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A statistical study of plasma sheet dynamics using ISEE 1 and 2 energetic particle flux dataPlasma sheet dynamics during substorms are studied by analyzing 461 cases of transient dropout events of the 1.5 and 6-keV particle fluxes detected by ISEE 1 and 2 satellites. The instruments for detecting low- and high-energy particles are described. The spatial distribution of flux dropout events, and the events' relationship to magnetospheric activity level are examined. Substorm events without observed flux dropout events are investigated. The data reveal that the flux dropout distribution is isotropic, between 12-23 earth radii, and is present in the entire nightside plasma sheet; and the substorms without flux dropout are more frequent near earth and magnetospheric flanks. It is observed that tailward of 12 earth radii the flux dropout events and substorms without flux dropout are similar. The Chao et al. (1977) MHD rarefaction wave propagation model and the Hones (1973, 1980) near-tail, X-type magnetic neutral line formation model are discussed and compared to the experimental data. It is noted that neither model explains the plasma sheet dynamics observed.
Document ID
19860057099
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Dandouras, J.
(Centre d'Etude Spatiale des Rayonnements Toulouse, France)
Reme, H.
(Centre d'Etude Spatiale des Rayonnements Toulouse, France)
Saint-Marc, A.
(Centre d'Etude Spatiale des Rayonnements Toulouse, France)
Sauvaud, J. A.
(Centre d'Etude Spatiale des Rayonnements Toulouse, France)
Parks, G. K.
(Washington, University Seattle, United States)
Date Acquired
August 12, 2013
Publication Date
June 1, 1986
Publication Information
Publication: Journal of Geophysical Research
Volume: 91
ISSN: 0148-0227
Subject Category
Geophysics
Accession Number
86A41837
Funding Number(s)
CONTRACT_GRANT: CNES-84-003
Distribution Limits
Public
Copyright
Other

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