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Planetary radio astronomy observations from Voyager 2 near SaturnPlanetary radio astronomy measurements obtained by Voyager 2 near Saturn have added further evidence that Saturnian kilometric radiation is emitted by a strong dayside source at auroral latitudes in the northern hemisphere and by a weaker source at complementary latitudes in the southern hemisphere. These emissions are variable because of Saturn's rotation and, on longer time scales, probably because of influences of the solar wind and Dione. The 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 an episodic recurrence period of about 10 hours, but their occurrence frequency was only about 30 percent of that detected by Voyager 1. While crossing the ring plane at a distance of 2.88 Saturn radii, the spacecraft detected an intense noise event extending to above 1 megahertz and lasting about 150 seconds. The event is interpreted to be a consequence of the impact, vaporization, and ionization of charged, micrometer-size G ring particles distributed over a vertical thickness of about 1500 kilometers.
Document ID
19820036476
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Warwick, J. W.
(Radiophysics, Inc. Boulder, CO, United States)
Evans, D. R.
(Radiophysics, Inc. Boulder, CO, United States)
Romig, J. H.
(Radiophysics, Inc. Boulder, CO, United States)
Alexander, J. K.
(Radiophysics, Inc. Boulder, CO, United States)
Desch, M. D.
(Radiophysics, Inc. Boulder, CO, United States)
Kaiser, M. L.
(NASA Goddard Space Flight Center Laboratory for Extraterrestrial Physics, Greenbelt, MD, United States)
Aubier, M.
(Radiophysics, Inc. Boulder, CO, United States)
Leblanc, Y.
(Radiophysics, Inc. Boulder, CO, United States)
Lecacheux, A.
(Radiophysics, Inc. Boulder, CO, United States)
Pedersen, B. M.
(Paris, Observatoire, Meudon Hauts-de-Seine, France)
Date Acquired
August 10, 2013
Publication Date
January 29, 1982
Publication Information
Publication: Science
Volume: 215
Subject Category
Lunar And Planetary Exploration
Accession Number
82A20011
Funding Number(s)
CONTRACT_GRANT: NAS7-100
Distribution Limits
Public
Copyright
Other

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