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Voyager spacecraft radio observations of Jupiter - Initial cruise resultsLow frequency (below 1326 kHz) observations of Jupiter obtained from November, 1977 through June, 1978 by the radio astronomy receivers carried by the two Voyager spacecraft are reported and compared with a large body of higher-frequency ground-based observations. Although the morphology of hectometric wavelength (HOM) emissions strongly resembles that of decametric (DAM) wavelength radio noise, they display opposite polarization. DAM emissions are strongly modulated by Io, whereas HOM emissions exhibit little or no influence from any satellite and appear to be modulated by the rotation phase of the planet. Several single-source models could possibly account for these results, including a model assuming emission at two well-separated frequencies above and below the local electron plasma frequency and the model proposed by Barbosa (1976) in which electrostatic waves at twice the upper hybrid frequency couple to both the ordinary and extraordinary electromagnetic modes. However, neither of these is entirely satisfactory.
Document ID
19790057283
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Kaiser, M. L.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Desch, M. D.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Alexander, J. K.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Thieman, J. R.
(NASA Goddard Space Flight Center Greenbelt, Md., United States)
Riddle, A. C.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Pearce, J. B.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Warwick, J. W.
(Science Applications, Inc. Boulder, Colo., United States)
Lecacheux, A.
(Paris, Observatoire, Meudon Hauts-de-Seine, France)
Date Acquired
August 9, 2013
Publication Date
June 1, 1979
Publication Information
Publication: Geophysical Research Letters
Volume: 6
Subject Category
Lunar And Planetary Exploration
Accession Number
79A41296
Distribution Limits
Public
Copyright
Other

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