Modeling Electromagnetic Wave Propagation in Planetary Cavities using COMSOL Multiphysics Tools

F. Simões
CETP/IPSL, Saint Maur des Fossés, France

The study of extremely low frequency electromagnetic wave propagation in the ionospheric cavities of celestial bodies in the Solar System follows an approach similar to that developed for the Earth. It contributes to the characterization of the atmospheric electric circuit and associated energy sources, and to the identification of the inner and outer cavity boundaries.

A wave propagation, 3D finite element model is developed and applied to relevant planets and satellites, in particular to study the Schumann resonances possibly excited in the cavities.

The input parameters of the model include the cavity geometry, the ionized atmosphere characteristics, the refractivity of the neutral atmosphere, and the top subsurface complex permittivity.