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| Titel |
A new method to reconstruct the ionospheric convection patterns in the polar cap |
| VerfasserIn |
P. L. Israelevich, A. I. Ershkovich |
| 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. 6 ; Nr. 17, no. 6, S.743-748 |
| Datensatznummer |
250013772
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| Publikation (Nr.) |
 copernicus.org/angeo-17-743-1999.pdf |
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| Zusammenfassung |
A new method to reconstruct the instantaneous
convection pattern in the Earth's polar ionosphere is suggested. Plasma
convection in the polar cap ionosphere is described as a hydrodynamic
incompressible flow. This description is valid in the region where the electric
currents are field aligned (and hence, the Lorentz body force vanishes). The
problem becomes two-dimensional, and may be described by means of stream
function. The flow pattern may be found as a solution of the boundary value
problem for stream function. Boundary conditions should be provided by
measurements of the electric field or plasma velocity vectors along the
satellite orbits. It is shown that the convection pattern may be reconstructed
with a reasonable accuracy by means of this method, by using only the minimum
number of satellite crossings of the polar cap. The method enables us to obtain
a reasonable estimate of the convection pattern without knowledge of the
ionospheric conductivity.
Key words. Ionosphere (modelling and forecasting;
plasma convection; polar ionosphere) |
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