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| Titel |
Local wavelet correlation: applicationto timing analysis of multi-satellite CLUSTER data |
| VerfasserIn |
J. Soucek, T. Dudok de Wit, M. Dunlop, P. Décréau |
| 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 ; 22, no. 12 ; Nr. 22, no. 12 (2004-12-22), S.4185-4196 |
| Datensatznummer |
250015083
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| Publikation (Nr.) |
 copernicus.org/angeo-22-4185-2004.pdf |
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| Zusammenfassung |
Multi-spacecraft space observations, such as those of CLUSTER,
can be used to infer information about local plasma structures by exploiting
the timing differences between subsequent encounters of these structures
by individual satellites. We introduce a novel wavelet-based technique,
the Local Wavelet Correlation (LWC), which allows one to match the corresponding
signatures of large-scale structures in the data from multiple spacecraft and
determine the relative time shifts between the crossings.
The LWC is especially suitable for analysis of strongly
non-stationary time series, where it enables one to estimate the time lags
in a more robust and systematic way than ordinary cross-correlation
techniques. The technique, together with its properties and
some examples of its application to timing analysis of bow shock and
magnetopause crossing observed by CLUSTER, are presented. We also compare
the performance and reliability of the technique with classical discontinuity
analysis methods.
Key words. Radio science (signal processing) – Space
plasma physics (discontinuities; instruments and techniques) |
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