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    Dynamics of Megaelectron Volt Electrons Observed in the Inner Belt by PROBA‐V/EPT

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    Authors
    Pierrard, V.
    Lopez Rosson, G.
    Botek, E.
    Discipline
    Physical sciences
    Subject
    radiation belts
    relativistic electrons
    geomagnetic storms
    energetic particles
    Audience
    Scientific
    Date
    2019
    Metadata
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    Description
    Using the observations of the EPT (Energetic Particle Telescope) onboard the satellite PROBA‐V, we study the dynamics of inner and outer belt electrons from 500 keV to 8 MeV during quiet periods and geomagnetic storms. This high time‐resolution (2‐s) spectrometer operating at the altitude of 820 km on a low polar orbit is providing continuously valuable electrons fluxes for already 5 years. We emphasize especially that some megaeleactron volt electrons are observed in low quantities in the inner belt, even during periods when they are not observed by Van Allen Probes. We show that they are not due to proton contamination but to clear injections of particles from the outer belt during strong geomagnetic storms of March and June 2015, and September 2017. Electrons with lower energy are injected also during less strong storms and the L shell of the electron flux peak in the outer belt shifts inward with a high dependence on the electron energy. With the new high‐resolution EPT instrument, we can study the dynamics of relativistic electrons, including megaelectron volt electrons in the inner radiation belt, revealing how and when such electrons are injected into the inner belt and how long they reside there before being scattered into the Earth's atmosphere or lost by other mechanisms.
    Citation
    Pierrard, V.; Lopez Rosson, G.; Botek, E. (2019). Dynamics of Megaelectron Volt Electrons Observed in the Inner Belt by PROBA‐V/EPT. , Journal of Geophysical Research: Space Physics, Vol. 124, Issue 3, 1651-1659, DOI: 10.1029/2018JA026289.
    Identifiers
    uri: https://orfeo.belnet.be/handle/internal/7228
    doi: http://dx.doi.org/10.1029/2018JA026289
    Type
    Article
    Peer-Review
    Yes
    Language
    eng
    Links
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