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Ann. Geophys., 19, 1463-1470, 2001
www.ann-geophys.net/19/1463/2001/
© European Geosciences Union 2001
A case study of low-frequency waves at the magnetopause
L. Rezeau1, F. Sahraoui2, E. d’Humières2, G. Belmont2, T. Chust2, N. Cornilleau-Wehrlin2, L. Mellul2, O. Alexandrova2, E. Lucek3, P. Robert2, P. Décréau4, P. Canu2, and I. Dandouras5
1CETP/UPMC, 10–12 avenue de l’Europe, 78140 Vélizy, France
2CETP/UVSQ, 10–12 avenue de l’Europe, 78140 Vélizy, France
3Space and Atmospheric Group, The Blackett laboratory, Imperial College, Prince Consort Rd, London, UK
4LPCE, 3A avenue de la recherche scientifique, 45071 Orléans Cedex 2, France
5CESR, 9 avenue du Colonel Roche, 31028 Toulouse cedex 4, France
Abstract. We present the study of
one of the first magnetopause crossings observed by the four Cluster spacecraft
simultaneously, on 10 December 2000. Although the delays between the crossings
are very short, the features of the boundary appear quite different as seen by
the different spacecraft, strongly suggesting the presence of a local curvature
of the magnetopause at that time. The small-scale fluctuations observed by the
STAFF search-coil experiment are placed in relation to this context. A
preliminary investigation of their behaviour on the boundary and in the
neighbourhood magnetosheath is performed in comparison with the theoretical
model of Belmont and Rezeau (2001), which describes the interaction of waves
with the boundary.
Key words. Space plasma physics
(transport processes, discontinuities, turbulence)
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