Wide band attenuation of radio waves caused by powerful HF waves - Saturation and dependence on ionospheric variability

Details Wide band attenuation of radio waves caused by powerful HF waves - Saturation and dependence on ionospheric variability Wide band attenuation of radio waves caused by powerful HF waves - Saturation and dependence on ionospheric variability

Mar 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982jgr....87.1551s&link_type=abstract

Journal of Geophysical Research, vol. 87, Mar. 1, 1982, p. 1551-1555. Research supported by the Deutsche Forschungsgemeinschaft

Physics

40

Broadband, F Region, High Frequencies, Ionospheric Heating, Ionospheric Propagation, Radio Attenuation, Striation

Scientific paper

The phenomenon of wide band attenuation, i.e., anomalous absorption of an HF wave in the F region subjected to modification by a powerful HF wave, has been measured using the Tromso heating facility. Two types of results were found. In a quiet F region situation, the attenuation amounted to approximately 15 dB and did not change when the effective radiated heating power was lowered from 160 to 20 MW. In a variable F region, indicated by a high fading rate of the diagnostic wave, the absorption was considerably less than 15 dB and showed a strong dependence on the heating power. An explanation for both types of results is offered by extending a recent theory of Das and Fejer (1979).

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