| Autor: |
Katsiyannis Athanassios C., Dominique Marie, Pierrard Viviane, Rosson Graciela Lopez, Keyser Johan De, Berghmans David, Kruglanski Michel, Dammasch Ingolf E., Donder Erwin De |
| Jazyk: |
angličtina |
| Rok vydání: |
2018 |
| Předmět: |
|
| Zdroj: |
Journal of Space Weather and Space Climate, Vol 8, p A01 (2018) |
| Druh dokumentu: |
article |
| ISSN: |
2115-7251 |
| DOI: |
10.1051/swsc/2017041 |
| Popis: |
Aims. To better understand the radiation environment in low Earth orbit (LEO), the analysis of in-situ observations of a variety of particles, at different atmospheric heights, and in a wide range of energies, is needed. Methods. We present an analysis of energetic particles, indirectly detected by the large yield radiometer (LYRA) instrument on board ESA's project for on-board autonomy 2 (PROBA2) satellite as background signal. Combining energetic particle telescope (EPT) observations with LYRA data for an overlapping period of time, we identified these particles as electrons with an energy range of 2 to 8 MeV. Results. The observed events are strongly correlated to geo-magnetic activity and appear even during modest disturbances. They are also well confined geographically within the L = 4–6 McIlwain zone, which makes it possible to identify their source. Conclusions. Although highly energetic particles are commonly perturbing data acquisition of space instruments, we show in this work that ultra-relativistic electrons with energies in the range of 2–8 MeV are detected only at high latitudes, while not present in the South Atlantic Anomaly region. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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