PMSE人工电子加热和过冲实验的初步研究

Preliminary experiment analysis about PMSE artificial electron heating and overshoot

极区中层夏季回波(PMSE)是发生在极区中层顶附近的一种异常强大的雷达回波,它具有明显的分层现象,加热有时能引起过冲现象.电波环境特性及模化技术国家重点实验室从2006年开始开展PMSE加热实验,通过三年的PMSE观测及加热实验,观察到PMSE回波强度具有明显的分层现象,并且层数之间变化迅速.另外本文也得到PMSE加热特征曲线OCC(Overshoot Characteristic Curves)图,回波功率随高度变化的剖面图、回波强度随时间的变化图,存在明显的过冲现象.本文开展的PMSE加热实验研究,为将来我国独立开展PMSE研究打下了一定的基础.

Polar Mesosphere Summer Echoes （PMSE） are very strong radar echoes from altitudes near the polar summer mesopause. PMSE have obvious layered structures, the overshoot can be caused by artificial electron heating experiments under PMSE conditions. Since 2006, National Key Laboratory of Electromagnetic Environment has carried out the heating campaign for three years. Based on the data from 2006 to 2008, the different layered structures are observed, the numbers of layer change very quickly. The echo power changing with height and time is also observed. In addition, the overshoot characteristic curve （OCC） is obtained in our heating campaign too. The heating campaign may serve as the foundation for studying PMSE in the future.