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Time Evolution of the Electric Field Using the Rapid Expansion Method with Pseudo-Spectral Evaluation of Spatial Derivat
- Publisher: European Association of Geoscientists & Engineers
- Source: Conference Proceedings, 80th EAGE Conference and Exhibition 2018, Jun 2018, Volume 2018, p.1 - 5
Abstract
The 3D three-component time response of the electric wave field can be simulated numerically by considering the spatial and time responses separately and employing numerical methods best suited for each. Here we use the rapid expansion method to develop the 3-component electric wave field time response from the spatial responses found using a pseudo-spectral method. The results are free of numerical dispersion and accurate to the Nyquist frequency in time and space. The method is intrinsically parallel which leads to computational efficiency. The method developed here is suitable for modeling transient EM data acquired on land or at sea. Numerical results compare favorably with the analytic response and 1D methods even though the computations are intrinsically 3D.