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| Titel |
In situ magnetotail magnetic flux calculation |
| VerfasserIn |
M. A. Shukhtina, E. Gordeev |
| 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 ; 33, no. 6 ; Nr. 33, no. 6 (2015-06-18), S.769-781 |
| Datensatznummer |
250121214
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| Publikation (Nr.) |
 copernicus.org/angeo-33-769-2015.pdf |
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| Zusammenfassung |
| We explore two new modifications of the magnetotail magnetic flux
(F) calculation algorithm based on the
Petrinec and Russell (1996) (PR96) approach of the tail
radius determination. Unlike in the PR96 model, the tail radius
value is calculated at each time step based on simultaneous
magnetotail and solar wind observations. Our former algorithm,
described in Shukhtina et al. (2009), required that the "tail
approximation" requirement were fulfilled, i.e., it could be applied only
tailward x ∼ −15 RE. The new modifications take into account
the approximate uniformity of the magnetic field of external
sources in the near and middle tail. Tests, based on magnetohydrodynamics
(MHD) simulations, show that this approach may be applied at smaller
distances, up to x ∼ −3 RE. The tests also show that the
algorithm fails during long periods of strong positive interplanetary magnetic field (IMF) Bz.
A new empirical formula has also been obtained for the tail
radius at the terminator (at x = 0) which improves the
calculations. |
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