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| Titel |
Detection of whistlers by the Belgian VLF antenna : Statistical analysis and comparison with Cluster data |
| VerfasserIn |
Fabien Darrouzet, Sylvain Ranvier, Johan De Keyser, Hervé Lamy, János Lichtenberger, Pierrette Decreau |
| Konferenz |
EGU General Assembly 2013
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 15 (2013) |
| Datensatznummer |
250079665
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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 early 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 retrieve automatically
electron density profiles from whistler measurements made in Belgium. In this poster,
the first results of whistler occurrence are shown, as well as the first comparison
with density measurements made with the WHISPER instrument onboard Cluster. |
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