Coupling fluxes in the presence of cross L drifts - A comparison of whistler mode and radio beacon results

Physics

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Ionospheric Drift, Ionospheric Electron Density, Magnetospheric Electron Density, Radio Beacons, Whistlers, Atmospheric Models, Plasmapause, Plasmasphere, Very Low Frequencies

Scientific paper

On the basis of plasmasphere column content models, Davies et al. (1979) deduced the existence of ionsophere/magnetosphere coupling fluxes of order 1 x 10 to the 13th el/sq m/s per hemisphere, driven by compressed tubes of plasma in the course of an E x B drift. Such large fluxes should be easily detectable on a VLF whistler mode experiment but have not been seen. Data from that experiment are presented that show inward drifts at L = 2.3 accompanied at times by small upward fluxes. This is in agreement with measurements regarding the dynamics of the ionosphere at latitudes approaching the plasmapause. Calculations show that column content measurements may be insensitive to compression effects even in the absence of fluxes.

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