Advanced Imaging for Down-Looking Contactless GPR Systems
Keywords:
Contactless configuration, GPR, inverse scattering, microwave imagingAbstract
This paper investigates the performance of an advanced imaging procedure for ground penetrating radar (GPR) operating in contactless configuration, i.e., when data are collected at variable distances from the air-soil interface. A data processing procedure is presented, based on an advanced implementation of a microwave tomographic approach. This improved version, recently proposed by the authors, is able of accounting for the near-field distribution generated by a directional transmitting antenna. The effectiveness of the procedure is shown by processing numerical data, which are obtained by suitably implementing a realistic system on a full-wave commercial simulator. Metallic canonical objects are considered to compare the reconstruction capabilities of the proposed algorithm with respect to more conventional procedures, as well as to assess the role of the antenna distance from the air-soil interface.
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References
R. Persico, Ground Penetrating Radar: Inverse Scattering and Data Processing. Wiley, 2014.
M. Pastorino, Microwave Imaging. Wiley, 2010.
G. Leone and F. Soldovieri, “Analysis of the distorted Born approximation for subsurface reconstruction: Truncation and uncertainties effects,” IEEE Trans. Geosci. Rem. Sens., vol. 41, no. 1, pp. 66-74, Jan. 2003.
T. B. Hansen and P. M. Johansen, “Inversion scheme for ground penetrating radar that takes into account the planar air-soil interface,” IEEE Trans. Geosci. Remote Sens., vol. 38, no. 1, pp. 496-506, Jan. 2000.
R. Persico, “On the role of measurement configuration in contactless GPR data processing by means of linear inverse scattering,” IEEE Trans. Antennas Propag., vol. 54, no. 7, pp. 2062-2071, July 2006.
M. Salucci, G. Olivieri, and A. Massa, “GPR prospecting through an inverse-scattering frequencyhopping multi-focusing approach,” IEEE Trans. Geosci. Remote Sens., vol. 53, no. 12, pp. 6573- 6592, Jan. 2015.
F. Soldovieri, R. Persico, and G. Leone, “Effect of source and receiver radiation characteristics in subsurface prospecting within the distorted Born approximation,” Radio Sci., vol. 40, pp. 1-13, June 2005.
R. Streich and J. van der Kruck, “Accurate imaging of multicomponent GPR data based on exact radiation patterns,” IEEE Trans. Geosci. Remote Sens., vol. 45, pp. 93-103, Jan. 2007.
C. Dourthe, C. Pichot, J. Y. Dauvignac, and J. Cariou, “Inversion algorithm and measurement system for microwave tomography of buried object,” Radio Sci., vol. 35, pp. 1097-1108, Apr. 2000.
V. Ciarletti, et al., “WISDOM GPR designed for shallow and higher solution sounding of the martian subsurface,” Proc. IEEE, vol. 99, pp. 825-836, May 2011.
G. Valerio, et al., “GPR detectability of rocks in a Martian-like shallow subsoil: A numerical approach,” Planet. Space Sci., vol. 62, pp. 31-44, 2012.
D. Comite, A. Galli, I. Catapano, and F. Soldovieri, “The role of the antenna radiation pattern in the performance of a microwave tomographic approach for GPR imaging,” IEEE J. Sel. Topics Appl. Earth Observ. Remote Sens., vol. 10, no. 10, pp. 4337-4347, Oct. 2017.
R. Pierri, A. Liseno, R. Solimene, and F. Soldovieri, “Beyond physical optics SVD shape reconstruction of metallic cylinders,” IEEE Trans. Antennas Propag., vol. 54, no. 2, pp. 655-665, Feb. 2006.
F. Soldovieri, et al., “GPR estimation of the geome-trical features of buried metallic targets in testing conditions,” Prog. Electromagn. Res. B, vol. 49, pp. 339-362, 2013.
