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A new technique to model plasmoid magnetic field signatures
Author(s) -
Nakamura T. K.,
Nagai T.,
Kazama Y.,
Amano K.,
Yamamoto T.,
Kokubun S.
Publication year - 1995
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/95gl02816
Subject(s) - plasmoid , satellite , computational physics , physics , magnetic field , field (mathematics) , function (biology) , geophysics , magnetic reconnection , mathematics , biology , quantum mechanics , astronomy , evolutionary biology , pure mathematics
A new fitting method has been developed and applied to the plasmoid observations of the GEOTAIL satellite. This method, which we call “soft fitting”, is regarded as one kind of least square method, and can determine both the fitting function and fitting parameters simultaneously. Its application to magnetic field observations by the GEOTAIL satellite gives an average shape of plasmoid Bz bipolar structures. The method can also provide information about the velocity and spatial size of plasmoids from the optimal fitting parameters. The result indicates that the velocity and size become larger as a plasmoid propagates tailward.