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| Titel |
Directional features of the downshifted peak observed in HF-induced stimulated electromagnetic emission spectra obtained using an interferometer |
| VerfasserIn |
E. D. Tereshchenko, R. Yu. Yurik, B. Z. Khudukon, M. T. Rietveld, B. Isham, V. Belyey, A. Brekke, T. Hagfors, M. Grill |
| 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 ; 24, no. 7 ; Nr. 24, no. 7 (2006-08-09), S.1819-1827 |
| Datensatznummer |
250015590
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| Publikation (Nr.) |
 copernicus.org/angeo-24-1819-2006.pdf |
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| Zusammenfassung |
| A high frequency (HF) ionospheric modification experiment was carried out
between 25 September and 8 October 2004, using the EISCAT HF transmitter
located near Tromsø, Norway. During this experiment the spectra of the
stimulated HF sideband waves (stimulated electromagnetic emission or SEE)
induced by the HF pump were observed using an interferometer consisting of
three spaced receiving antennas with baselines both along and perpendicular
to the meridian, and a multi-channel coherent receiver, installed in the
vicinity of the HF facility. The transmitter operated at 4040kHz and its
antenna beam was scanned to angles of 0°, 7°, 14°, and 21°
south from vertical, pausing 4min at each position. This paper focuses on
features of the downshifted peak (DP) emission, which has not been as
thoroughly studied as many of the other SEE spectral features observable
within the EISCAT pump frequency range. It was found that the
signal-weighted direction of the DP source region remained within 5° of
magnetic zenith as the HF beam was tilted between 0 and 21° south of vertical. |
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