Title :
3-D FDTD modeling of ULF/ELF propagation within the global Earth-ionosphere cavity using an optimized geodesic grid
Author :
Simpson, Jamesina J. ; Heikes, Ross P. ; Taflove, Allen
Author_Institution :
ECE Dept., Northwestern Univ., Evanston, IL, USA
Abstract :
We discuss an emerging application of finite-difference time-domain (FDTD) computational electrodynamics: modeling transient ultra-low frequency (ULF) and extremely low frequency (ELF) propagation within the global Earth-ionosphere cavity. This permits for the first time a direct, three-dimensional, time-domain calculation of round-the-world ULV/ELF propagation accounting for arbitrary horizontal as well as vertical geometrical and electrical inhomogeneities and anisotropies of the excitation, ionosphere, lithosphere, and oceans.
Keywords :
Earth crust; Earth-ionosphere waveguide; anisotropic media; computational electromagnetics; electrodynamics; finite difference time-domain analysis; geodesy; inhomogeneous media; radiowave propagation; 3D FDTD modeling; computational electrodynamics; excitation anisotropies; extremely low frequency propagation; finite-difference time-domain method; global Earth-ionosphere cavity; horizontal geometrical inhomogeneities; ionosphere; lithosphere; oceans; optimized geodesic grid; round-the-world ULV/ELF propagation; three-dimensional time-domain calculation; transient ultra-low frequency propagation; vertical electrical inhomogeneities; Anisotropic magnetoresistance; Computational electromagnetics; Computational modeling; Finite difference methods; Frequency; Geophysical measurement techniques; Ground penetrating radar; Ionosphere; Oceans; Time domain analysis;
Conference_Titel :
Antennas and Propagation Society International Symposium, 2005 IEEE
Print_ISBN :
0-7803-8883-6
DOI :
10.1109/APS.2005.1552254
