Evaluation of bispectrum in the wave number domain based on multi-point measurements
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 ele...
| Main Authors: | , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Copernicus Publications
2008-10-01
|
| Series: | Annales Geophysicae |
| Online Access: | https://www.ann-geophys.net/26/3389/2008/angeo-26-3389-2008.pdf |
| Summary: | 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. |
|---|---|
| ISSN: | 0992-7689 1432-0576 |