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| Titel |
The synthesis of travelling ionospheric disturbance (TID) signatures in HF radar observations using ray tracing |
| VerfasserIn |
A. J. Stocker, N. F. Arnold, T. B. Jones |
| 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 ; 18, no. 1 ; Nr. 18, no. 1, S.56-64 |
| Datensatznummer |
250013881
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| Publikation (Nr.) |
 copernicus.org/angeo-18-56-2000.pdf |
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| Zusammenfassung |
Characteristic signatures are often observed
in HF radar range-time-intensity plots when travelling ionospheric disturbances
(TIDs) are present. These signatures, in particular the variation of the
F-region skip distance, have been synthesised using a ray tracing model. The
magnitude of the skip variation is found to be a function of the peak electron
density perturbation associated with the TID and radar frequency. Examination of
experimental observations leads to an estimate of the peak electron density
perturbation amplitude of around 25% for those TIDs observed by the CUTLASS
radar system. The advantage of using the skip variation over the radar return
amplitude as an indicator of density perturbation is also discussed. An example
of a dual radar frequency experiment has been given. The investigation of the
effect of radar frequency on the observations will aid the optimisation of
future experiments..
Key words. Ionosphere (auroral ionosphere; ionosphere
-atmosphere interactions; ionospheric disturbances) |
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