The effects of different field aligned ionization models on the electron densities and total flux tube contents deduced from whistlers

Details The effects of different field aligned ionization models on the electron densities and total flux tube contents deduced from whistlers The effects of different field aligned ionization models on the electron densities and total flux tube contents deduced from whistlers

Mar 1975

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975ang....31...69r&link_type=abstract

(European Geophysical Society, Physics of the Plasmapause Symposium, 2nd, Trieste, Italy, Sept. 23-26, 1974.) Annales de Geophys

Physics

Atmospheric Ionization, Ionospheric Electron Density, Magnetic Field Configurations, Magnetic Flux, Whistlers, Atmospheric Models, Exosphere, Ionospheric Ion Density, Magnetospheric Electron Density, Mathematical Models, Plasmapause, Radio Observation, Time Lag

Scientific paper

Results are compared which are obtained when different physical and empirical models for the ionization distribution along whistler propagation paths are used for whistler analysis. Five models are briefly described, including the empirical r-to-the-inverse-fourth-power model, the constant density model, the diffusion equilibrium model, the gyrofrequency model, the collisionless model of Evitar et al. (1964) for a nonrotating planet, and a similar one developed by Lemaire (1973) which includes a finite rotation rate. The equatorial and exobase densities are calculated for these models together with the total flux-tube content, nose frequency - time delay characteristics are computed, and the first model is used as the reference for the comparisons. The results indicate that inferred values of the equatorial densities are not as sensitive to the model choice as are the electron densities at 1000 km altitude. Good agreement is found between the reference model and the physical exospheric models of Evitar et al. and Lemaire, providing strong support for the validity of the kinetic theory of ion-exospheres.

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