极区中层夏季回波火箭探空观测的个例分析  

One Analysis on the Rocket Detection of Polar Mesosphere Summer Echoes

作　　者：李海龙[1,2] 吴健[3] 黄际英[2] 王茂琰[1] 

机构地区：[1]电子科技大学物理电子学院,成都610054 [2]西安电子科技大学理学院 [3]中国电波传播研究所电波环境特性及模化技术国家重点实验室

出　　处：《空间科学学报》2009年第4期397-401,共5页Chinese Journal of Space Science

基　　金：国家自然科学基金项目(40831062);电波环境特性及模化技术国家重点实验室基金(9140C08060307ZCZJ16)共同资助

摘　　要：利用仅发生极区中层夏季回波(Polar Mesosphere Summer Echoes,PMSE)现象时的ECT-02火箭探空数据,反演出电子数密度和尘埃电荷数密度。这些典型的极区中层顶的基本参量为研究PMSE提供了良好的数据基础。通过分析得出了极区中层顶区域属于弱电离、弱耦合尘埃等离子体的结论。根据电子数密度扰动分析PMSE现象发现,电子数密度的扰动与PMSE有密切的联系,扰动强烈的地方回波就强,扰动弱的地方回波就弱,或者不发生PMSE现象。Polar Mesosphere Summer Echoes （PMSE） are very strong radar echoes from altitudes near the polar summer mesopause. ECT-02 is carried out when PMSE in polar mesopause was occured. Based on the experiment results of ECT-02, the electron number densities and dust charge number densities are deduced in the paper. The data will provide a good basis to study various features of PMSE. By analyzing the data, one can find that dusty plasma in polar summer mesopause is weakly ionized and weakly coupled. The variable disturbance of electron density is used to explain the generation mechanism of PMSE. The stronger disturbance of the electron density corresponds to the stronger radar echoes, and when the disturbance becomes small, the radar echoes become weak. even disappear.

关 键 词：极区中层夏季回波 尘埃等离子体 中层大气 

分 类 号：P352.3[天文地球—空间物理学]