NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
Long-term changes in Jovian synchrotron radio emission - Intrinsic variations or effects of viewing geometry?Possible causes of the observed long-term variation of Jovian synchrotron radio emission, including both intrinsic changes in the Jovian radiation belts and apparent changes due to variations in the Jovigraphic declination of the earth, D sub E, are investigated. An increase in diffusion rate with other parameters held constant results in an inward displacement of the peak emission radial distance that is not observed. Effects of viewing geometry changes are examined. The possible importance of such effects is suggested by a correlation between the total decimetric radio flux and D sub E, which varies between -3.3 and +3.3 deg during one Jovian orbital period. Because the Jovian central meridian longitudes where the magnetic latitude passes through zero during a given Jovian rotation change substantially with D sub E and since significant longitudinal asymmetries exist in both the volume emissivity and the latitudinal profile of the beam, the total intensity should be at least a partial function of D sub E.
Document ID
19930049296
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Hood, Lon L.
(Arizona Univ. Tucson, United States)
Date Acquired
August 16, 2013
Publication Date
April 1, 1993
Publication Information
Publication: Journal of Geophysical Research
Volume: 98
Issue: A4
ISSN: 0148-0227
Subject Category
Lunar And Planetary Exploration
Accession Number
93A33293
Funding Number(s)
CONTRACT_GRANT: NAGW-1658
Distribution Limits
Public
Copyright
Other

Available Downloads

There are no available downloads for this record.
No Preview Available