 |
| Titel |
Conjugate observation of sharp dynamical boundary in the inner magnetosphere by Cluster and DMSP spacecraft and ground network |
| VerfasserIn |
S. V. Apatenkov, V. A. Sergeev, O. Amm, W. Baumjohann, R. Nakamura, A. Runov, F. Rich, P. Daly, A. Fazakerley, I. Alexeev, J. A. Sauvaud, Yu. Chotyaintsev |
| Medientyp |
Artikel
|
| Sprache |
Englisch
|
| ISSN |
0992-7689
|
| Digitales Dokument |
URL |
| Erschienen |
In: Annales Geophysicae ; 26, no. 9 ; Nr. 26, no. 9 (2008-09-17), S.2771-2780 |
| Datensatznummer |
250016226
|
| Publikation (Nr.) |
 copernicus.org/angeo-26-2771-2008.pdf |
|
|
|
|
|
| Zusammenfassung |
| We investigate an unusual sharp boundary separating two plasma populations
(inner magnetospheric plasma with high fluxes of energetic particles and
plasma sheet) observed by the Cluster quartet near its perigee on 16 December 2003.
Cluster was in a pearl-on-string configuration at 05:00 MLT and mapped along
magnetic field lines to ~8–9 RE in the equatorial plane. It was
conjugate to the MIRACLE network and the DMSP F16 spacecraft passed close to
Cluster footpoint. The properties of the sharp boundary, repeatedly crossed 7
times by five spacecraft during ~10 min, are: (1) upward FAC sheet
at the boundary with ~30 nA/m2 current density at Cluster and
~2000 nA/m2 at DMSP; (2) the boundary had an embedded layered
structure with different thickness scales, the electron population transition
was at ~20 km scale at Cluster (<7 km at DMSP), proton population had
a scale ~100 km, while the FAC sheet thickness was estimated to be
~500 km at Cluster (~100 km at DMSP); (3) the boundary propagated
in the earthward-eastward direction at ~8 km/s in situ
(equatorward-eastward ~0.8 km/s in ionosphere), and then decelerated
and/or stopped. We discuss the boundary formation by the collision of two
different plasmas which may include dynamical three-dimensional field-aligned
current loops. |
| |
|
| Teil von |
|
|
|
|
|
|
|
|