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Radio Science

Anomalous radio wave absorption due to ionospheric heating effects


  • Kristine N. Graham,

  • J. A. Fejer


An ionospheric volume in the F layer subjected to high power high frequency illumination is observed to be an effective scattering medium for radio signals. Experimental results are representative of a field-aligned scattering geometry. Scatter of the incident wave into electrostatic waves by these strongly field-aligned density irregularities is considered. This model explains the large decreases in radio wave reflectivity seen during the ionospheric modification.

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