Application of Occam's inversion to airborne time-domain electromagnetics

holistic approach to inversion of frequency - domain airborne EM data

We have developed a holistic method for simultaneously calibrating, processing, and inverting frequency-domain airborne electromagnetic data. A spline-based, 3D, layered conductivity model covering the complete survey area was recovered through inversion of the entire raw airborne data set and available independent conductivity and interface-depth data. The holistic inversion formulation includ...

Advances in electromagnetic modeling based on integral equation methods and their application to 3D inversion of time-domain airborne data

Thirty-five years ago, Gerald W. Hohmann, late Professor of Geophysics at The University of Utah, published a seminal paper on 3D electromagnetic (EM) modeling using the integral equation (IE) method. This achievement subsequently inspired a considerable body of research in 3D EM modeling and inversion. Over the decades, the IE method evolved from the academic intrigue of EM fields scattering f...

Time-Domain Algorithms for Computational Electromagnetics

Application of Time Domain and Single Frequency Waveform Inversion to Real Data

Locally implicit discontinuous Galerkin method for time domain electromagnetics

In the recent years, there has been an increasing interest in discontinuous Galerkin time domain (DGTD) methods for the solution of the unsteady Maxwell equations modeling electromagnetic wave propagation. One of the main features of DGTD methods is their ability to deal with unstructured meshes which are particularly well suited to the discretization of the geometrical details and heterogeneou...