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| Titel |
Swarm Equatorial Electric Field Inversion Chain |
| VerfasserIn |
Patrick Alken, Stefan Maus, Pierre Vigneron, Olivier Sirol, Gauthier Hulot |
| Konferenz |
EGU General Assembly 2014
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 16 (2014) |
| Datensatznummer |
250090081
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| Publikation (Nr.) |
 EGU/EGU2014-4297.pdf |
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| Zusammenfassung |
| The day-time eastward equatorial electric field (EEF) in the ionospheric
E-region plays a crucial role in equatorial ionospheric dynamics. It is
responsible for driving the equatorial electrojet (EEJ) current system,
equatorial vertical ion drifts, and the equatorial ionization anomaly (EIA).
Due to its importance, there is much interest in accurately
measuring and modeling the EEF for both climatological and near real-time
studies. The Swarm satellite mission offers a unique opportunity to
estimate the equatorial electric field from measurements of the
geomagnetic field. Due to the near-polar orbits of each satellite,
the on-board magnetometers record a full profile in latitude of the
ionospheric current signatures at satellite altitude. These latitudinal
magnetic profiles are then modeled using a first principles approach
with empirical climatological inputs specifying the state of the
ionosphere, in order to recover the EEF. We will present preliminary
estimates of the EEF using the first Swarm geomagnetic field
measurements, and compare them with independently measured
electric fields from the JULIA ground-based radar in Peru. |
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