University of Minnesota
School of Physics & Astronomy

Physics and Astronomy Calendar

Friday, February 26th 2016
2:30 pm:
Speaker: Jamesina Simpson, U. of Utah
Subject: Maxwell’s Equations Modeling of Electromagnetic Wave Propagation in the Global Earth-Ionosphere Waveguide via the FDTD Method

Prof. Simpson’s research group is developing advanced full-wave Maxwell's equations models of electromagnetic wave propagation in the global Earth-ionosphere waveguide based on the finite-difference time-domain (FDTD) method. As a grid-based and time-domain method, FDTD permits simulation of arbitrary time-varying sources, as well as modeling of detailed geometries such as the Earth’s complete topography, oceans, geomagnetic field, and magnetized ionospheric plasma composition variation with position, altitude, and time of day. Previously, the global FDTD models have been applied to a variety of applications ranging from Schumann resonances to hypothesized electromagnetic precursors to earthquakes, remote-sensing of oil fields, and remote-sensing of localized ionospheric anomalies. More recently, her research group is extending the capabilities of the models and applying them to target detection within the oceans, geolocation at very low frequencies, stochastic FDTD modeling of ionospheric propagation, and space weather hazards to electric power grids.

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