Disturbance of plasma enviroment in the vicinity of the Astrid-2 microsatellite

Details Disturbance of plasma enviroment in the vicinity of the Astrid-2 microsatellite Disturbance of plasma enviroment in the vicinity of the Astrid-2 microsatellite

Jun 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001angeo..19..655i&link_type=abstract

Annales Geophysicae, vol. 19, Issue 6, pp.655-666

Physics

3

Scientific paper

The presence of a satellite disturbs the ambient plasma. The charging of the spacecraft creates a sheath around it, and the motion of the satellite creates a wake disturbance. This modification of the plasma environment introduces difficulties in measuring electric fields and plasma densities using the probe technique. We present a study of the structure of the sheath and wake around the Astrid-2 microsatellite, as observed by the probes of the EMMA and LINDA instruments. Measurements with biased LINDA probes, as well as current sweeps on the EMMA probes, show a density enhancement upstream of the satellite and a plasma depletion behind the satellite. The electric field probes detect disturbances in the plasma potential on magnetic field lines connected to the satellite.

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