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

Y. Narita; K. H. Glassmeier; P. M.E. Dãcrãau; T. Hada; U. Motschmann; Y. Nariyuki

doi:10.5194/angeo-26-3389-2008

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

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

Research output: Contribution to journal › Article › peer-review

11 Citations (Scopus)

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 language	English
Pages (from-to)	3389-3393
Number of pages	5
Journal	Annales Geophysicae
Volume	26
Issue number	11
DOIs	https://doi.org/10.5194/angeo-26-3389-2008
Publication status	Published - 2008

All Science Journal Classification (ASJC) codes

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

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10.5194/angeo-26-3389-2008

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AU - Glassmeier, K. H.

AU - Dãcrãau, P. M.E.

AU - Hada, T.

AU - Motschmann, U.

AU - Nariyuki, Y.

PY - 2008

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

Abstract

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