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| Titel |
Enhanced EISCAT UHF backscatter during high-energy auroral electron precipitation |
| VerfasserIn |
N. M. Schlatter, N. Ivchenko, T. Sergienko, B. Gustavsson, B. U. E. Brändström |
| 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 ; 31, no. 10 ; Nr. 31, no. 10 (2013-10-09), S.1681-1687 |
| Datensatznummer |
250086120
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| Publikation (Nr.) |
 copernicus.org/angeo-31-1681-2013.pdf |
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| Zusammenfassung |
| Natural enhancements in the backscattered power of incoherent scatter radars
up to 5 orders of magnitudes above the thermal backscatter are sometimes
observed at high latitudes. Recently observations of enhancements in the
backscattered power including a feature at zero Doppler shift have been
reported. These enhancements are limited in altitude to tens of kilometers.
The zero Doppler shift feature has been interpreted as a signature of
electron density cavitation. Enhanced plasma lines during these observations
have also been reported. We report on the first EISCAT UHF observations of
enhanced backscattered radar power including a zero Doppler shift feature.
The enhancements originated from two distinct and intermittent layers at
about 200 km altitude. The altitude extent of the enhancements, observed
during auroral high-energy electron precipitation, was < 2 km. |
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