Total solar eclipse effects on VLF signals: Observations and modeling

Abstract

The effect of solar eclipse on very low frequency (VLF) signal and the behavior of the D region of the ionosphere was discussed. The propagation of radio waves of the VLF transmitters inside the waveguide formed by the lower ionosphere and the earth's surface was also observed. The change in the lower ionosphere resulted in the variation in the received amplitude and phase including the change due to solar zenith angle. The phase and solar perturbation related with total solar eclipse was also discussed.