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"The Whisper experiment on-board the Cluster mission: multipoint observations on density and wave structures"

Prof. Pierrette DECREAU (Orlean University)   

Abstract:

In operation on-board the four spacecraft of the Cluster mission, the Whisper instrument is a sounder and wave analyser, dealing with electric field fluctuations in the 2 - 80 kHz range.

In a first part, will by present the instrument: functioning, quantity measured, performances, typical observations.

In a second part, will be present wave observations in various regions of the magnetosphere, and indicate a few directions of ongoing studies or considered
directions for future ones.

In a third part, will be discussed density structures. It will be shortly describe four points analysis tools which can help us separating spatial features from temporal ones, and show an illustration. In the end, it will be present observations of the behaviour of density irregularities at the plasmapause.