Statistical study of Saturn electrostatic discharges

Details Statistical study of Saturn electrostatic discharges Statistical study of Saturn electrostatic discharges

Nov 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983jgr....88.9007z&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 88, Nov. 1, 1983, p. 9007-9018.

Astronomy and Astrophysics

Astronomy

24

Electrostatics, Planetary Radiation, Plasma Jets, Radio Sources (Astronomy), Saturn (Planet), Electric Discharges, Statistical Analysis, Time Response, Voyager 1 Spacecraft, Voyager 2 Spacecraft

Scientific paper

During the Voyager Saturn mission the Planetary Radio Astronomy (PRA) experiment observed sporadic broadband emissions (20 KHz to at least 40 MHz) during a few days around the Voyager 1 and 2 closest approaches to the planet. These emissions are interpreted to arise from short-lived electrostatic discharges in the vicinity of Saturn. A statistical study has been made of their characteristics from the Voyager 1 and 2 high-band data of the PRA experiment (1.2 MHz to 40.2 MHz). In this paper, the results obtained for the two encounters are compared, and the appearance, intensity, and spectrum of the Saturn electrostatic discharges (SED) are described in detail. It is shown that the SED spectrum is likely smooth in the frequency range 1-40 MHz and extends down to 20 KHz. The period of the SED occurrence, which seems to be slightly different for Voyager 1 and 2 encounters (10 hours 9 min for the Voyager 1 encounter and 10 hours 00 min for the Voyager 2 encounter) is determined. An attempt to interpret the statistical results is presented.

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