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    Observations of Electron Fluxes in the Radiation Belts with PROBA-V/EPT at Polar Low Earth Orbit and Van Allen Probes/MagEIS at Near Equatorial Elliptical Orbit

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    Authors
    Pierrard, V.
    Botek, E.
    Ripoll, J.-F.
    Reeves, G.
    Thaller, S.A.
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    Discipline
    Physical sciences
    Subject
    Ionizing radiation
    Shape
    Satellite broadcasting
    NASA
    Low earth orbit satellites
    Space radiation
    Telescopes
    Audience
    Scientific
    Date
    2022
    Metadata
    Show full item record
    Description
    The electron fluxes in the outer radiation belt during and after geomagnetic storms were investigated using the EPT (Energetic Particle Telescope) instrument on board the ESA PROBA-V satellite at a polar LEO (Low Earth Orbit) at 820 km of altitude and compared with simultaneous observations of the instrument MagEIS on board the NASA Van Allen Probes circulating on a low inclination elliptical orbit ranging from 600 to 30 600 km.We find that the equatorial trapped electron fluxes observed at MEO (Medium Earth Orbit) are higher than at LEO. Below 1 MeV, maximal fluxes differ by ~2 orders of magnitude. However, the EPT ultra-relativistic flux (>2.4 MeV) is much lower than the Van Allen Probes flux at 2.33 MeV, by 4 to 5 orders of magnitude. We also observe that the outer belt is quite isotropic during quiet times, contrary to the inner belt. During storms (here, the big storm of 23 June 2015), the dropout and flux increase observed at LEO and MEO present very similar shapes.
    Citation
    Pierrard, V.; Botek, E.; Ripoll, J.-F.; Reeves, G.; Thaller, S.A. (2022). Observations of Electron Fluxes in the Radiation Belts with PROBA-V/EPT at Polar Low Earth Orbit and Van Allen Probes/MagEIS at Near Equatorial Elliptical Orbit. , 2022 3rd URSI Atlantic and Asia Pacific Radio Science Meeting (AT-AP-RASC), 29 May - 4 June 2022, Gran Canaria, Spain, DOI: 10.23919/AT-AP-RASC54737.2022.9814192.
    Identifiers
    uri: https://orfeo.belnet.be/handle/internal/10015
    doi: http://dx.doi.org/10.23919/AT-AP-RASC54737.2022.9814192
    scopus:
    Type
    Conference
    Peer-Review
    No
    Language
    eng
    Links
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