高低纬地区电离层扩展F暴时特性比较研究

Comparison on ionosphere spread-F between high and low latitude regions during the storm time

不同纬度地区电离层扩展F的对比分析是研究电离层扰动传播的一个重要方法。本文利用三个台站六个磁暴期间的扩展F数据,对高低纬地区电离层扩展F暴时特性进行了对比研究。结果表明,高低纬地区观测到的扩展F类型不完全相同,并且扩展F的起始时刻随着纬度降低而推迟,这表明产生扩展F的电离层扰动是从高纬向低纬地区传播的。

Contrastive study of Spread-F between different latitudes of ionosphere is an important method to investigate ionospheric disturbance propagation.In this paper,data from three DPS-4 digisondes located at low and high latitude regions were used to study the ionospheric Spread-F properties during the six storm times.The results show that,the observed types of Spread-F over high and low latitudes are not exactly the same.And the start time of Spread-F will be later if the latitude of the station is lower.It implies that propagation of the ionospheric irregularities which caused the Spread-F is from high latitude to low latitude ionosphere.