Long Term Monitoring of the Io Plasma Torus During the Galileo Encounter

Details Long Term Monitoring of the Io Plasma Torus During the Galileo Encounter Long Term Monitoring of the Io Plasma Torus During the Galileo Encounter

Jan 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002stin...0230023b&link_type=abstract

Technical Report, California Inst. of Tech. Pasadena, CA United States Div. of Geological and Planetary Sciences

Mathematics

Logic

In Situ Measurement, Io, Planetary Magnetic Fields, Plasma Density, Toroidal Plasmas, Temperature Measurement, Density Measurement, Galileo Spacecraft, Jupiter (Planet)

Scientific paper

In the fall of 1999, the Galileo spacecraft made four passes into the Io plasma torus, obtaining the best in situ measurements ever of the particle and field environment in this densest region of the Jovian magnetosphere. Supporting observations from the ground are vital for understanding the global and temporal context of the in situ observations. We conducted a three-month-long Io plasma torus monitoring campaign centered on the time of the Galileo plasma torus passes to support this aspect of the Galileo mission. The almost-daily plasma density and temperature measurements obtained from our campaign allow the much more sparse but also much more detailed Galileo data to be used to address the issues of the structure of the Io plasma torus, the stability mechanism of the Jovian magnetosphere, the transport of material from the source region near Io, and the nature and source of persistent longitudinal variations. Combining the ground-based monitoring data with the detailed in situ data offers the only possibility for answering some of the most fundamental questions about the nature of the Io plasma torus.

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