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| Titel |
Tracking heliospheric disturbances by interplanetary scintillation |
| VerfasserIn |
M. Tokumaru, M. Kojima, K. Fujiki, M. Yamashita |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1023-5809
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| Digitales Dokument |
URL |
| Erschienen |
In: Nonlinear Processes in Geophysics ; 13, no. 3 ; Nr. 13, no. 3 (2006-08-01), S.329-338 |
| Datensatznummer |
250011777
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| Publikation (Nr.) |
 copernicus.org/npg-13-329-2006.pdf |
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| Zusammenfassung |
| Coronal mass ejections are known as a solar cause of significant
geospace disturbances, and a fuller elucidation of their physical
properties and propagation dynamics is needed for space weather
predictions. The scintillation of cosmic radio sources caused by
turbulence in the solar wind (interplanetary scintillation; IPS) serves
as an effective ground-based method for monitoring disturbances in the
heliosphere. We studied global properties of transient solar wind
streams driven by CMEs using 327-MHz IPS observations of the
Solar-Terrestrial Environment Laboratory (STEL) of Nagoya University. In
this study, we reconstructed three-dimensional features of the
interplanetary (IP) counterpart of the CME from the IPS data by applying the
model fitting technique. As a result, loop-shaped density enhancements
were deduced for some CME events, whereas shell-shaped high-density
regions were observed for the other events. In addition, CME speeds were
found to evolve significantly during the propagation between the corona
and 1 AU. |
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