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Latitudinal structure of a Coronal Mass Ejection inferred from Ulysses and Geotail observationsWe present the first observations of a Coronal Mass Ejection (CME) by two spacecraft separated substantially in heliographic latitude. Ulysses and Geotail both see similar features in the plasma and magnetic field parameters during an interval in which Geotail is located in the deep magnetosheath (greater than 150 Earth radii) and Ulysses is located in the solar wind at 5 AU, approximately 20 S of Geotail, and approximately 51 W (in the direction of solar rotation) of Geotail. Based on the similarity in plasma and magnetic field parameters and similar inferred ejection times from the Sun for both features we argue that the same CME is observed by both spacecraft. The portion of the CME observed by Ulysses is traveling much faster than the portion observed by Geotail. Thus the CME has significant latitudinal structure since at any given time the high latitude portion of the CME extends much further out in radial distance. Furthermore, this implies that a simple calculation of the arrival time of a CME at the Earth may not be done if the observing spacecraft is located substantially away from the ecliptic plane.
Document ID
19950056915
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Hammond, C. M.
(Los Alamos National Laboratory, Los Alamos, NM United States)
Crawford, G. K.
(Kyoto Univ. Kyoto, Japan)
Gosling, J. T.
(Los Alamos National Laboratory, Los Alamos, NM United States)
Kojima, H.
(Kyoto Univ. Kyoto, Japan)
Phillips, J. L.
(Los Alamos National Laboratory, Los Alamos, NM United States)
Matsumoto, H.
(Kyoto Univ. Kyoto, Japan)
Balogh, A.
(Imperial College London, United Kingdom)
Frank, L. A.
(Univ. of Iowa, Iowa, IA United States)
Kokubun, S.
(Nagoya Univ. Toyokawa, Japan)
Yamamoto, T.
(Sagamihara Kanagawa, Japan)
Date Acquired
August 16, 2013
Publication Date
May 15, 1995
Publication Information
Publication: Geophysical Research Letters
Volume: 22
Issue: 10
ISSN: 0094-8276
Subject Category
Solar Physics
Accession Number
95A88514
Funding Number(s)
CONTRACT_GRANT: NAG5-2371
Distribution Limits
Public
Copyright
Other

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