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| Titel |
How do fits of simulated magnetic clouds correspond to their real shapes in 3-D? |
| VerfasserIn |
M. Vandas, E. Romashets, A. Geranios |
| 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 ; 28, no. 8 ; Nr. 28, no. 8 (2010-08-26), S.1581-1588 |
| Datensatznummer |
250016873
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| Publikation (Nr.) |
 copernicus.org/angeo-28-1581-2010.pdf |
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| Zusammenfassung |
| Magnetic clouds are important objects for space weather forecasters
due to
their impact on the Earth's magnetosphere and their consequences during
geomagnetic storms.
Being considered as cylindrical or toroidal flux ropes, their size, velocity,
magnetic field strength, and axis orientation determine its impact
on Earth. Above mentioned parameters are usually extracted from
model fits using measurements from one-spacecraft crossings of these
structures.
In order to relate solar events with these spacecraft observations,
the parameters are then compared to situation at the Sun
around a most probable source region with a goal to correlate them
with near-Sun observed quantities for prediction purposes.
In the past
we performed three-dimensional simulations of magnetic cloud propagation
in the inner heliosphere. Simulated spacecraft measurements are
fitted by models of magnetic clouds and resulting parameters are
compared with real shapes of magnetic clouds which can be directly
obtained from our simulations. The comparison shows that cloud parameters
are determined quite reliably for spacecraft crossings near the cloud axis. |
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