中尺度电离层行进式扰动由于其空间分布的广泛和时间上的高发性，在电离层-大气层能量传输及交换中扮演十分关键的角色。触发中尺度电离层行进式扰动的因素包括大气声重力波以及电离层F区电场不稳定性。本项目通过中国地区的GPS密集布阵和测高仪链，结合光学和其他电波观测手段，对中国所属中低纬赤道异常区的中尺度电离层扰动的激发和传播特性进行系统性研究，包括三方面内容：（1）通过对中尺度电离层扰动与大气声重力波的联合观测，研究两者在有效观测高度上的统计上的相互关联；（2）通过GPS、测高仪链以及星基观测，分析源于低纬电场扰动的夜间电离层扰动的激发特征和传播规律，研究中尺度电离层扰动的衰减过程以及低纬不规则体等对电离层扰动传播及衰减的影响，探讨中尺度电离层扰动与扩展F的联系；（3）通过传输函数模拟和全波解数值模拟方法，结合实验观测，研究不同类型的源引起电离层扰动的动力学及电动力学过程及扰动的发展演变机制。

Medium-scale traveling ionospheric disturbances (MSTIDs) play an important role on the transportation of energy in the ionosphere and the energy exchange between the ionosphere and the atmosphere. This is due to the wide distribution of MSTIDs and their high occurrence. The sources of MSTIDs include atmospheric gravity waves (AGWs) and the instability of F-layer electric field. In this project, we plan to collect observations from GPS, ionosondes, and other optical and radio measurements to investigate the stimulation and propagation of MSTIDs at middle and low latitudes over China. The investigation includes the following contents. First, we plan to investigate the statistical correlation between MSTIDs and AGWs through combined observation of GPS and airglow; Then, we are going to study the dissipation process of MSTIDs and the influence of ionosphere irregularities on MSTIDs, and discuss the relation between MSTIDs and spread F. At last, through developing the transfer-function model and full-wave solutions of AGWs, we planned to study the stimulation process of MSTIDs and their propagation mechanism.