HR: 0800h
AN: SM21A-0442    [Abstracts]
TI: Multipoint Observations of Magnetospheric Oxygen Ions at the Dusk Flank Magnetopause: a Case Study with Cluster
AU: * Marcucci, M
EM: federica@ifsi.rm.cnr.it
AF: IFSI - CNR, Via Fosso del Cavaliere 100, Rome, 00133 Italy
AU: Bavassano Cattaneo, M
AF: IFSI - CNR, Via Fosso del Cavaliere 100, Rome, 00133 Italy
AU: Pallocchia, G
AF: IFSI - CNR, Via Fosso del Cavaliere 100, Rome, 00133 Italy
AU: Amata, E
AF: IFSI - CNR, Via Fosso del Cavaliere 100, Rome, 00133 Italy
AU: Reme, H
AF: CESR/CNRS, 9 Avenue du Colonel Roche, Toulouse, 31028 France
AU: Dandouras, I
AF: CESR/CNRS, 9 Avenue du Colonel Roche, Toulouse, 31028 France
AU: Kistler, L
AF: Space Science Center, New Hampshire University, Durham, NH NH-03824 United States
AU: Klecker, B
AF: MPE, Giessenbachstrasse, Garching, 85748 Germany
AU: Korth, A
AF: MPS, Max-Planck-Str. 2, Katlenburg-Lindau, 37191 Germany
AU: Balogh, A
AF: Imperial College, Prince Consort Road, London, SW7 2BZ United Kingdom
AB: We present Cluster CIS observations along the dusk flank magnetopause during an outbound orbit on November 20, 2001. Cluster detects magnetospheric oxygen ions both in the boundary layer inside the magnetopause and in the adjacent magnetosheath. Oxygen presence lasts for several hours while the spacecraft move from 22 to -2 degree GSM latitude at approximately 19 MLT. Just inside the magnetopause two different oxygen populations seem to coexist, a high energy population and a tailward flowing population which is detected also outside the magnetopause. The plasma three dimensional distribution functions measured by the three spacecraft are studied in detail and under variable interplanetary magnetic field orientation.
DE: 2724 Magnetopause, cusp, and boundary layers
SC: SPA-Magnetospheric Physics [SM]
MN: 2004 AGU Fall Meeting