Nonlinear thermal focusing of radio waves in the lower ionosphere

Details Nonlinear thermal focusing of radio waves in the lower ionosphere Nonlinear thermal focusing of radio waves in the lower ionosphere

Aug 1976

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976ge%26ae..16..613g&link_type=abstract

Geomagnetizm i Aeronomiia, vol. 16, July-Aug. 1976, p. 613-619. In Russian.

Other

3

Ionospheric Heating, Lower Ionosphere, Plasma-Electromagnetic Interaction, Radio Frequency Heating, Electron Scattering, Focusing, Magnetoionics, Pulse Heating

Scientific paper

It is shown that an intense radio wave can heat the lower ionospheric plasma, producing changes in electron collision frequencies. These changes in collision frequencies through changes in the refractivity of the medium will result in the nonlinear focusing (self-focusing, and thermal focusing) of other radio waves transmitted into the ionosphere. Experiments were conducted to study this phenomenon using two radio waves, one an intense pulsed wave to heat the ionospheric plasma, the other a continuous wave which suffered nonlinear focusing.

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