Conference abstracts

Session A6 - Mathematical Foundations of Data Assimilation and Inverse Problems - Semi-plenary talk

July 10, 17:00 ~ 18:00

Waves and imaging in random media

Josselin Garnier

Ecole Polytechnique, France   -   josselin.garnier@polytechnique.edu

In sensor array imaging an unknown medium is probed by waves emitted by an array of sources and recorded by an array of receivers. Sensor array imaging in a randomly scattering medium is usually limited because coherent signals recorded by the receiver array and coming from a reflector to be imaged are weak and dominated by incoherent signals coming from multiple scattering by the medium. Stochastic and multiscale analysis allows to understand the direct problem and helps solving the inverse problem. We will see in this talk how correlation-based imaging techniques can mitigate or even sometimes benefit from the multiple scattering of waves. Applications to seismic interferometry, non-destructive testing, and intensity correlation imaging in optics will be discussed.

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