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| Titel |
Flux variations in the Van Allen Belts observed by CLUSTER/RAPID and PROBA-V/EPT |
| VerfasserIn |
Viviane Pierrard, Kris Borremans, Graciela Lopez Rosson |
| Konferenz |
EGU General Assembly 2014
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 16 (2014) |
| Datensatznummer |
250089472
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| Publikation (Nr.) |
 EGU/EGU2014-3677.pdf |
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| Zusammenfassung |
| Satellite observations have been analyzed to determine the dynamics of the electron radiation belts during geomagnetic quiet and disturbed periods. During geomagnetic storms determined by a drop in the Dst index, the electron differential fluxes in the outer belt vary several orders of magnitude. Flux variations and decay times were estimated from CLUSTER/RAPID observations. Based on these data analysis, a dynamic model of the electron radiation belts is developed for the energy range [244.1-406.5 keV]. Unexpected high fluxes are observed at L=3 for this energy range from 2010 to 2012. Moreover, we analyzed the data of the Energetic Particle Telescope (EPT). This is a new compact and modular ionizing particle spectrometer that was launched on 7 May 2013 in a LEO polar orbit at an altitude of 820 km onboard the Belgian satellite PROBA-V. First results show electron, proton and helium ion fluxes in the South Atlantic Anomaly and at high latitudes, with high flux increases during Solar Energetic Particles events. |
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