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| Titel |
Electrodynamics of the equatorial F-region ionosphere during pre-sunrise period |
| VerfasserIn |
S. R. Prabhakaran Nayar, T. J. Mathew, C. V. Sreehari, S. G. Sumod, C. V. Devasia, S. Ravindran, V. Sreeja, T. Kumar Pant, R. Sridharan |
| 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. 1 ; Nr. 27, no. 1 (2009-01-06), S.107-111 |
| Datensatznummer |
250016359
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| Publikation (Nr.) |
 copernicus.org/angeo-27-107-2009.pdf |
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| Zusammenfassung |
| The electrodynamics of the pre-sunrise equatorial F-region is
investigated using HF Doppler radar and digital ionosonde. The
observations are limited to those days for which the radar probing
frequency is below the foF2 value. The ionosphere observation using
HF Doppler radar exhibit interesting features during pre-sunrise
period similar to the post sunset pre-reversal enhancement. The most
striking feature observed during pre-sunrise period is the sudden
downward excursion in the vertical drift around local sunrise
followed by an upward turning. Pre-sunrise observations of vertical
plasma drift and the sunrise downward excursion followed by an
upward turning after the ground sunrise related to the zonal
electric field at the equatorial F-region are the most significant
results not reported earlier. |
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