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    Observation of High‐Energy Electrons Precipitated by NWC Transmitter From PROBA‐V Low‐Earth Orbit Satellite

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    Authors
    Cunningham, G.S.
    Botek, E.
    Pierrard, V.
    Cully, C.
    Ripoll, J.‐F.
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    Discipline
    Physical sciences
    Subject
    inner radiation belt
    ground‐based transmitter
    NWC
    PROBA‐V EPT
    pitch‐angle scattering
    drift loss cone
    Audience
    Scientific
    Date
    2020
    Metadata
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    Description
    The very low‐frequency transmitter in the Northwest Cape of Australia (NWC) has previously been observed to pitch‐angle scatter electrons with energies from 30–400 keV, creating enhanced fluxes measured by low‐Earth orbiting (LEO) satellites. Here we use observations from the Energetic Particle Telescope on PROBA‐V. We compare the measured flux, as a function of local magnetic field strength, when the NWC transmitter is “on” versus “off,” and find enhanced fluxes only when NWC is “on” and located on the nightside. The enhanced fluxes occur in the population gradually transitioning from “permanently trapped” to “quasi‐trapped.” We show that electrons up to 800 keV, substantially higher energy than previously studied, are scattered by resonant interactions with NWC to produce enhanced fluxes. The enhanced fluxes appear at multiple L‐shells for each energy channel, consistent with resonance conditions at distinct wave normal angles, that indicate ducted interactions at L < 1.55 and unducted interactions at L > 1.65.
    Citation
    Cunningham, G.S.; Botek, E.; Pierrard, V.; Cully, C.; Ripoll, J.‐F. (2020). Observation of High‐Energy Electrons Precipitated by NWC Transmitter From PROBA‐V Low‐Earth Orbit Satellite. , Geophysical Research Letters, Vol. 47, Issue 16, e2020GL089077, DOI: 10.1029/2020GL089077.
    Identifiers
    uri: https://orfeo.belnet.be/handle/internal/7578
    doi: http://dx.doi.org/10.1029/2020GL089077
    Type
    Article
    Peer-Review
    Yes
    Language
    eng
    Links
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