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Annales Geophysicae 19, 10/12 (2001) 1303-1354

First multispacecraft ion measurements in and near the Earth's magnetosphere with the identical Cluster ion spectrometry (CIS) experiment

H. Rème 1, C. Aoustin 1, J. M. Bosqued 1, I. Dandouras 1, B. Lavraud 1, J. A. Sauvaud 1, A. Barthe 1, J. Bouyssou 1, Th. Camus 1, O. Coeur-Joly 1, A. Cros 1, J. Cuvilo 1, F. Ducay 1, Y. Garbarowitz 1, J. L. Medale 1, E. Penou 1, H. Perrier 1, D. Romefort 1, J. Rouzaud 1, C. Vallat 1, D. Alcaydé 1, C. Jacquey 1, C. Mazelle 1, C. D'Uston 1, E. Möbius 2, L. M. Kistler 2, K. Crocker 2, M. Granoff 2, C. Mouikis 2, M. Popecki 2, M. Vosbury 2, B. Klecker 3, D. Hovestadt 3, H. Kucharek 3, E. Kuenneth 3, G. Paschmann 3, M. Scholer 3, N. Sckopke 3, E. Seidenschwang 3, C. W. Carlson 4, D. W. Curtis 4, C. Ingraham 4, R. P. Lin 4, J. P. McFadden 4, G. K. Parks 4, T. Phan 4, V. Formisano 5, E. Amata 5, M. B. Bavassano-Cattaneo 5, P. Baldetti 5, R. Bruno 5, G. Chionchio 5, A. Di Lellis 5, M. F. Marcucci 5, G. Pallocchia 5, A. Korth 6, P. W. Daly 6, B. Graeve 6, H. Rosenbauer 6, V. Vasyliunas 6, M. Mccarthy 7, M. Wilber 7, L. Eliasson 8, R. Lundin 8, S. Olsen 8, E. G. Shelley 9, S. Fuselier 9, A. G. Ghielmetti 9, W. Lennartsson 9, C. P. Escoubet 10, H. Balsiger 11, R. Friedel 12, J.-B. Cao 13, R. A. Kovrazhkin 14, I. Papamastorakis 15, R. Pellat 16, J. Scudder 17, B. Sonnerup 18

(2001)

On board the four Cluster spacecraft, the Cluster Ion Spectrometry (CIS) experiment measures the full, three-dimensional ion distribution of the major magnetospheric ions (H+, He+, He++, and O+) from the thermal energies to about 40 keV/e. The experiment consists of two different instruments: a COmposition and DIstribution Function analyser (CIS1/CODIF), giving the mass per charge composition with medium (22.5°) angular resolution, and a Hot Ion Analyser (CIS2/HIA), which does not offer mass resolution but has a better angular resolution (5.6°) that is adequate for ion beam and solar wind measurements. Each analyser has two different sensitivities in order to increase the dynamic range. First tests of the instruments (commissioning activities) were achieved from early September 2000 to mid January 2001, and the operation phase began on 1 February 2001. In this paper, first results of the CIS instruments are presented showing the high level performances and capabilities of the instruments. Good examples of data were obtained in the central plasma sheet, magnetopause crossings, magnetosheath, solar wind and cusp measurements. Observations in the auroral regions could also be obtained with the Cluster spacecraft at radial distances of 4–6 Earth radii. These results show the tremendous interest of multispacecraft measurements with identical instruments and open a new area in magnetospheric and solar wind-magnetosphere interaction physics.

1 :	Centre d'étude spatiale des rayonnements (CESR)
	CNRS : UMR5187 – Observatoire Midi-Pyrénées – INSU – Université Paul Sabatier [UPS] - Toulouse III
2 :	UNH
	UNH
3 :	MPE
	MPE
4 :	SSL
	SSL
5 :	Interplanetary Space Physics Institute (IFSI) (IFSI-INAF)
	Interplanetary Space Physics Institute
6 :	MPAE
	MPAE
7 :	U. W.
	U. W.
8 :	IRF
	IRF
9 :	Lockheed Martin Advanced Technology Laboratories (ATL)
	Lockheed Martin Advanced Technology Laboratories
10 :	ESA/ESTEC
	ESA/ESTEC
11 :	Bern University
	Bern University
12 :	Los Alamos National Laboratory NM
	Los Alamos National Laboratory NM
13 :	CCSAR
	CCSAR
14 :	IKI
	IKI
15 :	University of Crete
	University of Crete
16 :	CEA
	CEA
17 :	University of Iowa
	University of Iowa
18 :	Dartmouth College
	Dartmouth College

Domaine

:

Planète et Univers/Océan, Atmosphère Planète et Univers/Sciences de la Terre

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Soumis le : Lundi 1 Janvier 2001, 08:00:00

Dernière modification le : Vendredi 10 Octobre 2008, 14:48:38