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Second Harmonic Hectometric Radio Emission at JupiterGalileo has been in orbit around Jupiter since December 1995. The plasma wave instrument on board the spacecraft has occasionally detected a rotationally modulated attenuation band in the hectometric (HOM) emission that most likely is due to scattering of the radiation from density fluctuations along the Io L-shell, as reported earlier. The occurrence of the attenuation band is likely to be dependent on Io activity and the presence of density scattering centers along the Io-L-shell as well as the location of the source region. Some of the attenuation bands show clear indications of second harmonic emission. Without polarization measurements, it is difficult to place constraints on the local generation conditions based on the cyclotron maser instability, but the results imply that second harmonic emission could be present in the decametric (DAM) radiation as well. A survey of the data has revealed about 30 examples of second harmonic HOM.
Document ID
20020033231
Acquisition Source
Jet Propulsion Laboratory
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Menietti, J. D.
(Iowa Univ. Iowa City, IA United States)
Gurnett, D. A.
(Iowa Univ. Iowa City, IA United States)
Groene, J. B.
(Iowa Univ. Iowa City, IA United States)
Date Acquired
August 20, 2013
Publication Date
December 15, 1998
Publication Information
Publication: Geophysical Research Letters
Publisher: American Geophysical Union
Volume: 25
Issue: 24
ISSN: 0094-8276
Subject Category
Astrophysics
Report/Patent Number
Paper-1998GL900193
Funding Number(s)
CONTRACT_GRANT: JPL-958779
Distribution Limits
Public
Copyright
Other

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