Open Access

ARTICLE

Inverse Scatterer Reconstruction in a Halfplane Using Surficial SH Line Sources

by C. Jeong¹, L.F. Kallivokas²

1 Department of Civil, Architectural and Environmental Engineering, The University of Texas at Austin, Austin, TX, USA.
2 Department of Civil, Architectural and Environmental Engineering, The University of Texas at Austin, Austin, TX, USA.

Computer Modeling in Engineering & Sciences 2008, 35(1), 49-72. https://doi.org/10.3970/cmes.2008.035.049

Abstract

We discuss the inverse scattering problem of identifying the shape and location of a rigid scatterer fully buried in a homogeneous halfplane, when illuminated by surficial (line) wave sources generating SH waves. To this end, we consider the full-waveform response of the coupled host-obstacle system in the frequency domain, and employ the apparatus of partial-differential-equation-constrained optimization, augmented with total differentiation for tracking shape evolutions across inversion iterations, and specialized continuation schemes in lieu of formal regularization. We report numerical results that provide evidence of algorithmic robustness for detecting a variety of shapes, including elliptically- and kite-shaped obstacles.

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