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| Titel |
Iterative inversion of global magnetospheric ion distributions using energetic neutral atom (ENA) images recorded by the NUADU/TC2 instrument |
| VerfasserIn |
L. Lu, S. McKenna-Lawlor, S. Barabash, K. Kudela, J. Balaz, I. Strharsky, Z. X. Liu, C. Shen, J. B. Cao, P. C. Brandt, C. L. Tang, I. Dandouras |
| 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 ; 26, no. 6 ; Nr. 26, no. 6 (2008-06-11), S.1641-1652 |
| Datensatznummer |
250016132
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| Publikation (Nr.) |
 copernicus.org/angeo-26-1641-2008.pdf |
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| Zusammenfassung |
| A method has been developed for extracting magnetospheric
ion distributions from Energetic Neutral Atom (ENA) measurements made by the
NUADU instrument on the TC-2 spacecraft. Based on a constrained linear
inversion, this iterative technique is suitable for use in the case of an
ENA image measurement, featuring a sharply peaked spatial distribution. The
method allows for magnetospheric ion distributions to be extracted from a
low-count ENA image recorded over a short integration time (5 min). The
technique is demonstrated through its application to a set of representative
ENA images recorded in energy Channel~2 (hydrogen: 50–81 keV, oxygen:
138–185 keV) of the NUADU instrument during a geomagnetic storm. It is
demonstrated that this inversion method provides a useful tool for
extracting ion distribution information from ENA data that are characterized
by high temporal and spatial resolution. The recovered ENA images obtained
from inverted ion fluxes match most effectively the measurements made at maximum
ENA intensity. |
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