All Physics Faculty Publications
Document Type
Article
Journal/Book Title/Conference
Journal of Geophysical Research
Volume
90
Issue
A7
Publisher
American Geophysical Union
Publication Date
1985
First Page
6379
Last Page
6385
Abstract
During periods of extended quiet geomagnetic activity the geosynchronous satellite orbit lies inside the plasmasphere. Five such periods were observed by the GEOS 2 satellite. During the initial 48 hours of such periods the equatorial plasma flux tube density increases at 30 to 50 cm−3/day. However, on reaching ∼100 cm−3 the refilling rate decreases, and refilling is limited. Only when the density reaches ∼100 cm−3 do the plasma characteristics and fluctuations appear to be plasmaspheric and the flow predominantly corotational. The “hot outer zone” of the plasmasphere is highly structured in density and temperature when viewed from a corotating satellite. This region also has a relatively dense population of warm subkilovolt electrons. These warm electrons whose density is ∼1% to 50% of the cold plasma may be the heat source for the hot outer zone ions.
Recommended Citation
Sojka, J. J., and G. L. Wrenn (1985), Refilling of Geosynchronous Flux Tubes as Observed at the Equator by GEOS 2, J. Geophys. Res., 90(A7), 6379–6385, doi:10.1029/JA090iA07p06379.
Comments
Originally published by the American Geophysical Union. This article appears in the Journal of Geophysical Research: Space Science.