Abstract
IT has been known since 1955 that Jupiter is a strong source of radio emission. The emission lies in the range from 5 MHz to 10,000 MHz, divided into decametric (5 to 40 MHz) and decimetric (100 to 10,000 MHz) subranges. At lower frequencies the Earth's ionosphere interferes. Determination of emission characteristics below about 5 MHz requires measurements from above the Earth's ionosphere. This article does not concern the decimetric radiation, generated by electrons spiralling around magnetic field lines in Jupiter's magnetosphere. Instead, it identifies a non-Io-controlled “fifth” source of the remarkably intense and variable decametric radiation from a region on or near the visible planetary disk.
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References
Bigg, E. K., Nature, 203, 1088 (1964).
Dulk, G. A., NCAR Cooperative Thesis No. 1, Univ. of Colorado and HAO of NCAR (1965).
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WILSON, R., WARWICK, J. & LIBBY, W. Fifth Source of Jupiter Decametric Radiation. Nature 220, 1215–1218 (1968). https://doi.org/10.1038/2201215a0
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DOI: https://doi.org/10.1038/2201215a0
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