Approximate Schumann resonance parameters for a two-scale-height ionosphere

An isotropic, spherically symmetric two-scale-height ionosphere's transverse magnetic mode eigenfrequencies, as well as the height and angular profiles of its electric and magnetic fields, are presently addressed by an approximate solution. The electromagnetic energy in the eigenmodes is equally partitioned between the electric and magnetic fields, allowing a simple expression of the relative degrees of dissipation within the radial and tangential dissipation layers. The results obtained may be relevant to interpretations of the temporal variations in the Schumann resonances.