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| Titel |
Potential merits for substorm research from imaging of charge-exchange neutral atoms |
| VerfasserIn |
I. A. Daglis, S. Livi |
| 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 ; 13, no. 5 ; Nr. 13, no. 5, S.505-516 |
| Datensatznummer |
250011848
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| Publikation (Nr.) |
 copernicus.org/angeo-13-505-1995.pdf |
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| Zusammenfassung |
| The in situ observations of the Earth
magnetosphere performed over the past decades of space research have provided a
rather good understanding of many partial localized processes of the
magnetospheric substorm. The continuing lack of global observations inhibits the
construction of a coherent picture of the substorm as a whole, which is actually
determined by the coupling of the partial processes. In this context the
importance of global observations for the advancement of magnetospheric substorm
studies is critical. This paper presents briefly a promising technique of global
observations, namely the imaging of charge exchange neutral atoms, or neutral
atom imaging (NAI) of the magnetosphere. Model and theoretical estimates of
charge-exchange neutral atom fluxes, as well as appropriate spacecraft orbit and
instrumentation requirements are presented and discussed for specific regions of
interest and vantage points. The potential merits of NAI for substorm research
are presented along with possible combinations with other types of observational
methods. Substorm issues that would benefit from NAI should include among others
the assessment of the ionospheric contribution to the hot magnetospheric plasma,
the relative importance of various ionospheric ion source regions, the
resolution of spatial and temporal characteristics of substorm ion injections.
NAI observations can be precious complements to local observations and lead to
the understanding of how local processes, many of which are resolved quite well
today, combine to form the global process of the magnetospheric substorm. |
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