Electron density profiles in the lower ionosphere deduced from long path VLF wave propagation


  • K. Rinnert


Based on waveguide mode theory and a simple model to calculate the ionospheric reflection coefficient, electron density profiles are deduced from VLF data. A simplified day/night transition model is described. It is appropriate for explaining the mode conversion during sunset and sunrise and leads to conclusions concerning the change of the electron density profile within the transition region.