Effect of sporadic ionization in the polar E-region on the field level of probe short-wave signals during oblique sounding

Computer Science – Sound

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Atmospheric Ionization, E Region, Ionospheric Sounding, D Region, Energetic Particles, Ionospheric Electron Density, Short Wave Radio Transmission

Scientific paper

Experimental data on the oblique sounding of the auroral ionosphere via short-wave signals are examined. It is shown that the appearance of sporadic ionization on the radio path in the E-region with fbEs not less than 3-4 MHz can lead to a substantial decrease in the signal field level due to scattering by electron density irregularities in the sporadic E layer. This decrease can amount to 30-50 dB, which is comparable to D-region absorption during moderate penetrations of high-energy particles.

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