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Determination of the Azimuthal Extent of Coherent E‐Region Scatter Using the ICEBEAR Linear Receiver Array
Radio Science ( IF 1.6 ) Pub Date : 2021-03-07 , DOI: 10.1029/2020rs007191
Devin Huyghebaert 1 , Kathryn McWilliams 1 , Glenn Hussey 1 , Draven Galeschuk 1 , Jorge L. Chau 2 , Juha Vierinen 3
Affiliation  

The Ionospheric Continuous‐wave E‐region Bistatic Experimental Auroral Radar (ICEBEAR) is a VHF coherent scatter radar that operates with a field‐of‐view centered on 58°N, 106°W and measures characteristics of ionospheric E‐region plasma density irregularities. The initial operations of ICEBEAR utilized a wavelength‐spaced linear receiving array to determine the angle of arrival of the ionospheric scatter at the receiver site. Initially only the shortest baselines were used to determine the angle of arrival of the scatter. This publication uses this linear antenna array configuration and expands on the initial angle of arrival determination by including all the cross‐spectra available from the antenna array to determine both the azimuthal angle of arrival and the azimuthal extent of the incoming ionospheric scatter. This is accomplished by fitting Gaussian distributions to the complex coherence of the signal between different antennas and deriving the azimuthal angle and extent based on the best fit. Fourteen hours of data during an active ionospheric period (March 10, 2018, 0–14 UT) were analyzed to investigate the Gaussian fitting procedure and determine its feasibility for implementation with ICEBEAR. A comparison between mapped scatter, both neglecting azimuthal extent and including azimuthal extent is presented. It demonstrates that the azimuthal extent of the ionospheric E‐region scatter is very important for accurately portraying and analyzing the ICEBEAR measurements.

中文翻译:

使用ICEBEAR线性接收器阵列确定相干电子区域散射的方位角范围

电离层连续波E区双基地实验性极光雷达(ICEBEAR)是VHF相干散射雷达,其工作场中心为58°N,106°W,并测量电离层E区等离子体密度不规则性的特征。ICEBEAR的初始操作利用波长间隔的线性接收阵列来确定电离层散射到达接收器位置的角度。最初,仅使用最短的基线来确定散射的到达角度。该出版物使用了这种线性天线阵列配置,并通过包括天线阵列中所有可用的交叉光谱来扩展初始到达角确定,以确定入射的方位角和入射电离层散射的方位角。这是通过使高斯分布适合不同天线之间信号的复杂相干并基于最佳拟合得出方位角和范围来实现的。在电离层活跃期(2018年3月10日,UT 0-14),分析了14个小时的数据,以研究高斯拟合程序并确定其在ICEBEAR中实施的可行性。给出了映射散射(忽略方位角范围和包括方位角范围)之间的比较。它表明,电离层E区散射的方位角范围对于准确描绘和分析ICEBEAR测量值非常重要。在电离层活跃期(2018年3月10日,UT 0-14),分析了14个小时的数据,以研究高斯拟合程序并确定其在ICEBEAR中实施的可行性。给出了映射散射(忽略方位角范围和包括方位角范围)之间的比较。它表明,电离层E区散射的方位角范围对于准确描绘和分析ICEBEAR测量值非常重要。在电离层活跃期(2018年3月10日,UT 0-14),分析了14个小时的数据,以研究高斯拟合程序并确定其在ICEBEAR中实施的可行性。给出了映射散射(忽略方位角范围和包括方位角范围)之间的比较。它表明,电离层E区散射的方位角范围对于准确描绘和分析ICEBEAR测量值非常重要。
更新日期:2021-03-25
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