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A radiometric Bode's Law: Predictions for UranusThe magnetospheres of three planets, Earth, Jupiter, and Saturn, are known to be sources of intense, nonthermal radio bursts. The emissions from these sources undergo pronounced long term intensity fluctuations that are caused by the solar wind interaction with the magnetosphere of each planet. Determinations by spacecraft of the low frequency radio spectra and radiation beam geometry now permit a reliable assessment of the overall efficiency of the solar wind in stimulating these emissions. Earlier estimates of how magnetospheric radio output scales with the solar wind energy input must be revised greatly, with the result that, while the efficiency is much lower than previously thought, it is remarkably uniform from planet to planet. The formulation of a radiometric Bode's Law from which a planet's magnetic moment is estimated from its radio emission output is presented. Applying the radiometric scaling law to Uranus, the low-frequency radio power is likely to be measured by the Voyager 2 spacecraft as it approaches this planet.
Document ID
19840019591
Acquisition Source
Legacy CDMS
Document Type
Technical Memorandum (TM)
Authors
Desch, M. D. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Kaiser, M. L. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Date Acquired
September 4, 2013
Publication Date
March 1, 1984
Subject Category
Space Radiation
Report/Patent Number
NASA-TM-86074
NAS 1.15:86074
Accession Number
84N27659
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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