Variation of the range-frequency characteristics of oblique sounding during the artificial disturbance of the upper ionosphere

Computer Science – Sound

Scientific paper

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F 2 Region, Ionospheric Disturbances, Ionospheric Sounding, Plasma Interactions, Radio Waves, Backscattering, Obliqueness, Radio Frequencies, Radio Range

Scientific paper

Experimental results are presented concerning the effect of a disturbance region in the F2-layer produced by high-power vertical radio waves on the range-frequency characteristics of short-wave oblique-sounding signals obtained with the Soika and Bazis stations. Stable backscattering signals from the disturbed region were detected. A variation in the maximum allowable frequency of a wave reflected from the F2-layer on a midlatitude path 1100 km long was observed. The absolute value of this change (due to wave refraction on the disturbed region) can amount to 20 percent as the equivalent power is increased to 150-200 MW.

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