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| Titel |
Detection of whistlers by the Belgian VLF antenna : Statistical analysis and comparison with Cluster data and a plasmaspheric model |
| VerfasserIn |
Fabien Darrouzet, Sylvain Ranvier, Johan De Keyser, Hervé Lamy, Viviane Pierrard, Kris Borremans, Pierrette Decreau, János Lichtenberger |
| 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 |
250098078
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| Publikation (Nr.) |
 EGU/EGU2014-13719.pdf |
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| Zusammenfassung |
| Whistlers are VLF (3-30 kHz) emissions initiated by lightning, propagating along magnetic
field lines, observed on ground and in space. Whistler wave analysis is an effective tool for
studying the plasmasphere. Whistlers acquire particular frequency-time characteristics while
they propagate through the magnetospheric plasma, and in particular through the
plasmasphere. Their propagation time depends on the plasma density along their propagation
paths. It is possible to derive the plasmaspheric electron density distribution from these
propagation times. We therefore have started a project to detect whistlers with VLF
measurements.
A VLF antenna has been installed in 2011 in Humain, Belgium (50.11°N, 5.15°E). The
VLF antenna is made of two perpendicular magnetic loops, oriented North-South and
East-West, and with an area of approximately 50 m2 each. This antenna is part of AWDAnet,
the Automatic Whistler Detector and Analyzer system’s network. This network covers low,
mid and high magnetic latitudes, including conjugate locations. We use the AWDA system to
automatically retrieve electron density profiles from whistler measurements made in
Belgium.
On this poster, results of whistler occurrence are shown, as well as a comparison with
density data obtained from the WHISPER instrument onboard Cluster and from a
plasmaspheric model. We also present the possibilities to install a similar VLF antenna at the
Belgian Antarctica station. |
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