Imaging of rough surfaces by RTM method
Künye
Sefer, A., Yapar, A. & Yelkenci, T. (2024). Imaging of rough surfaces by RTM method. IEEE Transactions on Geoscience and Remote Sensing, 62, 1-13. doi:10.1109/TGRS.2024.3374972Özet
An electromagnetic imaging framework is implemented utilizing a single frequency reverse time migration (RTM) technique to accurately reconstruct inaccessible two-dimensional (2D) rough surface profiles from the knowledge of scattered field data. The unknown surface profile, which is expressed as a 1D height function, is either perfectly electric conducting (PEC) or an interface between two penetrable media. For both cases, it is assumed that the surface is illuminated by a number of line sources located in the upper medium. The scattered fields, which should be collected by real measurements in practical applications, are obtained synthetically by solving the associated direct scattering problem through the surface integral equations. RTM is subsequently applied to generate a cross-correlation imaging functional which is evaluated numerically and provides a 2D image of the region of interest. A high correlation is observed by the functional in the regions where the transitions between two media occur. Hence, it results in the acquisition of the unknown surface profile at the sites where the functional attains its highest values. The efficiency of the proposed method is comprehensively tested by numerical examples covering various types of scattering scenarios.
Kaynak
IEEE Transactions on Geoscience and Remote SensingCilt
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Sefer, Ahmet; Yapar, Ali (Taylor and Francis Ltd., 2022-05-24)In this paper, an algorithm to reconstruct one-dimensional impenetrable rough surface from the knowledge of scattering field is presented. The rough surface is considered as locally perturbed and the scattering field data ... -
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Sefer, Ahmet (Institute of Electrical and Electronics Engineers Inc., 2022)This article addresses the least-squares method, which is vital in inverse scattering problems involving the reconstruction of inaccessible rough surface profiles from the measured scattered field data. The unknown surface ... -
Inverse scattering by perfectly electric conducting (PEC) rough surfaces: an equivalent model with line sources
Sefer, Ahmet; Yapar, Ali (Institute of Electrical and Electronics Engineers Inc., 2022)This paper presents a new method for the reconstruction of the perfectly electric conducting (PEC) rough surface profiles by utilizing electromagnetic waves. The inaccessible rough surface is illuminated by a tapered plane ...