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| Titel |
Comparative magnetotail flapping: an overview of selected events at Earth, Jupiter and Saturn |
| VerfasserIn |
M. Volwerk, N. Andre, C. S. Arridge, C. M. Jackman, X. Jia, S. E. Milan, A. Radioti, M. F. Vogt, A. P. Walsh, R. Nakamura, A. Masters, C. Forsyth |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
0992-7689
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| Digitales Dokument |
URL |
| Erschienen |
In: Annales Geophysicae ; 31, no. 5 ; Nr. 31, no. 5 (2013-05-06), S.817-833 |
| Datensatznummer |
250019036
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| Publikation (Nr.) |
 copernicus.org/angeo-31-817-2013.pdf |
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| Zusammenfassung |
| A comparison of magnetotail flapping (the up-and-down wavy motion) between
the Earth and the two giant planets Jupiter and Saturn has been performed
through investigation of the current sheet normal of the magnetotail.
Magnetotail flapping is commonly observed in the Earth's magnetotail. Due to
single spacecraft missions at the giant planets, the normal is determined
through minimum variance analysis of magnetometer data during multiple
intervals when the spacecraft crossed through the current sheet. It is shown
that indeed a case can be made that magnetotail flapping also occurs at
Jupiter and Saturn. Calculations of the wave period using generic magnetotail
models show that the observed periods are much shorter than their theoretical
estimates, and that this discrepancy can be caused by unknown input
parameters for the tail models (e.g., current sheet thickness) and by
possible Doppler shifting of the waves in the spacecraft frame through the
fast rotation of the giant planets. |
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