Electrical and Computer Engineering ETDs


Ryan Schlegel

Publication Date



Electromagnetic wave propagation in the Earth-ionosphere cavity presents an interesting challenge for simulations. Three-dimensional latitude-longitude finite-difference time-domain (FDTD) models accounting for the bathymetry, topography and ionosphere have been developed and applied towards a number of applications previously. However, to date most of these models treat the ionosphere as a simple, isotropic exponential conductivity profile. Only recently has a latitude-longitude FDTD model been developed that treats the ionosphere as a magnetized cold plasma. This opens the door to modeling electromagnetic phenomena at higher frequencies and higher altitudes by accommodating more physics. Further, a geodesic (hexagonal-pentagonal) FDTD model that is more efficient, is easier to implement, and executes faster than latitude-longitude models has been recently developed. In this thesis, the magnetized cold plasma global latitude-longitude algorithm is adapted and implemented for the first time in a geodesic FDTD model of the Earth-ionosphere cavity.

Document Type




Degree Name

Electrical Engineering

Level of Degree


Department Name

Electrical and Computer Engineering

First Advisor

Simpson, Jamesina

Second Advisor

Gilmore, Mark

First Committee Member (Chair)

Graham, Edward, Jr

Second Committee Member

Lester, Luke