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Cassini-VIMS at Jupiter: solar occulation measurements using Io

Formisano, V. and D'Aversa, E. and Bellucci, G. and Baines, K.H. and Bibring, J.P. and Brown, R.H. and Buratti, B.J. and Capaccioni, F. and Cerroni, P. and Clark, R.N. and Coradini, A. and Cruikshank, D.P. and Drossart, P. and Jaumann, R. and Langevin, Y. and Matson, D.L. and McCord, T.B. and Mennella, V. and Nelson, R.M. and Nicholson, P.D. and Sicardy, B. and Sotin, C. and Chamberlain, M.C. and Hansen, G. and Hibbits, K. and Showalter, M. and Filacchione, G. (2003) Cassini-VIMS at Jupiter: solar occulation measurements using Io. Icarus, 166, pp. 75-84.

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Abstract

We report unusual and somewhat unexpected observations of the jovian satellite Io, showing strong methane absorption bands. These observations were made by the Cassini VIMS experiment during the Jupiter flyby of December/January 2000/2001. The explanation is straightforward: Entering or exiting from Jupiter's shadow during an eclipse, Io is illuminated by solar light which has transited the atmosphere of Jupiter. This light, therefore becomes imprinted with the spectral signature of Jupiter's upper atmosphere, which includes strong atmospheric methane absorption bands. Intercepting solar light refracted by the jovian atmosphere, Io essentially becomes a "mirror" for solar occultation events of Jupiter. The thickness of the layer where refracted solar light is observed is so large (more than 3000 km at Io's orbit), that we can foresee a nearly continuous multi-year period of similar events at Saturn, utilizing the large and bright ring system. During Cassini's 4-year nominal mission, this probing technique should reveal information of Saturn's atmosphere over a large range of southern latitudes and times.

Item URL in elib:https://elib.dlr.de/10903/
Document Type:Article
Additional Information: LIDO-Berichtsjahr=2004,
Title:Cassini-VIMS at Jupiter: solar occulation measurements using Io
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Formisano, V.Instituto di Fisica dello Spazio Interplanetario, CNR, Rome, ItalyUNSPECIFIED
D'Aversa, E.Instituto di Fisica dello Spazio Interplanetario, CNR, Rome, ItalyUNSPECIFIED
Bellucci, G.Instituto di Fisica dello Spazio Interplanetario, CNR, Rome, ItalyUNSPECIFIED
Baines, K.H.Jet Propulsion Laboratory, Pasadena, CAUNSPECIFIED
Bibring, J.P.Institut d'Astrophysique Spatiale, Université de Paris, FranceUNSPECIFIED
Brown, R.H.Lunar and Planetary Lab and Stewart Observatory, University of Arizona, Tucson, AZUNSPECIFIED
Buratti, B.J.Jet Propulsion Laboratory, Pasadena, CAUNSPECIFIED
Capaccioni, F.Istituto di Astrofisica Spaziale e Fisica Cosmica, CNR, Rome, ItalyUNSPECIFIED
Cerroni, P.Istituto di Astrofisica Spaziale e Fisica Cosmica, CNR, Rome, ItalyUNSPECIFIED
Clark, R.N.US Geological Survey, Denver, COUNSPECIFIED
Coradini, A.Instituto di Fisica dello Spazio Interplanetario, CNR, Rome, ItalyUNSPECIFIED
Cruikshank, D.P.NASA Ames Research Center, Moffet Field, CAUNSPECIFIED
Drossart, P.Observatoire de Paris, Meudon, FranceUNSPECIFIED
Jaumann, R.UNSPECIFIEDUNSPECIFIED
Langevin, Y.Institut d'Astrophysique Spatiale, Université de Paris, FranceUNSPECIFIED
Matson, D.L.Jet Propulsion Laboratory, Pasadena, CAUNSPECIFIED
McCord, T.B.Department of Earth and Space Sciences, University of Washington, Seattle,WAUNSPECIFIED
Mennella, V.INAF-Observatorio Astronomico di Capodimonte, ItalyUNSPECIFIED
Nelson, R.M.Jet Propulsion Laboratory, Pasadena, CAUNSPECIFIED
Nicholson, P.D.Cornell University, Astronomy Department, Ithaca, NYUNSPECIFIED
Sicardy, B.Observatoire de Paris, Meudon, FranceUNSPECIFIED
Sotin, C.Laboratoire de Planetologie et Geodinamique, Université de Nantes, FranceUNSPECIFIED
Chamberlain, M.C.(Lunar and Planetary Lab and Stewart Observatory, University of Arizona, Tucson, AZUNSPECIFIED
Hansen, G.(Department of Earth and Space Sciences, University of Washington, Seattle,WAUNSPECIFIED
Hibbits, K.Department of Earth and Space Sciences, University of Washington, Seattle,WAUNSPECIFIED
Showalter, M.NASA Ames Research Center, Moffet Field, CAUNSPECIFIED
Filacchione, G.Istituto di Astrofisica Spaziale e Fisica Cosmica, CNR, Rome, ItalyUNSPECIFIED
Date:2003
Journal or Publication Title:Icarus
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:Yes
Volume:166
Page Range:pp. 75-84
Status:Published
Keywords:Occultations, Jupiter, Infrared observations
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Space (old)
HGF - Program Themes:W EW - Erforschung des Weltraums
DLR - Research area:Space
DLR - Program:W EW - Erforschung des Weltraums
DLR - Research theme (Project):UNSPECIFIED
Location: Berlin-Adlershof
Institutes and Institutions:Institute of Planetary Research
Deposited By: Pieth, Susanne
Deposited On:08 Dec 2005
Last Modified:14 Jan 2010 16:29

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