An Overview of Cassini Radio, Plasma Wave, and Langmuir Probe Observations in the Vicinity of Saturn

Details An Overview of Cassini Radio, Plasma Wave, and Langmuir Probe Observations in the Vicinity of Saturn An Overview of Cassini Radio, Plasma Wave, and Langmuir Probe Observations in the Vicinity of Saturn

Dec 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004agufm.p54a..02g&link_type=abstract

American Geophysical Union, Fall Meeting 2004, abstract #P54A-02

Physics

7867 Wave/Particle Interactions, 7871 Waves And Instabilities, 5737 Magnetospheres (2756), 5759 Rings And Dust

Scientific paper

The Cassini Radio and Plasma Wave Science (RPWS) instrument detected a wide variety of radio and plasma wave phenomena during the approach and first flyby of Saturn. These include Saturn kilometric radiation (SKR), Saturn electrostatic discharges (SEDs), upstream electrostatic waves, the bow shock, trapped continuum radiation, whistler-mode chorus emissions, electrostatic upper-hybrid emissions, impulsive signals from dust impacts, narrowband electromagnetic emissions in the low-density inner region of the magnetosphere, whistler-mode resonance-cone emissions similar to terrestrial auroral hiss, and many sporadic narrowband whistler-mode emissions apparently associated with the rings. In addition, electron density and temperature measurements were obtained from a Langmuir probe. In this paper we interpret these observations in terms of various key parameters and processes in the Saturnian system. These including new values for the radio rotation period of Saturn, long term variations in the occurrence of atmospheric lightning, the plasma density and temperature in the inner region of Saturn's magnetosphere, the distribution of micron-sized particle near the ring plane, evidence of an electrodynamic interaction between the rings and the co-rotating magnetosphere of Saturn, and the possible occurrence of meteoroid impacts on the rings.

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