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

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

11 Scopus citations

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
StatePublished - 2008

ASJC Scopus subject areas

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

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