Journal cover Journal topic
Annales Geophysicae An interactive open-access journal of the European Geosciences Union
Journal topic

Journal metrics

Journal metrics

  • IF value: 1.585 IF 1.585
  • IF 5-year value: 1.698 IF 5-year
    1.698
  • CiteScore value: 1.62 CiteScore
    1.62
  • SNIP value: 0.820 SNIP 0.820
  • IPP value: 1.52 IPP 1.52
  • SJR value: 0.781 SJR 0.781
  • Scimago H <br class='hide-on-tablet hide-on-mobile'>index value: 83 Scimago H
    index 83
  • h5-index value: 24 h5-index 24
Volume 22, issue 12
Ann. Geophys., 22, 4185–4196, 2004
https://doi.org/10.5194/angeo-22-4185-2004
© Author(s) 2004. This work is distributed under
the Creative Commons Attribution 3.0 License.
Ann. Geophys., 22, 4185–4196, 2004
https://doi.org/10.5194/angeo-22-4185-2004
© Author(s) 2004. This work is distributed under
the Creative Commons Attribution 3.0 License.

  22 Dec 2004

22 Dec 2004

Local wavelet correlation: applicationto timing analysis of multi-satellite CLUSTER data

J. Soucek1,2, T. Dudok de Wit2, M. Dunlop3, and P. Décréau2 J. Soucek et al.
  • 1Institute of Atmospheric Physics, Prague, Czech Republic
  • 2LPCE, CNRS and University of Orléans, 3A, avenue de la Recherche Scientifique, F–45071 Orléans cedex 2, France
  • 3Space Science and Technology Department, CCLRC Rutherford Appleton Laboratory, Chilton, Oxfordshire OX11 0QX, UK

Abstract. 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)

Publications Copernicus
Download
Citation