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| Titel |
Observations of HF-induced instability in the auroral E region |
| VerfasserIn |
N. M. Schlatter, N. Ivchenko, B. Gustavsson, T. Leyser, M. Rietveld |
| 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. 6 ; Nr. 31, no. 6 (2013-06-21), S.1103-1108 |
| Datensatznummer |
250019054
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| Publikation (Nr.) |
 copernicus.org/angeo-31-1103-2013.pdf |
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| Zusammenfassung |
| Enhancements were observed in backscattered radar power during an ionospheric heating
experiment from two distinct altitude regions in the auroral E region above
Tromsø. For the experiment the EISCAT Tromsø heater was
operated with O mode and X mode alternated at 4.04 MHz, close to
the 3rd electron gyroharmonic. Ion-line data recorded with the EISCAT UHF
radar reveal different temporal evolutions as well as different ion-line
characteristics for the enhancements from the two altitude regions. The upper
layer is dominated by a strong central feature, whereas the lower layer has
three peaks corresponding to the central feature and the two ion lines. The
altitude region of the two closely spaced (altitude separation ~
5 km) but distinct enhancements is close to the critical altitude
for the heater wave. |
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