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| Titel |
A comparison of satellite scintillation measurements with HF radar backscatter characteristics |
| VerfasserIn |
S. E. Milan, S. Basu, T. K. Yeoman, R. E. Sheehan |
| 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. 11 ; Nr. 23, no. 11 (2005-12-21), S.3451-3455 |
| Datensatznummer |
250015414
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| Publikation (Nr.) |
 copernicus.org/angeo-23-3451-2005.pdf |
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| Zusammenfassung |
| We examine the correspondence between high latitude
ionospheric scintillation measurements made at 250MHz with the occurrence
of 10MHz HF coherent radar backscatter, on 13 and 14 December 2002. We
demonstrate that when the ionospheric intersection point of the
scintillation measurements is co-located with significant HF radar
backscatter, the observed scintillation, quantified by the S4 index, is
elevated. Conversely, when the radar indicates that backscatter is observed
away from the intersection point due to movements of the auroral zone, the
observed scintillation is low. This suggests that scintillation is highly
location-dependent, being enhanced in the auroral zone and being lower at
sub-auroral latitudes. The coexistence of scintillation and HF radar
backscatter, produced by ionospheric density perturbations with scale sizes
of 100s of metres and ~15 m, respectively, suggests that a broad spectrum
of density fluctuations is found in the auroral zone. |
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