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| Titel |
Characteristics of equatorial ionization anomaly (EIA) in relation to transionospheric satellite links around the northern crest in the Indian longitude sector |
| VerfasserIn |
A. Das, K. S. Paul, S. Halder, K. Basu, A. Paul |
| 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 ; 32, no. 2 ; Nr. 32, no. 2 (2014-02-12), S.91-97 |
| Datensatznummer |
250121023
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| Publikation (Nr.) |
 copernicus.org/angeo-32-91-2014.pdf |
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| Zusammenfassung |
| The poleward gradient of the equatorial ionization anomaly (EIA) introduces
more intense propagation effects on transionospheric satellite links in
comparison to the equatorward gradient. Characterization of the poleward
gradient was performed during March–April, August–October 2011 and
March–April 2012 using GPS total electron content (TEC) recorded from a chain of stations located
more or less along the same meridian (88.5° E) at Calcutta,
Baharampore, Farakka and Siliguri. The poleward gradients calculated on
magnetically quiet days at elevation in excess of 50° at 14:00,
15:00 and 16:00 LT were found to have a strong correlation with GPS S4
observed from Calcutta during post-sunset-to-midnight hours. A threshold
value of poleward TEC gradient is calculated above which there is a
probability of scintillation at Calcutta with S4 ≥ 0.4. |
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