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Inversion of airborne electromagnetic data in 2.5D

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Title: Inversion of airborne electromagnetic data in 2.5D
Author: Yu, Wing Wa
Degree Master of Science - MSc
Program Mathematics
Copyright Date: 2012
Publicly Available in cIRcle 2012-10-16
Abstract: In this work, we implement an inversion algorithm for airborne electromagnetic (AEM) data in the frequency domain by using 2D conductivity models. First, we discretize the 2.5D Maxwell's equations on a staggered grid and test the numerical accuracy of the forward solution. The inverse problem is then solved by regularized minimization approach using the limited memory BFGS variant of the quasi-Newton method. Next, EM responses from a synthetic 2D conductivity model are inverted to validate the algorithm. Finally, we use the algorithm on an AEM field dataset from a RESOLVE survey and compare the inversion results to those obtained from a well-established 1D implementation.
URI: http://hdl.handle.net/2429/43416
Scholarly Level: Graduate

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