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| Titel |
Performance of ERNE in particle flux anisotropy measurement |
| VerfasserIn |
E. Riihonen, J. Torsti, A. Anttila, J. Kuusela, M. Lumme, E. Valtonen |
| 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 ; 14, no. 5 ; Nr. 14, no. 5, S.503-509 |
| Datensatznummer |
250012288
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| Publikation (Nr.) |
 copernicus.org/angeo-14-503-1996.pdf |
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| Zusammenfassung |
| The HED particle detector of the ERNE
experiment to be flown on the SOHO spacecraft is unique compared to the earlier
space-born detectors in its high directional resolution (better than 2°,
depending on the track inclination). Despite the fixed view cone due to the
three-axis stabilization of the spacecraft, the good angular and temporal
resolution of the detector provides a new kind of opportunity for monitoring in
detail the development of the anisotropies pertaining, for example, to the onset
of SEP events, or passage of shock fronts related to gradual events. In order to
optimize the measurement parameters, we have made a preflight simulation study
of the HED anisotropy measurement capabilities. The purpose was to prove the
feasibility of the selected measurement method and find the physical limits for
the HED anisotropy detection. The results show HED to be capable of detecting
both strong anisotropies related to impulsive events, and smoother anisotropies
associated with gradual events. |
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