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Scientific results from the Pioneer Saturn infrared radiometerData on Saturn and its rings are presented, obtained by the Pioneer 11 infrared radiometer in broadband channels, centered at 20 and 45 microns. Assuming symmetry about the equator and a constant flux poleward of 7.5 deg latitude, an average effective temperature of 96.5 + or - 2.5 K indicates a total emission which is 2.8 times that of the absorbed sunlight. Temperatures at the 1 bar level are 137 and 140 K, and a minimum temperature averaging 87 K is registered near the 0.06 bar level. Ring boundaries and optical depths are consistent with those at optical wavelengths. Ring temperatures are 54-86 K on the south side, approximately 54 K on the north side, and at least 67 K in Saturn's shadow.
Document ID
19810059030
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Orton, G. S.
(California Institute of Technology, Jet Propulsion Laboratory; California Institute of Technology, Pasadena CA, United States)
Ingersoll, A. P.
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Froidevaux, L.
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Neugebauer, G.
(California Institute of Technology Pasadena, CA, United States)
Muench, G.
(Max-Planck-Institut fuer Astronomie Heidelberg, Germany)
Chase, S. C.
(Santa Barbara Research Center Santa Barbara, CA, United States)
Date Acquired
August 11, 2013
Publication Date
January 1, 1981
Subject Category
Lunar And Planetary Exploration
Accession Number
81A43434
Distribution Limits
Public
Copyright
Other

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