In the present paper, a hybrid electromagnetic imaging method for subsurface prospection is presented. The approach is based on the cascade of two blocks: a time-domain qualitative reconstruction algorithm followed by a multifrequency quantitative inverse-scattering technique. In the first phase, the scattered-field data estimated by adaptive filtering are exploited by a beamforming method to produce an initial image of buried targets. In the second phase, a multifrequency inexact-Newton inversion approach developed in Lebesgue spaces with variable exponents uses the first-step image in two different qualitative-quantitative combination strategies: as a priori information for setting the exponent function and to weight the solution updates inside the iterative inversion procedure. The approach has been validated using numerically simulated scattered-field data. An analysis on the effects of the application of the two qualitative-quantitative combination strategies is presented.

A hybrid qualitative-quantitative electromagnetic imaging method for subsurface prospecting

Schenone, Valentina;Fedeli, Alessandro;Pastorino, Matteo;Randazzo, Andrea;Estatico, Claudio
2022-01-01

Abstract

In the present paper, a hybrid electromagnetic imaging method for subsurface prospection is presented. The approach is based on the cascade of two blocks: a time-domain qualitative reconstruction algorithm followed by a multifrequency quantitative inverse-scattering technique. In the first phase, the scattered-field data estimated by adaptive filtering are exploited by a beamforming method to produce an initial image of buried targets. In the second phase, a multifrequency inexact-Newton inversion approach developed in Lebesgue spaces with variable exponents uses the first-step image in two different qualitative-quantitative combination strategies: as a priori information for setting the exponent function and to weight the solution updates inside the iterative inversion procedure. The approach has been validated using numerically simulated scattered-field data. An analysis on the effects of the application of the two qualitative-quantitative combination strategies is presented.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11567/1101359
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