随机粗糙表面下的合成孔径雷达成像

IF 1.6 4区 地球科学 Q3 ASTRONOMY & ASTROPHYSICS Radio Science Pub Date : 2023-12-01 DOI:10.1029/2023RS007712
Arnold D. Kim;Chrysoula Tsogka
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引用次数: 0

摘要

受无人机地面穿透雷达探测埋设地雷应用的启发,我们考虑了位于随机粗糙表面下方有损介质中的小点状散射体的成像问题。随机粗糙表面和有损介质中的吸收都会严重阻碍目标探测和成像过程。通过主成分分析,我们有效地消除了来自空气-土壤界面的反射。然后,我们使用对经典合成孔径雷达成像功能的修改来对目标成像。这种成像方法引入了一个用户定义的参数 δ,该参数通过 δ$sqrt\{delta }$ 来调整分辨率,从而实现亚波长精度的目标定位。二维的数值结果表明,这种方法对多个目标成像非常稳健。然而,由于有损介质的吸收,目标可探测的深度有限。
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Synthetic aperture radar imaging below a random rough surface
Motivated by applications in unmanned aerial based ground penetrating radar for detecting buried landmines, we consider the problem of imaging small point like scatterers situated in a lossy medium below a random rough surface. Both the random rough surface and the absorption in the lossy medium significantly impede the target detection and imaging process. Using principal component analysis we effectively remove the reflection from the air-soil interface. We then use a modification of the classical synthetic aperture radar imaging functional to image the targets. This imaging method introduces a user-defined parameter, δ, which scales the resolution by √δ allowing for target localization with sub wavelength accuracy. Numerical results in two dimensions illustrate the robustness of the approach for imaging multiple targets. However, the depth at which targets are detectable is limited due to the absorption in the lossy medium.
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来源期刊
Radio Science
Radio Science 工程技术-地球化学与地球物理
CiteScore
3.30
自引率
12.50%
发文量
112
审稿时长
1 months
期刊介绍: Radio Science (RDS) publishes original scientific contributions on radio-frequency electromagnetic-propagation and its applications. Contributions covering measurement, modelling, prediction and forecasting techniques pertinent to fields and waves - including antennas, signals and systems, the terrestrial and space environment and radio propagation problems in radio astronomy - are welcome. Contributions may address propagation through, interaction with, and remote sensing of structures, geophysical media, plasmas, and materials, as well as the application of radio frequency electromagnetic techniques to remote sensing of the Earth and other bodies in the solar system.
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