本项目以等离子体层Plume中EMIC波相应的波粒相互作用产生的电离层不均匀体结构及动力学特征为主要的研究内容。通过Cluster 卫星及IMAGE卫星观测的Plume 区的EMIC 事件，结合通过IMAGE卫星的FUV亚极光区质子极光与GPS TEC、数字测高仪的电离层观测，揭示产生的电离层不均匀体结构及演化特性。研究由等离子体层Plume 区EMIC 波所致沉降的环电流高能离子对电离层电子密度改变的特征。同时，由地面上地磁台链的观测反演获得由产生的电离层不均匀体对局部电离层电流的改变特征。研究结果有助于揭示等离子体层Plume 区EMIC 波动相关的波粒相互作用以及等离子体层-环电流-电离层系统的物质与能量耦合机制，同时对该区域的电离层电波传播研究具有重要的学术意义。

The project focus on the characteristics of structure and dynamics of ionospheric irregularities caused by the precipiating ring current ions in plasmaspheric plumes. In plasmaspheric plumes obseved by the Cluster and IMAGE .satellites,With conjoint observations of sub-auroral proton arc with IMAGE FUV, GPS TEC and ionosondes, the influence of the precipating ring current ions caused by EMIC waves in plasmaspheric plumes on ionospheric irregularities can be obtained.In addition, Variation of local ionospheric current caused by this kind of ionospheric irregularities are obtained with ground-based magnetometers. Those research are very important to reveal the mechanism of the particle and energy coupling in the system of the plasmasphere-RC-ionosphere and particle-EMIC waves interactions in plasmaspheric plumes. Meanwhile, the result is also great helpful to the research of the radio wave propagation in the ionosphere for the plasmaspheric plume.