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Science 1 June 1979:
Vol. 204. no. 4396, pp. 995 - 998
DOI: 10.1126/science.204.4396.995
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Articles

Voyager 1 Planetary Radio Astronomy Observations Near Jupiter

J. W. WARWICK 1, J. B. PEARCE 1, A. C. RIDDLE 1, J. K. ALEXANDER 2, M. D. DESCH 2, M. L. KAISER 2, J. R. THIEMAN 2, T. D. CARR 3, S. GULKIS 4, A. BOISCHOT 5, C. C. HARVEY 5, and B. M. PEDERSEN 5

1 Laboratory for Applied Plasma Studies, Science Applications, Incorporated, Boulder, Colorado 80302
2 Laboratory for Extraterrestrial Physics, Goddard Space Flight Center, Greenbelt, Maryland 20771
3 Department of Physics and Astronomy, University of Florida, Gainesville 32611
4 Jet Propulsion Laboratory, Pasadena, California 91103
5 Observatoire de Paris, Section d'Astrophysique de Meudon, 92190 Meudon, France

We report results from the first low-frequency radio receiver to be transported into the Jupiter magnetosphere. We obtained dramatic new information, both because Voyager was near or in Jupiter's radio emission sources and also because it was outside the relatively dense solar wind plasma of the inner solar system. Extensive radio spectral arcs, from above 30 to about 1 megahertz, occurred in patterns correlated with planetary longitude. A newly discovered kilometric wavelength radio source may relate to the plasma torus near Io's orbit. In situ wave resonances near closest approach define an electron density profile along the Voyager trajectory and form the basis for a map of the torus. Detailed studies are in progress and are out-lined briefly.

Submitted on April 23, 1979


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Science. ISSN 0036-8075 (print), 1095-9203 (online)