Physics
Scientific paper
Jul 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990jgr....9510707b&link_type=abstract
Journal of Geophysical Research (ISSN 0148-0227), vol. 95, July 1, 1990, p. 10707-10710.
Physics
17
Boundary Layer Plasmas, Current Sheets, Geomagnetic Tail, Plasma Currents, Plasma Flux Measurement, Ampte (Satellites), Atmospheric Models, Electron Density (Concentration), Ion Concentration
Scientific paper
About 275,000 plasma measurements with the AMPTE/IRM satellite in the magnetotail are used for a statistical survey on the geometry of the near-earth plasma sheet. Near the midnight meridian the plasma sheet has a typical thickness of 6 earth radii; at its flanks it is more than twice as thick. The average plasma sheet thickness does not vary much with the absolute value of X(GSM) during disturbed intervals, but during quiet periods the plasma sheet is considerably thinner at greater distances. The best chances to see the plasma-sheet boundary layer are near absolute value of Z(NS) = about 5 earth radii, except during quiet times for the absolute value of X(GSM) greater than 15 earth radii. In the latter case, the plasma sheet boundary layer is much closer to the neutral sheet, and the central plasma sheet may often be thinner than 2 earth radii.
Baumjohann Wolfgang
Paschmann Goetz
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