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| Titel |
Spatial structure of auroral day-time ionospheric electron density irregularities generated by a powerful HF-wave |
| VerfasserIn |
E. D. Tereshchenko, B. Z. Khudukon, M. T. Rietveld, A. Brekke |
| 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 ; 16, no. 7 ; Nr. 16, no. 7, S.812-820 |
| Datensatznummer |
250013341
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| Publikation (Nr.) |
 copernicus.org/angeo-16-812-1998.pdf |
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| Zusammenfassung |
We describe an experiment in satellite
radio-wave probing of the ionosphere, modified by powerful waves from the HF
heating facility at Tromsø (Norway) in May 1995. Amplitude scintillations and
variations of the phase of VHF signals from Russian navigational satellites
passing over the heated region were observed. We show that both large-scale
electron density irregularities (several tens of kilometers in size) and
small-scale ones (from hundreds of meters to kilometers) can be generated by the
HF radiation. Maximum effects caused by small-scale irregularities detected in
the satellite signals are observed in the directions sector approximately
parallel to the geomagnetic field lines although large-scale structures can be
detected within a much larger area. The properties of small-scale irregularities
(electron density fluctuations) are investigated by applying a statistical
analysis and by studying experimental and model mean values of the logarithm of
the relative amplitude of the signal. The results indicate that satellite radio
probing can be a supporting diagnostic technique for ionospheric heating and add
valuable information to studies of effects produced by HF modification.
Key words. Satellite radio-wave probing · HF radiation
· Electron density irregularities · Statistical analysis · Ionospheric
heating |
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