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| Titel |
Propagation of Spread F at low-latitude ionosphere from multi-point Doppler sounding |
| VerfasserIn |
Jaroslav Chum, Miguel Cabrera, Jann-Yenq Liu, Jiří Baše, Fernando Bonomi, Jiri Fiser, František Hruška, Jan Lastovicka |
| Konferenz |
EGU General Assembly 2015
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 17 (2015) |
| Datensatznummer |
250104138
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| Publikation (Nr.) |
 EGU/EGU2015-3563.pdf |
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| Zusammenfassung |
| Propagation velocities and directions of spread F structures estimated from measurements by multipoint continuous Doppler sounding in Tucuman, Northern Argentina, and Taiwan are presented. It is shown that these structures propagate roughly eastward at velocities from ~70 to 180 m/s at both locations during nighttime hours. In Tucuman, most of the events were observed from September to March, i.e. during the local summer half of the year, whereas in Taiwan, the highest occurrence rate was recorded around equinoxes.
The propagation velocities and directions were estimated from the time delays between observations of the corresponding structures on different sounding paths (transmitter-receiver pairs). The velocities were also calculated from tilts in the Doppler shift spectrograms. The latter method made it possible to analyze more events. |
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