First Observations in the Magnetosheath Obtained with the STAFF Experiment Aboard CLUSTER

Details First Observations in the Magnetosheath Obtained with the STAFF Experiment Aboard CLUSTER First Observations in the Magnetosheath Obtained with the STAFF Experiment Aboard CLUSTER

May 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001agusm..sm21b08m&link_type=abstract

American Geophysical Union, Spring Meeting 2001, abstract #SM21B-08

Physics

2728 Magnetosheath, 2772 Plasma Waves And Instabilities

Scientific paper

We present the first observations in the Magnetosheath obtained with the STAFF spectrum analyzer (SA) aboard CLUSTER. STAFF-SA calculates, in near real time, the complete auto and cross spectral matrices using the three magnetic and two electric components of the e.m. field. This allows to characterize the full wave properties of the lion roars observed in the Magnetosheath. More precisely, we study the polarization and direction of propagation of these whistler waves, which give some indication about their source regions generally related to mirror modes structures observed in the same region. We present also observations of magnetic and electric turbulence in the dusk region of the Magnetosheath over a wide range oftemporal scales ranging from few hours to 2 10-4 seconds. We analyze the properties of this turbulence for different configurations of the interplanetary magnetic field. We compare also this turbulence with the one observed in the free solar wind.

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