Contribution of mutual impedance experiments to the understanding of magnetospheric processes

Details Contribution of mutual impedance experiments to the understanding of magnetospheric processes Contribution of mutual impedance experiments to the understanding of magnetospheric processes

Sep 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984esasp.217..705d&link_type=abstract

In ESA Achievements of the Intern. Magnetospheric Study (IMS) p 705-707 (SEE N85-24544 14-46)

Physics

3

Earth Magnetosphere, Geos Satellites (Esa), Impedance Probes, Plasma Diagnostics, High Temperature Plasmas, Magnetic Flux, Magnetohydrodynamic Flow, Plasma Density, Plasma Heating, Plasmasphere

Scientific paper

The GEOS satellites measured the density and temperature of the electron population in the vicinity of geostationnary orbit, using a mutual impedance experiment, free of spacecraft potential effects. Three main plasma regions are: (1) the bulge region of the plasmasphere; (2) a region of intermediate density, corresponding to magnetic flux tubes in the process of being freshly replenished by the ionospheric source; and (3) a trough of low density in the night and morning sectors, where significant departures from thermal isotropic equilibrium are observed. The evolution of the plasma parameters measured in (1) and (2) gives information on physical processes such as ionospheric refilling, the equatorial convection of thermal plasma, and the heating of the electron population.

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