HR: 08:00h
AN: SM11B-01    [Abstracts]
TI: Evolution of Plasma Density and ExB drift Near the Plasmapause Region During Disturbed Intervals
AU: * Laakso, H
EM: Harri.Laakso@esa.int
AF: ESA/ESTEC, Code SCI-SH Postbus 299, Noordwijk, 2200 AG Netherlands
AU: Escoubet, P
AF: ESA/ESTEC, Code SCI-SH Postbus 299, Noordwijk, 2200 AG Netherlands
AU: Khan, H
AF: ESA/ESTEC, Code SCI-SH Postbus 299, Noordwijk, 2200 AG Netherlands
AU: Masson, A
AF: ESA/ESTEC, Code SCI-SH Postbus 299, Noordwijk, 2200 AG Netherlands
AU: Opgenoorth, H
AF: ESA/ESTEC, Code SCI-SH Postbus 299, Noordwijk, 2200 AG Netherlands
AU: Pitout, F
AF: ESA/ESTEC, Code SCI-SH Postbus 299, Noordwijk, 2200 AG Netherlands
AB: We investigate the characteristics of plasma density and ExB drifts in the plasmasphere, plasmapause, and trough regions. We concentrate on the interval of April-June 2001 and use electric field measurements from both Cluster and Polar satellites. The four Cluster satellites, separated by about 600 km and flying in a string-of-pearls formation near the perigee, cross the inner magnetosphere of L = 4-10 every 57 hours and Polar crosses L = 2--10 every 18 hours. During the interval the satellites collect measurements in the 17-23 MLT sector. In addition for every orbit, Polar monitors L = 6--9 shells in the pre-noon sector for nearly 10 hours because of a slow motion of the satellite around the apogee (located close to the equator). The selected interval contains several storms and allows us to investigate density and drift patterns in the inner magnetosphere in variable conditions; in particular we study density profiles and irregularities and how they are correlated with ExB drift observations.
DE: 2712 Electric fields (2411)
DE: 2730 Magnetosphere--inner
DE: 2760 Plasma convection
DE: 2788 Storms and substorms
SC: SPA-Magnetospheric Physics [SM]
MN: 2004 AGU Fall Meeting