Dielectric Constant Estimation through Alpha Angle with a Polarimetric GPR System

Zou, Lilong ORCID: https://orcid.org/0000-0002-5109-4866, Lantini, Livia ORCID: https://orcid.org/0000-0002-0416-1077, Tosti, Fabio ORCID: https://orcid.org/0000-0003-0291-9937 and Alani, Amir (2022) Dielectric Constant Estimation through Alpha Angle with a Polarimetric GPR System. In: 2021 11th International Workshop on Advanced Ground Penetrating Radar (IWAGPR), 01-04 December 2021, Valletta, Malta.

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Ground penetrating radar (GPR) is one of the most commonly used technologies for non-destructive testing (NDT). With the development of GPR signal processing methodologies, researchers are becoming more concerned not just with the detection of the target itself, but also with their physical properties and main features. In general, full waveform inversion algorithm is required to achieve this aim. But, full waveform inversion problem is a costive approach which need a huge computation. Thus, the ultimate goal of this study is to explore an effective strategy for estimating the relative permittivity of the target using polarimetric GPR data. We have investigated the relation between relative permittivity and polarimetric alpha angle based on the data collected by dual-polarization antennas GPR system. Laboratory experiments that measures different moisture sand targets (simulating for different relative permittivity target) in tree trunk holes have been carried out, taken as analog models for the physiological process representing decays in trees. After signal processing, the rough results that alpha angle versus with relative permittivity were obtained. The results show that for a dry sand the polarimetric alpha angle is small and the polarimetric alpha angle increases with increasing water content.

Item Type: Conference or Workshop Item (Speech)
Identifier: doi10.5194/egusphere-egu22-1544
Identifier: doi10.5194/egusphere-egu22-1544
Subjects: Construction and engineering > Civil and environmental engineering
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Depositing User: Lilong Zou
Date Deposited: 15 Sep 2022 18:40
Last Modified: 15 Sep 2022 18:40
URI: https://repository.uwl.ac.uk/id/eprint/9383

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