Dispersive shift in the height of the lower edge of the ionosphere under the influence of strong perturbations in tropospheric conductivity

摘要

In the presence of large mesospheric electric fields (1–10 V/m), great perturbations in tropospheric conductivity act to shift the lower edge of the ionosphere upwards (∼4–7 km in the daytime and ∼ 5–8 km at night) for VLF radio waves and downwards for HF radio waves (∼ 6–8 km at 3 MHz).