Reflection Characteristics of Layered Media in Polar Mesopause Related to Polar Mesosphere Summer Echoe

被引:2
|
作者
Li Hailong [1 ]
Wu Jian [2 ]
Huang Jiying [3 ]
Wang Maoyan [1 ]
机构
[1] Univ Elect Sci & Technol China, Sch Phys Elect, Chengdu 610054, Peoples R China
[2] China Res Inst Radiowave Propagat, State Key Lab Electromagnet Environm, Beijing 102206, Peoples R China
[3] Xidian Univ, Sch Sci, Xian 710071, Peoples R China
基金
中国国家自然科学基金;
关键词
polar mesosphere summer echoes; layered media; dusty plasma; dust; EISCAT-224 MHZ RADAR; VHF RADAR; ASPECT SENSITIVITY; DUST PARTICLES; PMSE; FREQUENCY;
D O I
10.1088/1009-0630/12/4/07
中图分类号
O35 [流体力学]; O53 [等离子体物理学];
学科分类号
070204 ; 080103 ; 080704 ;
摘要
Polar mesosphere summer echoes (PMSE) are very strong radar echoes from altitudes close to the polar summer mesopause. The data from sounding rocket campaigns indicate that the radar signal to noise ratio (SNR), electron density and dust charge density of polar meso-sphere in summer show obvious layered structure. In this paper the theory of wave propagation in layered media is used to study the reflectance and SNR at each layer in polar mesosphere. The calculated SNR using theory of dusty plasma is found in good agreement with the experimental result, which may imply that the intensity of the radar echoes reflected by the layered structure in polar mesosphere where polar mesosphere summer echoes used to occur can interpret partially the phenomenon of PMSE. In other words, reflection may play an important role in the occurrence of PMSE.
引用
收藏
页码:416 / 420
页数:5
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