Physics
Scientific paper
May 1975
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975p%26ss...23..843m&link_type=abstract
Planetary and Space Science, vol. 23, May 1975, p. 843-865.
Physics
2
Atmospheric Models, Auroral Zones, Cerenkov Radiation, Electromagnetic Noise, Geomagnetism, Magnetospheric Electron Density, Earth Atmosphere, Electron Energy, Electron Precipitation, Energy Spectra, Frequency Ranges, Geomagnetic Latitude, Hiss, Magnetic Field Configurations, Plasma Density, Plasma Waves, Time Dependence
Scientific paper
Intensities of auroral hiss generated by the Cerenkov radiation process by electrons in the lower magnetosphere are calculated with respect to a realistic model of the earth's magnetosphere. In this calculation, the magnetic field is expressed by the Mead-Fairfield Model (1975), and a static model of the iono-magnetospheric plasma distribution is constructed with data accumulated by recent satellites (Alouette-I, -II, ISIS-I, OGO-4, -6 and Explorer 22). The energy range of hiss producing electrons and the frequency range of the calculated VLF are 100-200 keV, and 2-200 kHz, respectively. The higher rate of hiss occurrence in the daytime side, particularly in the soft electron precipitation zone in the morning sector, and the lesser occurrence of auroral hiss in night-time sectors must be due to the local time dependence of the energy spectra of precipitating electrons rather than the difference in the geomagnetic field and in the geoplasma distributions.
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