Astronomy and Astrophysics – Astronomy
Scientific paper
Nov 1981
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981stin...8214037w&link_type=abstract
Unknown
Astronomy and Astrophysics
Astronomy
Broadband, Flux Density, Kilometric Waves, Planetary Radiation, Radio Astronomy, Radio Waves, Saturn (Planet), Voyager 2 Spacecraft, Dione, Electric Discharges, Electromagnetic Noise, Electrostatic Charge, Planetary Rotation, Plasma Waves, Polarization (Waves), Radio Spectra, Saturn Rings
Scientific paper
Voyager-2 planetry radio astronomy measurements obtained near Saturn are discussed. They indicate that Saturnian kilometric radiation is emitted by a strong, dayside source at auroral latitudes in the northern hemisphere and by a weaker (by more than an order of magnitude) source at complementary latitudes in the southern hemisphere. These emissions are variable both due to Saturn's rotation and, on longer time scales, probably due to influences of the solar wind and the satellite Dione. The Saturn electrostatic discharge bursts first discovered by Voyager-1 and attributed to emissions from the B-ring were again observed with the same broadband spectral properties and a 10(h)11(m) + or - 5(m) episodic recurrence period but with an occurrence frequency of only of about 30 percent of that detected with Voyager-1. During the crossing of the ring plane at a distance of 2.88 RS, an intense noise event is interpreted to be consequence of the impact/vaporization/ionization of charged micron-size G-ring particles distributed over a total vertical thickness of about 1500 km.
Alexander Joseph K.
Aubier M.
Desch Michael D.
Evans Robley D.
Kaiser Michael L.
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