Inversion of EM38 electrical conductivity data
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Data
2001-07-05
Autori
Bonomi, Ernesto
Manzi, Cristina
Pieroni, Enrico
Deidda, Gian Piero
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Abstract
In geophysical prospecting and environmental monitoring, the frequency domain electromagnetic induction technique has been developed for measuring the apparent soil electrical conductivity. A linear model can be formulated to described the response of the EM38, a ground conductivity meter. To image the subsurface conductivity profile from recorded data, the model has been inverted defining a Least Squares problem with Tikhonov approach improves the conditioning of the resulting linear systems, profile reconstruction can be surprisingly far from the expected conductivity behaviour.
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Keywords
inverse problem , electromagnetic induction, , Tikhonov regularization , ground conductivity , projected conjugate gradient method , EM38