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Three-dimensional ray tracing of the Jovian magnetosphere in the low-frequency rangeThree-dimensional ray tracing of the Jovian DAM emission has been performed utilizing the O-4 magnetic field model (Acuna and Ness, 1979) and a realistic plasma model. Minimal assumptions about the emission mechanism have been made that include radiation in the right-hand extraordinary mode, propagating nearly perpendicular to the field line at source points located just above the RX cutoff frequency along Io flux tubes. Ray tracing has been performed in the frequency range from 2-35 MHz from successive Io flux tubes separated by ten degrees of central meridian longitude for a full circumference of northern hemisphere sources. The results show unusual complexity in model arc spectra that is displayed in a constant Io phase format with many similarities to the Voyager PRA data. The results suggest much of the variation in observed DAM spectral features is a result of propagation effects rather than emission process differences.
Document ID
19840043365
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, F.
(Arecibo Observatory Arecibo, PR, United States)
Date Acquired
August 12, 2013
Publication Date
March 1, 1984
Publication Information
Publication: Journal of Geophysical Research
Volume: 89
ISSN: 0148-0227
Subject Category
Lunar And Planetary Exploration
Accession Number
84A26152
Funding Number(s)
CONTRACT_GRANT: NAS7-100
CONTRACT_GRANT: JPL-956026
Distribution Limits
Public
Copyright
Other

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