Radial discontinuities in low-energy magnetospheric plasma observed on GEOS-1

Details Radial discontinuities in low-energy magnetospheric plasma observed on GEOS-1 Radial discontinuities in low-energy magnetospheric plasma observed on GEOS-1

Aug 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979esasp.148...75k&link_type=abstract

In ESA Magnetospheric Boundary Layers p 75-79 (SEE N80-13529 04-42)

Other

Cosmic Plasma, Earth Magnetosphere, Geos 1 Satellite, Radial Distribution, Boundary Layer Plasmas, Electric Field Strength, Magnetohydrodynamic Flow, Magnetopause, Particle Flux Density

Scientific paper

The GEOS 1 orbit is ideally suited to studying the low latitude magnetosphere between three and seven Earth radii at all local times. The long-boom electric field sensors operated continuously in a negative current bias mode and therefore, provided plasma density as a by-product. These data were evaluated in terms of radial density gradients. A marked density reduction from 100 to 50/cu cm is normally observed around four Earth radii at all local times. In the local time sector near 16:00, the average density is high, often close to 50/cu cm, all the way out to seven Earth radii. At other local times, the density beyond four Earth radii falls rapidly to values in the range 5 to 20/cu cm and thereafter decreases only slightly with radial distance. A second decrease to less than 5/cu cm if often recorded as well, primarily in the dusk-midnight sector. This boundary coincides with previous observations of the inner edge of the plasma sheet and also agrees with the trend shown by the particle experiments on GEOS 1.

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