Synthetic aperture processing of electromagnetic sounding in conductive media

Meir Gershenson

doi:10.1117/12.365714

15 October 1999 Synthetic aperture processing of electromagnetic sounding in conductive media

Meir Gershenson

Proceedings Volume 3752, Subsurface Sensors and Applications; (1999) https://doi.org/10.1117/12.365714
Event: SPIE's International Symposium on Optical Science, Engineering, and Instrumentation, 1999, Denver, CO, United States

Abstract

Electromagnetic signals propagate underwater following a diffusion equation. Using similarities between the diffusion equation and wave propagation, a transformation between the diffusion and the wave propagation can be performed employing the equivalent wave field (EWF). Using EWF, it is possible to apply enhancements developed for wave propagation to diffusive propagation. Synthetic Aperture Radar (SAR) is one of the enhancements used in a conventional wave field. Using wide- band electromagnetic transmission and the EWF, it is possible to detect and localized underwater conductivity anomalies. SAR is known to improve the signal-to-noise ratio and the resolution. SAR together with EWF was applied to synthetic data of a conducting sphere embedded in an infinite ocean. Noise was added to the signal. A major improvement in the detection and resolution was demonstrated.

Citation Download Citation

Meir Gershenson "Synthetic aperture processing of electromagnetic sounding in conductive media", Proc. SPIE 3752, Subsurface Sensors and Applications, (15 October 1999); https://doi.org/10.1117/12.365714

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