in the fields of electronic communication and satellite positioning. Solar flares and eclipses can cause obvious abnormal changes in the ionosphere. In this paper, the ionospheric anomalies over China caused by these two phenomena are studied by using GPS technology. In this paper, the principle and method of monitoring ionospheric anomalies using GPS dual-frequency observations are introduced in detail, and GPS dual-frequency observation data provided by global GPS services are used. The ionospheric anomalies over China caused by solar flares and total solar eclipses are analyzed and discussed respectively. The method of establishing the regional ionospheric model with the least square surface function and every link of GPS data processing are introduced in detail. Based on the global ionospheric grid model, the diurnal variation characteristics of ionospheric TEC over the Yangtze River basin in China are analyzed and summarized. Through the analysis of two solar flare events that caused TEC anomaly over the ionosphere over China, the "precursor" phenomenon of ionospheric response before the flare burst was verified. Using the established regional model of Shanghai Station, the response of VTEC over the region to the time scale of the eclipse phase during the total solar eclipse on July 22, 2009, is analyzed in detail, and the VTEC changes in different regions are compared. The relationship between VTEC variation and regional food content was summarized. The variations of ionospheric TEC in different latitudes caused by flares and eclipses in China are also analyzed. Based on the global ionospheric grid model, an isoline map of the ionospheric TEC changes over China on the day of the solar eclipse on July 22 was plotted. Two conceptual values of 蔚 P for detecting ionospheric anomalies are presented.
【学位授予单位】：长安大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：P352;P182.9

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