项目名称： 电离层南北半球不对称与低纬电离层闪烁的相关性研究

项目编号： No.41474134

项目类型： 面上项目

立项/批准年度： 2015

项目学科： 天文学、地球科学

项目作者： 罗伟华

作者单位： 中南民族大学

项目金额： 90万元

中文摘要： 电离层闪烁对各种通讯和导航定位系统及空间活动有重要影响，其气象学特征及生成机制一直是电离层物理和空间天气学研究的热点问题。本项目拟基于数据分析和数值模拟计算，开展电离层磁南-北半球不对称与低纬电离层闪烁发生率的相关性研究。研究内容包括：1)基于GPS台网和卫星观测数据，分析背景低纬电离层的磁南北半球不对称特征随地方时、季节、太阳活动和逐日变化特征；2)利用地基观测数据，统计分析低纬电离层闪烁出现率的变化特征，将其与电离层半球不对称特征进行比较分析，建立磁南-北半球不对称与闪烁出现率之间的联系；3)基于电离层理论模型，结合数据分析结果，计算分析电离层磁南北半球不对称的变化特征以及影响半球不对称和闪烁出现率的背景因素，初步建立低纬地区短期闪烁预报模型。本项目研究将促进理解影响电离层电动力学过程和闪烁活动的物理因素，有助于构建闪烁预报模型，更好的服务于空间天气预报，具有重要的科学意义和应用价值。

中文关键词： 电离层；电离层闪烁；低纬电离层；数值模拟

英文摘要： Ionospheric scintillation have significant effect on the communication/navigation system and space activity, the morphology and the mechanism of the scintillation is always the hot issue of the ionospheric physics and space weather. This project intends to study the correlationship between the magnetic south-north hemispheric asymmetry of the ionosphere and the occurrence of the low-latitude ionospheric scintillation on the basis of data analysis and numerical calculation. The main study would contain three sections as follows: 1) Based on analysis of GPS network and satellite observations, study the characteristics of the magnetic southern-northern hemispheric asymmetry of background low-latitude ionosphere depending on local time, seasons, solar cycles and day-to-days. 2) Using ground-based observations, study the statistical characteristics of the occurrences of scintillation in low-latitude ionosphere, and develop the relationship between the magnetic south-north hemispheric asymmetry of the ionosphere and the occurrence of the low-latitude ionospheric scintillation comparing the characteristics of scintillation with the characteristics of asymmetry of background ionosphere. 3) By view of ionospheric theoretic model, combining with data analysis, study the characteristics of the hemispheric asymmetry of the ionosphere and the factors leading to the hemispheric asymmetry and the occurrence of scintillation. Develop a short-term trend scintillation forecasting system of low-latitude ionosphere. The investigation of this project may promote to understand the physical factors affecting the electrodynamic process and scintillation activity in low-latitude ionosphere. It also can help to develop the scintillation forecasting system and better work for the space weather forecasting, which have important scientific meaning and applicable value.

英文关键词： ionosphere;ionospheric scintillation;low-latitude ionosphere;numerical simulation