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| Titel |
Combined radar observations of equatorial electrojet irregularities at Jicamarca |
| VerfasserIn |
D. L. Hysell, J. Drexler, E. B. Shume, J. L. Chau, D. E. Scipion, M. Vlasov, R. Cuevas, C. Heinselman |
| 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 ; 25, no. 2 ; Nr. 25, no. 2 (2007-03-08), S.457-473 |
| Datensatznummer |
250015790
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| Publikation (Nr.) |
 copernicus.org/angeo-25-457-2007.pdf |
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| Zusammenfassung |
| Daytime equatorial electrojet plasma irregularities were investigated
using five distinct radar diagnostics at Jicamarca including
range-time-intensity (RTI) mapping, Faraday rotation, radar imaging,
oblique scattering, and multiple-frequency scattering using the new
AMISR prototype UHF radar. Data suggest the existence of plasma density
striations separated by 3–5 km and propagating slowly downward. The
striations may be caused by neutral atmospheric turbulence, and a
possible scenario for their formation is discussed. The Doppler shifts
of type 1 echoes observed at VHF and UHF frequencies are compared and
interpreted in light of a model of Farley Buneman waves based on
kinetic ions and fluid electrons with thermal effects
included. Finally, the up-down and east-west asymmetries evident in
the radar observations are described and quantified. |
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