Physics
Scientific paper
Apr 2003
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003eaeja.....7445k&link_type=abstract
EGS - AGU - EUG Joint Assembly, Abstracts from the meeting held in Nice, France, 6 - 11 April 2003, abstract #7445
Physics
Scientific paper
In November 2002 the Galileo spacecraft traversed the region within Io's orbit (5.9 R_J, Jupiter radius R_J =71492 km) for the first time since orbit insertion in December 1995 and had the first ever passage through Jupiter's gossamer ring, approaching the planet to 2 R_J. Several hundred impacts of dust grains were recorded with the in-situ Dust Detector on board the spacecraft during the ring passage. In-situ dust measurements provide information about the physical properties of the dust environment not accessible with imaging techniques. They directly provide dust spatial densities along the spacecraft trajectory as well as grain sizes and impact speeds. The dust environment can be investigated at much lower dust densities than is accessible with imaging techniques. The in-situ measurement of grain sizes and dust densities in different regions of the gossamer ring will allow to better constrain the dust dynamics as well as plasma and energetic particle conditions in the ring. We present the first results from the Galileo dust measurements in Jupiter's innermost magnetosphere, in particular during the gossamer ring passage.
Gruen Eberhard
Krueger Hans
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