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| Titel |
Analysis of three-spacecraft data using planar reciprocal vectors: methodological framework and spatial gradient estimation |
| VerfasserIn |
J. Vogt, A. Albert, O. Marghitu |
| 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 ; 27, no. 8 ; Nr. 27, no. 8 (2009-08-19), S.3249-3273 |
| Datensatznummer |
250016629
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| Publikation (Nr.) |
 copernicus.org/angeo-27-3249-2009.pdf |
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| Zusammenfassung |
| In the context of ESA's Cluster mission, four-point array techniques
are widely used to analyze space plasma phenomena such as shocks
and discontinuities, waves and turbulence, and spatial gradients.
Due to failures of single instruments on the Cluster spacecraft fleet,
there is also need for array processing of three-point measurements.
In this paper we identify planar reciprocal vectors as a generic tool for this
purpose. The class of three-point techniques introduced here includes
methods for discontinuity analysis, wave identification, and spatial gradient
determination. Parameter vectors can be resolved fully in the spacecraft plane
but further assumptions or physical constraints have to be specified to estimate
the normal components. We focus on the gradient estimation problem
where we check and illustrate our approach using Cluster measurements. |
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