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| Titel |
Statistical observations of the MLT, latitude and size of pulsed ionospheric flows with the CUTLASS Finland radar |
| VerfasserIn |
G. Provan, T. K. Yeoman |
| 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 ; 17, no. 7 ; Nr. 17, no. 7, S.855-867 |
| Datensatznummer |
250013782
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| Publikation (Nr.) |
 copernicus.org/angeo-17-855-1999.pdf |
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| Zusammenfassung |
A study has been performed on the occurrence
of pulsed ionospheric flows as detected by the CUTLASS Finland HF radar. These
flows have been suggested as being created at the ionospheric footprint of
newly-reconnected field lines, during episodes of magnetic flux transfer into
the terrestrial magnetosphere (flux transfer events or FTEs). Two years of both
high-time resolution and normal scan data from the CUTLASS Finland radar have
been analysed in order to perform a statistical study of the extent and location
of the pulsed ionospheric flows. We note a great similarity between the
statistical pattern of the coherent radar observations of pulsed ionospheric
flows and the traditional low-altitude satellite identification of the particle
signature associated with the cusp/cleft region. However, the coherent scatter
radar observations suggest that the merging gap is far wider than that proposed
by the Newell and Meng model. The new model for cusp low-altitude particle
signatures, proposed by Lockwood and Onsager and Lockwood provides a unified
framework to explain the dayside precipitation regimes observed both by the
low-altitude satellites and by coherent scatter radar detection.
Key words. Magnetospheric physics (magnetosphere ·
ionosphere interactions; plasma convection; solar wind-magnetosphere
interactions) |
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