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Ann. Geophys., 19, 1219-1240, 2001
www.ann-geophys.net/19/1219/2001/
© European Geosciences Union 2001
First results of electric field and density observations by Cluster EFW based on initial months of operation
G. Gustafsson1, M. André1, T. Carozzi1, A. I. Eriksson1, C.-G. Fälthammar4, R. Grard5, G. Holmgren8, J. A. Holtet3, N. Ivchenko4, T. Karlsson4, Y. Khotyaintsev1, S. Klimov6, H. Laakso5, P.-A. Lindqvist4, B. Lybekk3, G. Marklund4, F. Mozer2, K. Mursula7, A. Pedersen3, B. Popielawska9, S. Savin6, K. Stasiewicz1, P. Tanskanen7, A. Vaivads1, and J.-E. Wahlund1
1Swedish Institute of Space Physics, Uppsala Division, Uppsala, Sweden
2Space Sciences Laboratory, Berkeley, USA
3University of Oslo, Norway
4Alfvén Laboratory, Stockholm, Sweden
5Space Science Department, ESTEC, Noordwijk, The Netherlands
6Space Research Institute, Moscow, Russia
7University of Oulu, Finland
8University of Uppsala, Sweden
9Space Research Centre, Warsaw, Poland
Abstract. Highlights are presented
from studies of the electric field data from various regions along the Cluster
orbit. They all point towards a very high coherence for phenomena recorded on
four spacecraft that are separated by a few hundred kilometers for structures
over the whole range of apparent frequencies from 1 mHz to 9 kHz. This presents
completely new opportunities to study spatial-temporal plasma phenomena from
the magnetosphere out to the solar wind. A new probe environment was
constructed for the CLUSTER electric field experiment that now produces data of
unprecedented quality. Determination of plasma flow in the solar wind is an
example of the capability of the instrument.
Key words. Magnetospheric physics
(electric fields) – Space plasma physics (electrostatic structures;
turbulence)
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