Plasma sheet access to geosynchronous orbit: Generalization to numerical global field models

Details Plasma sheet access to geosynchronous orbit: Generalization to numerical global field models Plasma sheet access to geosynchronous orbit: Generalization to numerical global field models

Dec 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001jgr...10629655k&link_type=abstract

Journal of Geophysical Research, Volume 106, Issue A12, p. 29655-29668

Physics

12

Magnetospheric Physics, Magnetospheric Physics: Magnetosphere-Inner, Magnetospheric Physics: Numerical Modeling, Magnetospheric Physics: Plasma Convection

Scientific paper

A previous statistical analysis of the geosynchronous particle environment by Korth et al. [1999] showed that the particle fluxes are well organized by local time and the geomagnetic activity as measured by the Kp index. Regions of high and low fluxes at geosynchronous orbit are separated from each other by distinct boundaries, approximately matching the Alfvén boundary crossings of the geosynchronous satellites calculated analytically from a Volland-Stern electric potential and a dipole magnetic field. Expanding the analysis technique from the previous work to arbitrary, numerical electric and magnetic field models, we reevaluate the Alfvén boundary crossings using several available global electric potential models and considering external magnetic field contributions. The more sophisticated numerical models do not do a better job of explaining the observed average access of plasma sheet material to the geosynchronous region than does the simple analytical model.

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