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Voyager measurement of the rotation period of Saturn's magnetic fieldSaturn's radio rotation period was determined using measurements made by the planetary radio astronomy experiment onboard the Voyager spacecraft. The sidereal period deduced, 10 hr 39 min 24 sec ? 7 sec, is within the 10 hr to 11 hr range of optical periods derived from a century of atmospheric spot and Doppler spectroscopy observations. The radio rotation period is presumably that of the planet's magnetic field. A provisional Saturn longitude convention is proposed and equations are provided to compute a longitude ephemeris and to transform between the proposed system and the (10 hr 14 min) system used for the Pioneer 11/Saturn encounter. The degree of longitude smearing which could result over the long term from the merging of data sets organized in this system is evaluated. No evidence of control of the radio emission by any of Saturn's satellites was found.
Document ID
Document Type
Preprint (Draft being sent to journal)
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
January 1, 1981
Subject Category
Lunar And Planetary Exploration
Report/Patent Number
Distribution Limits
Work of the US Gov. Public Use Permitted.

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