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| Titel |
Spectra of equatorial total electron content derived from GPS signals |
| VerfasserIn |
M. M. J. L. Kamp, P. S. Cannon |
| 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 ; 27, no. 5 ; Nr. 27, no. 5 (2009-05-15), S.2205-2214 |
| Datensatznummer |
250016537
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| Publikation (Nr.) |
 copernicus.org/angeo-27-2205-2009.pdf |
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| Zusammenfassung |
| High cadence GPS TEC signals collected on Ascension Island, South Atlantic
Ocean, during sunspot minimum, and in Vanimo, Papua New Guinea, over half a
solar cycle, have been analysed for their spectral properties. A new
parameter Tk has been introduced to quantify the strength of TEC
irregularities at a scale size of 1 km. The scintillation strength and the
spectral index have been analysed as functions of each other, and of local
time, season, location and sunspot number. The scintillation strength is
highest in autumn and spring in both locations, although the quietest period
is summer in Ascension and winter in Vanimo. The scintillation strength
decreases with decreasing sunspot number, but is consistently lower in
Vanimo than in Ascension. The spectral index decreases with scintillation
strength, and increases during the hours of the evening. A method is
developed to estimate Tk from the large data base of S4
measurements. |
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