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| Titel |
SMEI direct, 3-D-reconstruction sky maps, and volumetric analyses, and their comparison with SOHO and STEREO observations |
| VerfasserIn |
B. V. Jackson, P. P. Hick, A. Buffington, M. M. Bisi, J. M. Clover |
| 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 ; 27, no. 11 ; Nr. 27, no. 11 (2009-11-02), S.4097-4104 |
| Datensatznummer |
250016695
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| Publikation (Nr.) |
 copernicus.org/angeo-27-4097-2009.pdf |
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| Zusammenfassung |
| In this paper we present the results of the analysis of the late January
2007 Coronal Mass Ejection (CME) events recorded by the Solar Mass Ejection
Imager (SMEI), the Solar TErrestrial RElations Observatory (STEREO), and the
SOlar and Heliospheric Observatory (SOHO) spacecraft. This period occurs
when the two STEREO spacecraft views are from close to Earth, and thus the
views from both SMEI and the STEREO outer Heliospheric Imagers (HI-2s)
coincide. Three-dimensional (3-D) analyses derived from SMEI data show many
CMEs that have also been studied by others using short-term image
subtractions (image-differencing techniques). During this interval we map
several CME structures that are observed in both SMEI and the STEREO-A HI
instruments. SMEI brightness analyses provided by short-term image
subtractions ("difference images") and, alternatively, subtractions of a
mean-brightness fit over a long-time duration, both show the extents of the
CMEs travelling outward above the East limb that erupted from the Sun on 24
and 25 January 2007. The SMEI 3-D-reconstructions not only enhance distinct
features within the CME events, but also reconcile difference-imaging
results with those where a long-term base has been removed. In the January
2007 example the structure as mapped by CME difference images traces the
sharp intensity gradients at the front of the CMEs; generally brighter
ejected material follows behind the location of the CME front, but shows
poorly in these because of its larger angular extent. Using the
long-duration background removal enables SMEI's 3-D analysis to determine a
mass for this CME sequence North of the ecliptic. |
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