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| Titel |
Comparison of plasma data from ASPERA-3/Mars-Express with a 3-D hybrid simulation |
| VerfasserIn |
A. Bößwetter, S. Simon, T. Bagdonat, U. Motschmann, M. Franz, E. Roussos, N. Krupp, J. Woch, J. Schüle, S. Barabash, R. Lundin |
| 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 ; 25, no. 8 ; Nr. 25, no. 8 (2007-08-29), S.1851-1864 |
| Datensatznummer |
250015901
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| Publikation (Nr.) |
 copernicus.org/angeo-25-1851-2007.pdf |
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| Zusammenfassung |
| The ELS and IMA sensors of the ASPERA-3 experiment onboard of Mars-Express
(MEX) can measure electron as well as ion moments. We compare these
measurements for a specific orbit with the simulation results from a 3-D
hybrid model. In the hybrid approximation the electrons are modeled as a
massless charge-neutralizing fluid, whereas the ions are treated as
individual particles. This approach allows gyroradius effects to be included
in our model calculations of the Martian plasma environment because the
gyroradii of the solar wind protons are in the range of several hundred
kilometers and therefore comparable with the characteristic scales of the
subsolar ionospheric interaction region. The position of both the bow shock
and the Ion Composition Boundary (ICB) manifest in the MEX data as well as
in the results from the hybrid simulation nearly at the same location. The
characteristic features of these boundaries, i.e. an increase of proton
density and temperature at the Bow Shock and a transition from solar wind to
ionospheric particles at the ICB, are clearly identifiable in the data. |
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