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| Titel |
Extrapolating EISCAT Pedersen conductances to other parts of the sky using ground-based TV auroral images |
| VerfasserIn |
M. J. Kosch, T. Hagfors, K. Schlegel |
| 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 ; 16, no. 5 ; Nr. 16, no. 5, S.583-588 |
| Datensatznummer |
250013278
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| Publikation (Nr.) |
 copernicus.org/angeo-16-583-1998.pdf |
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| Zusammenfassung |
Ionospheric conductivity is not very easily
measured directly. Incoherent scatter radars perhaps offer the best method but
can only measure at one point in the sky at any one time and are limited in
their time resolution. Statistical models of average conductivity are available
but these may not be applied to individual case studies such as substorms. There
are many instances where a real-time estimate of ionospheric conductivity over a
large field-of-view is highly desirable at a high temporal and spatial
resolution. We show that it is possible to make a reasonable estimate of the
noctural height-integrated Pedersen conductivity, or conductance, with a single
all-sky TV camera operating at 557.7 nm. This is not so in the case of the Hall
conductance where at least two auroral wavelengths should be imaged in order to
estimate additionally the energy of the precipitating particles.
Key words. Atmospheric composition and structure
(airglow and aurora) · Magnetospheric physics (auroral phenomena · instruments
and techniques) |
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