Evaluation of bispectrum in the wave number domain based on multi-point measurements

Y. Narita, K. H. Glassmeier, P. M.E. Dãcrãau, Tohru Hada, U. Motschmann, Y. Nariyuki

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    Abstract

    We present an estimator of the bispectrum, a measure of three-wave couplings. It is evaluated directly in the wave number domain using a limited number of detectors. The ability of the bispectrum estimator is examined numerically and then it is applied to fluctuations of magnetic field and electron density in the terrestrial foreshock region observed by the four Cluster spacecraft, which indicates the presence of a three-wave coupling in space plasma.

    Original languageEnglish
    Pages (from-to)3389-3393
    Number of pages5
    JournalAnnales Geophysicae
    Volume26
    Issue number11
    DOIs
    Publication statusPublished - Jan 1 2008

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    All Science Journal Classification (ASJC) codes

    • Astronomy and Astrophysics
    • Geology
    • Atmospheric Science
    • Earth and Planetary Sciences (miscellaneous)
    • Space and Planetary Science

    Cite this

    Narita, Y., Glassmeier, K. H., Dãcrãau, P. M. E., Hada, T., Motschmann, U., & Nariyuki, Y. (2008). Evaluation of bispectrum in the wave number domain based on multi-point measurements. Annales Geophysicae, 26(11), 3389-3393. https://doi.org/10.5194/angeo-26-3389-2008