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| Titel |
Temporal and spatial variations in ionospheric electron density profiles over South Africa during strong magnetic storms |
| VerfasserIn |
Y. B. Yao, P. Chen, S. Zhang, J. J. Chen |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1561-8633
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| Digitales Dokument |
URL |
| Erschienen |
In: Natural Hazards and Earth System Science ; 13, no. 2 ; Nr. 13, no. 2 (2013-02-15), S.375-384 |
| Datensatznummer |
250017574
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| Publikation (Nr.) |
 copernicus.org/nhess-13-375-2013.pdf |
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| Zusammenfassung |
| Observations from the South African TrigNet global
navigation satellite system
(GNSS) and vertical total electron content (VTEC) data from the Jason-1
satellite were used to analyze the variations in ionospheric electron
density profiles over South Africa before and after the severe geomagnetic
storms on 15 May 2005. Computerized ionospheric tomography (CIT) was used to
inverse the 3-D structure of ionospheric electron density and its response to
the magnetic storms. Inversion results showed that electron density
significantly increased at 10:00 UT, 15 May compared with that at the same
period on 14 May. Positive ionospheric storms were observed in the inversion
region during the magnetic storms. Jason-1 data show that the VTEC observed
on descending orbits on 15 May significantly increased, whereas that on
ascending orbits only minimally changed. This finding is identical to the
CIT result. |
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