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Ann. Geophys., 23, 2909-2914, 2005
www.ann-geophys.net/23/2909/2005/
© European Geosciences Union 2005
Double Star/Cluster observation of neutral sheet oscillations on 5 August 2004
T. L. Zhang1,4, R. Nakamura1, M. Volwerk1,6, A. Runov1, W. Baumjohann1, H. U. Eichelberger1, C. Carr2, A. Balogh2, V. Sergeev3, J. K. Shi4, and K.-H. Fornacon5
1Space Research Institute, Austrian Academy of Sciences, 8042 Graz, Austria
2Imperial College, London, UK
3St. Petersburg University, Russia
4Laboratory for Space Weather, Chinese Academy of Sciences, Beijing, China
5Institut für Geophysik und extraterrestrische Physik, Braunschweig, Germany
6Max-Planck Institut für extraterrestrische Physik, Garching, Germany
Abstract. Previous Cluster observations have shown that the flapping motions of the
Earth's magnetotail are of internal origin and that kink-like waves are
emitted from the central part of the tail and propagate toward the tail
flanks. The newly launched Double Star Program (DSP) TC-1 satellite allows
us to investigate neutral sheet at 10-13 Re in the tail. Using conjunctions
with Cluster we will have simultaneous observations at 10-13 and 16-19 Re of
these flapping motions. In this paper, we present the first results of
neutral sheet oscillations observed by the Cluster and Double Star
satellites on 5 August 2004.
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