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| Titel |
The climatology of ionospheric plasma bubbles and irregularities over Brazil |
| VerfasserIn |
F. D. Chu, J. Y. Liu, H. Takahashi, J. H. A. Sobral, M. J. Taylor, A. F. Medeiros |
| 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 ; 23, no. 2 ; Nr. 23, no. 2 (2005-02-28), S.379-384 |
| Datensatznummer |
250015145
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| Publikation (Nr.) |
 copernicus.org/angeo-23-379-2005.pdf |
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| Zusammenfassung |
| In this paper, we examine ionospheric plasma depletions (or
bubbles) and irregularities observed by photometers and a ground-based
receiver of the global positioning system (GPS) both located in Brazil,
South America. A simultaneous observation reveals that when the ionospheric
plasma becomes depleted, the GPS total electron content decreases and the
associated phase fluctuations grow. Statistical results show that the plasma
bubbles and the significant GPS phase fluctuations generally occur during
October-March. The solar activity variation is not obvious in either
observation except during the equinoctial months. The GPS phase fluctuations
suggest that the most pronounced ionospheric irregularities appear between 20:00 and
01:00 LT, which generally agree with previous ionospheric bubble
observations. |
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