000003575 001__ 3575
000003575 005__ 20180920143353.0
000003575 037__ $$aCTALK-2018-0063
000003575 100__ $$aKatsiyannis, Athanassios
000003575 245__ $$aThe detection of ultra-relativistic electrons in low Earth orbit by the LYRA instrument on board the PROBA2 satellite
000003575 260__ $$c2018
000003575 269__ $$c2018-08-28
000003575 520__ $$aWe present the 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 in the form of microbursts of <10 ms, with a phenomenon duration of 100 s. Combining Energetic Particle Telescope (EPT/PROBA-V) 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. Additionally, they are well confined geographically within the L=4-6 McIlwain zones, and they show prominent dawn-dusk and day-night asymmetries. Those detections clearly illustrate that although LYRA is built as an EUV irradiometer, it can also reliably detect in-situ relativistic electrons. The scientific value of this discovery and its implication to solar irradiometer designs will also be discussed.
000003575 594__ $$aSTCE
000003575 700__ $$aDominique, Marie
000003575 773__ $$t2018 INSPIRE and Small Sat Workshop, Paris, France
000003575 8560_ $$fthanassis.katsiyannis@observatoire.be
000003575 85642 $$ahttps://events.oma.be/indico/event/51/overview
000003575 8564_ $$s2208056$$uhttp://publi2-as.oma.be/record/3575/files/perturbations_talk_inspire.pptx$$yPowerpoint presentation
000003575 906__ $$aContributed
000003575 980__ $$aCTALKCONT