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首页> 外文期刊>Subsurface Sensing Technologies and Applications >A Volume Scattering Model for Coupled Interpretation of Ground-Penetrating Radar (GPR) and Synthetic Aperture Radar (SAR)
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A Volume Scattering Model for Coupled Interpretation of Ground-Penetrating Radar (GPR) and Synthetic Aperture Radar (SAR)

机译：探地雷达（GPR）与合成孔径雷达（SAR）耦合解释的体散射模型

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摘要

We study the capabilities of low frequency radar systems to sound the subsurface in arid countries. This approach is based on the coupling between two complementary radar techniques: the airborne/spaceborne Synthetic Aperture Radar (SAR) used in L-band (1.2 GHz) for imaging large scale subsurface structures, and the Ground-Penetrating Radar (GPR) used at 900 MHz for sounding soils from the surface down to several meters. Recent results obtained on the well-known site in southern Egypt (Bir Safsaf) are recalled and constrain a numerical model for quantitatively interpreting the SAR/GPR data. This model is based on electric field extrapolation in the frequency domain, taking into account the aperture and the incidence angle of the antenna for both the SAR and GPR systems. Simulated signals from given realistic geological cross sections can then be analysed in order to understand the contribution of volume backscattering on both of radar systems. The model is tested on the Bir Safsaf site, and gives a good description of the dielectric behaviour, since observed and simulated backscattered signals are quite comparable. Discussion on the domain of validity for the model is presented as well as the perspectives that it could offer in the future missions of quantitative mapping of the subsurface in arid deserts.
机译：我们研究了低频雷达系统在干旱国家探测地下声音的能力。该方法基于两种互补雷达技术之间的耦合：L波段（1.2 GHz）中用于对大型地下结构成像的机载/星空合成孔径雷达（SAR），以及用于大尺度地下结构成像的探地雷达（GPR） 900 MHz，用于从地面向下探到几米的土壤。回顾了在埃及南部著名的站点（Bir Safsaf）获得的最新结果，并限制了用于定量解释SAR / GPR数据的数值模型。该模型基于频域中的电场外推，同时考虑了SAR和GPR系统的天线孔径和天线入射角。然后，可以分析来自给定的实际地质横截面的模拟信号，以了解体积反向散射对两个雷达系统的影响。该模型在Bir Safsaf现场进行了测试，并很好地描述了介电特性，因为观察到的和模拟的反向散射信号具有相当的可比性。讨论了该模型的有效性范围，以及该模型在未来干旱沙漠中地下定量测绘中的作用。

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