000003410 001__ 3410
000003410 005__ 20180116111955.0
000003410 037__ $$aPOSTER-2018-0020
000003410 100__ $$aKatsiyannis, Athanassios
000003410 245__ $$aLYRA/EPT Perturbations Project
000003410 260__ $$c2017
000003410 269__ $$c2017-11-28
000003410 520__ $$aTo 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. 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. 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=6 McIlwain zone, which makes it possible to identify their source. Although highly energetic particles are commonly disturbing 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.
000003410 594__ $$aSTCE
000003410 700__ $$aDominique, Marie
000003410 700__ $$aPierrard, Viviane
000003410 700__ $$aLopez Rosson, Graciela
000003410 700__ $$aDe Keyser, Johan
000003410 700__ $$aBerghmans, David
000003410 700__ $$aKruglanski, Michel
000003410 700__ $$aDammasch, Ingolf
000003410 700__ $$aDe Donder, Erwin
000003410 773__ $$t14th European Space Weather Week, Oostende
000003410 8560_ $$fthanassis.katsiyannis@observatoire.be
000003410 980__ $$aCPOSTER