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Reconstruction of global micropulsations in the magnetosphere

Published online by Cambridge University Press:  13 March 2009

M. H. Whang ,
S. P. Kuo  and
M. C. Lee
M. H. Whang
Affiliation:
Department of Electrical Engineering/Computer Science, Weber Research Institute, Polytechnic University, Farmingdale, New York 11735, U.S.A.
S. P. Kuo
Affiliation:
Department of Electrical Engineering/Computer Science, Weber Research Institute, Polytechnic University, Farmingdale, New York 11735, U.S.A.
M. C. Lee
Affiliation:
Plasma Fusion Center, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, U.S.A.
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Abstract

The coupling of hydromagnetic Alfvén waves is studied numerically in a dipolc-field model of the magnetosphere. The two coupled hydromagnetic equations derived by Radoski are solved as an implicit boundary-value problem, namely the boundary conditions at the magnetopause are determined self-consistently. Thus the calculated wave-field distribution inside the magnetosphere can match all known linear characteristic features of the stormtime Pc5 waves observed on 14/15 November 1979 from satellites. A set of proper boundary conditions is found, excellent agreement between the numerical results and observations is demonstrated. Based on the very limited spatial coverage (L ≈ 6·6 and within a latitudinal region ( −10°, 10°)), of the data provided by the satellites, the theoretical model can successfully reconstruct the global micropulsations in the magnetosphere and identify the source regions of hydromagnetic waves.

Type
Research Article
Information
Journal of Plasma Physics , Volume 45 , Issue 2 , April 1991 , pp. 159 - 172
Copyright
Copyright © Cambridge University Press 1991

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