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| Titel |
Characteristic properties of Nu whistlers as inferred from observations and numerical modelling |
| VerfasserIn |
D. R. Shklyar, J. Chum, F. Jiricek |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
0992-7689
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| Digitales Dokument |
URL |
| Erschienen |
In: Annales Geophysicae ; 22, no. 10 ; Nr. 22, no. 10 (2004-11-03), S.3589-3606 |
| Datensatznummer |
250015034
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| Publikation (Nr.) |
 copernicus.org/angeo-22-3589-2004.pdf |
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| Zusammenfassung |
| The properties of Nu whistlers are discussed in the light of observations
by the MAGION 5 satellite, and of numerically simulated spectrograms of
lightning-induced VLF emissions. The method of
simulation is described in full. With the information
from this numerical modelling, we distinguish the characteristics of the
spectrograms that depend on the site of the lightning strokes from those
that are determined mainly by the position of the satellite.
Also, we identify the region in the magnetosphere where Nu whistlers
are observed most often, and the geomagnetic conditions favouring their
appearance. The relation between magnetospherically reflected (MR)
whistlers and Nu whistlers is demonstrated by the gradual transformation
of MR whistlers into Nu whistlers as the satellite moves from
the high-altitude equatorial region to lower altitudes and higher latitudes.
The magnetospheric reflection of nonducted whistler-mode waves,
which is of decisive importance in the formation
of Nu whistlers, is discussed in detail. |
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