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Nonlinear Processes in Geophysics An interactive open-access journal of the European Geosciences Union
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Volume 3, issue 1
Nonlin. Processes Geophys., 3, 58–65, 1996
https://doi.org/10.5194/npg-3-58-1996
© Author(s) 1996. This work is licensed under
the Creative Commons Attribution-NonCommercial-ShareAlike 2.5 License.

Special issue: URSI and STEP/GAPS Workshop

Nonlin. Processes Geophys., 3, 58–65, 1996
https://doi.org/10.5194/npg-3-58-1996
© Author(s) 1996. This work is licensed under
the Creative Commons Attribution-NonCommercial-ShareAlike 2.5 License.

  31 Mar 1996

31 Mar 1996

On aspects of the measurement of non-linear turbulence processes using the cluster wave experiments

L. J. C. Wooliscroft1, T. Dudok de Wit2,3, V. V. Krasnosel'skikh3, and M. A. Balikhin1,3 L. J. C. Wooliscroft et al.
  • 1Department of Automatic Control and Systems Engineering, The University of Sheffield, Sheffield, S1 3JD, UK
  • 2Centre de Physique Theorique, Luminy, case 907, 13288 Marsaille Cedex 9, France
  • 3LPCE-CNRS, 3A Ave. de la Recherche Scientifique, 45071 Orleans Cedex 2, France

Abstract. The ESA/NASA Cluster mission has four identical satellites and is due for launch at the end of 1995. It will provide a unique opportunity to study medium scale processes in the region from inside the magnetopause to the solar wind. The polar orbit will allow measurements in the cusp and along auroral field lines, both regions where turbulence is to be expected. Five of the eleven instruments on each payload form the Wave Experiment Consortium (WEC); EFW, STAFF, VMISPER, WBD and DWP. The WEC is capable of a wide variety of wave and turbulence measurements. This paper outlines these capabilities and describes the form of the data which will be collected.
The paper gives a discussion of how the WEC data may be analysed so as to give an insight into the non-linear processes which occur in these regions of the space plasmas. There are many ways in which a plasma may be considered to behave in a non-linear manner. We concentrate on how the spatio-temporal turbulence in the plasma may be investigated so as to yield the energy spectrum with respect to both the frequency and wave number.

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