Thermal response of the F region ionosphere in artificial modification experiments by HF radio waves

Details Thermal response of the F region ionosphere in artificial modification experiments by HF radio waves Thermal response of the F region ionosphere in artificial modification experiments by HF radio waves

Feb 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981jgr....86..561m&link_type=abstract

Journal of Geophysical Research, vol. 86, Feb. 1, 1981, p. 561-574. Research supported by the University of Crete

Physics

41

Atmospheric Heating, F Region, Night Sky, Plasma Heating, Radio Frequency Heating, Electron Energy, High Frequencies, Ionospheric Temperature, Radar Scattering, Time Response, Vertical Distribution

Scientific paper

The thermal response of the nighttime F region ionosphere to local heating by HF radio waves has been observed with the incoherent scatter radar at Arecibo, Puerto Rico. The observations consist of high-resolution space and time variation of the electron temperature as a high-power HF transmitter is switched on and off with a period 240 s. As soon as the HF transmitter is turned on, the electron temperature begins to rise rapidly in a narrow altitude region near 300 km, below the F2 layer peak. The electron temperature perturbation subsequently spreads over a broader altitude region. The observations are compared with the anticipated thermal response of the ionosphere based on numerical solutions of the coupled time-dependent heat conduction equations for the electron and composite ion gases and are found to be in good agreement over the entire altitude region covered by the observations.

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