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| Titel |
Spatial and temporal variations of small-scale plasma turbulence parameters in the equatorial electrojet: HF and VHF radar observational results |
| VerfasserIn |
G. Manju, K. S. Viswanathan, S. Ravindran |
| 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 ; 23, no. 4 ; Nr. 23, no. 4 (2005-06-03), S.1165-1173 |
| Datensatznummer |
250015212
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| Publikation (Nr.) |
 copernicus.org/angeo-23-1165-2005.pdf |
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| Zusammenfassung |
| The spatial and temporal variations of various parameters associated with
plasma wave turbulence in the equatorial electrojet (EEJ) at the magnetic
equatorial location of Trivandrum (8.5° N, 77° E; dip 0.5° N) are
studied for the first time, using co-located HF (18MHz) and VHF (54.95MHz)
coherent backscatter radar observations (daytime) in the altitude region of
95-110km, mostly on magnetically quiet days. The derived turbulence
parameters are the mean electron density irregularity strength (δn/n),
anomalous electron collision frequency (νe*) and the
corrected east-west electron drift velocity (Vey). The validity of the
derived parameters is confirmed using radar data at two different
frequencies and comparing with in-situ measurements. The behaviour of
δn/n in relation to the backscattered power during weak and strong
EEJ conditions is also examined to understand the growth and evolution of
turbulence in the electrojet. |
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