Characteristic analysis of layered PMSEs measured with different elevation angles at VHF based on an experimental case

IF 2.9 3区地球科学

Earth and Planetary Physics Pub Date : 2021-03-29 DOI:10.26464/epp2021001

ShuCan Ge, HaiLong Li, Bin Xu, Tong Xu, Lin Meng, MaoYan Wang, Abdel Hannachi, MengYan Zhu, Lina Broman, Safi Ullah, Abdur Rauf

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引用次数: 2

Abstract

Polar Mesosphere Summer Echoes (PMSEs) are very strong radar echoes observed at altitudes near the polar summer mesopause. One of the essential properties of these radar echoes is that they can give useful diagnostic information about the physics of the scattering process. In this paper, the related characteristics of PMSEs measured with the European Incoherent SCATter Very High Frequency (EISCAT VHF) 224 MHz radar on 13–15 July 2010 are studied at different elevation angles from 78° to 90°. It is found that the PMSEs peak power and strongest PMSEs average power occur at the same elevation angles. Also interesting is that the strongest PMSEs occur at off-vertical angles when a PMSEs has a layered (multilayer) structure. And reflection may have more significant effects on PMSEs when there are double or multilayer PMSEs. Possible explanations regarding these observations are discussed.

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基于实验的VHF不同仰角层状pmse测量特性分析

极地中间层夏季回波是在极地夏季中间层顶附近高度观测到的非常强的雷达回波。这些雷达回波的基本特性之一是它们可以提供有关散射过程的物理诊断信息。本文研究了2010年7月13-15日欧洲非相干散射甚高频(EISCAT VHF) 224 MHz雷达在78°~ 90°不同仰角下测得的pmse相关特性。结果表明，在相同的俯仰角下，pmse的峰值功率和最强平均功率出现在相同的俯仰角下。同样有趣的是，当pmse具有分层(多层)结构时，最强的pmse会出现在非垂直角度。当存在双层或多层pmse时，反射对pmse的影响更为显著。对这些观察结果的可能解释进行了讨论。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Earth and Planetary Physics GEOSCIENCES, MULTIDISCIPLINARY-

自引率

17.20%

发文量

174