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Jovian decametric arcs - An estimate of the required wave normal angles from three-dimensional ray tracing.Three-dimensional ray tracing is applied to an analysis of variable radio wave normal angle effects on the associated decametric (DAM) arc structures in the Jovian magnetosphere. The analysis is bed on 1-40 MHz radio signature recorded during Voyage 1 and 2 passages. The frequencies considered are above the R-X cut-off, and several ratios of the emission frequency/source frequency. The ray tracing code is based on a cold plasma formula and integration of the Hasselgrove (1955) equations. It is assumed that the emission is in the R-X mode, the source lies at the foot of an Io flux tube, and the emission cone is hollow. Attention is focused on data for two intense, vertex-late, high curvature DAM arc. A possible source for the arcs is found to be doppler-shifted gyroemission from a beam of electrons with an energy of 10 keV. A value of 1.1 is set as the limit of the doppler shift of the DAM emissions.
Document ID
19850029403
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Menietti, J. D.
(Southwest Research Institute San Antonio, TX, United States)
Green, J. L.
(NASA Marshall Space Flight Center Huntsville, AL, United States)
Gulkis, S.
(California Institute of Technology, Jet Propulsion Laboratory, Pasadena CA, United States)
Six, N. F.
(Arecibo Observatory Arecibo, PR, United States)
Date Acquired
August 12, 2013
Publication Date
October 1, 1984
Publication Information
Publication: Journal of Geophysical Research
Volume: 89
ISSN: 0148-0227
Subject Category
Lunar And Planetary Exploration
Accession Number
85A11554
Funding Number(s)
CONTRACT_GRANT: JPL-956026
CONTRACT_GRANT: NAS7-100
Distribution Limits
Public
Copyright
Other

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