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Journal Articles Annales Geophysicae Year : 2008

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

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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.
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insu-02872008 , version 1 (17-06-2020)

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Attribution - NonCommercial - CC BY 4.0

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Y. Narita, K.H. Glassmeier, Pierrette Décréau, T. Hada, U. Motschmann, et al.. Evaluation of bispectrum in the wave number domain based on multi-point measurements. Annales Geophysicae, 2008, 26 (11), pp.3389-3393. ⟨10.5194/angeo-26-3389-2008⟩. ⟨insu-02872008⟩
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