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| Titel |
Investigation of the response time of the equatorial ionosphere in context of the equatorial electrojet and equatorial ionization anomaly |
| VerfasserIn |
L. Jose, S. Ravindran, C. Vineeth, T. K. Pant, S. Alex |
| 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 ; 29, no. 7 ; Nr. 29, no. 7 (2011-07-19), S.1267-1275 |
| Datensatznummer |
250017061
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| Publikation (Nr.) |
 copernicus.org/angeo-29-1267-2011.pdf |
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| Zusammenfassung |
| Equatorial Electrojet (EEJ) and Equatorial Ionization Anomaly (EIA) are two
large-scale processes in the equatorial/low latitude ionosphere, driven
primarily by the eastward electric field during daytime. In the present
paper we investigate the correlation between the Integrated EEJ strength
(IEEJ) and the EIA parameters like the total electron content at the
northern crest, location of crest in Magnetic latitude and strength of the
EIA for the Indian sector. A good correlation has been observed between the
IEEJ and EIA when a time delay is introduced between IEEJ and EIA parameters. This time
delay is regarded as the response time of equatorial ionosphere in context
of the evolution of EIA vis-à-vis EEJ. Further, a seasonal variation in
the time delay has been observed, which is believed to be due to changes in
thermospheric wind. Using the response time and the linear relationship
obtained, the possibility of near-real time prediction of EIA parameters has
been attempted and found that the prediction holds well during the
geomagnetically quiet periods. The paper discusses these aspects in detail. |
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