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Microwave dielectric constant of liquid hydrocarbons: Application to the depth estimation of Titan's lakes

hal.structure.identifierLaboratoire d'astrodynamique, d'astrophysique et d'aéronomie de bordeaux [L3AB]
hal.structure.identifierObservatoire aquitain des sciences de l'univers [OASU]
hal.structure.identifierLaboratoire d'Astrophysique de Bordeaux [Pessac] [LAB]
dc.contributor.authorPAILLOU, Philippe
hal.structure.identifierJet Propulsion Laboratory [JPL]
dc.contributor.authorMITCHELL, K. L.
hal.structure.identifierJet Propulsion Laboratory [JPL]
dc.contributor.authorWALL, Stephen D.
hal.structure.identifierLaboratoire de l'intégration, du matériau au système [IMS]
dc.contributor.authorRUFFIÉ, Gilles
hal.structure.identifierWheeling Jesuit University
dc.contributor.authorWOOD, C.
hal.structure.identifierJohns Hopkins University Applied Physics Laboratory [Laurel, MD] [APL]
dc.contributor.authorLORENZ, R. D.
hal.structure.identifierProxemy Research Inc
dc.contributor.authorSTOFAN, Ellen R.
hal.structure.identifierLunar and Planetary Laboratory [Tucson] [LPL]
dc.contributor.authorLUNINE, J.I.
hal.structure.identifierJet Propulsion Laboratory [JPL]
dc.contributor.authorLOPES, R.
hal.structure.identifierLaboratoire d'Etude du Rayonnement et de la Matière en Astrophysique [LERMA]
dc.contributor.authorENCRENAZ, P.
dc.date.issued2008
dc.identifier.issn0094-8276
dc.description.abstractEnCassini RADAR reveals the surface of Titan since flyby Ta acquired on October 2004. The RADAR instrument discovered volcanic structures, craters, dunes, channels, lakes and seas. In particular, flyby T16 realized in July 2006 imaged tens of radar-dark features close to Titan's north pole. They are interpreted as lakes filled with liquid hydrocarbons - mainly methane, a key material in the geologic and climatic history of Titan. In order to perform quantitative analysis and modeling of the radar response of Titan's lakes, the dielectric constant of liquid hydrocarbons is a crucial parameter, in particular to estimate the radar wave attenuation. We present here first measurements of the dielectric constant of LNG (Liquefied Natural Gas), mainly composed of methane, at Ku-band (10-13 GHz): we obtained a value = 1.75 - 0.002j. This value is used to model the radar backscattering of lakes observed during T16 flyby. Using a two-layer scattering model, we derive a relationship that is used to estimate a minimum depth for Titan's lakes. The proposed relationship is also coherent with the observation that the larger and then the deeper lakes are also the darker in radar images.
dc.language.isoen
dc.publisherAmerican Geophysical Union
dc.title.enMicrowave dielectric constant of liquid hydrocarbons: Application to the depth estimation of Titan's lakes
dc.typeArticle de revue
dc.identifier.doi10.1029/2007GL032515
dc.subject.halPhysique [physics]/Astrophysique [astro-ph]/Cosmologie et astrophysique extra-galactique [astro-ph.CO]
dc.subject.halPlanète et Univers [physics]/Astrophysique [astro-ph]
bordeaux.journalGeophysical Research Letters
bordeaux.pageL05202
bordeaux.issue35
bordeaux.peerReviewedoui
hal.identifierhal-00265868
hal.version1
hal.popularnon
hal.audienceInternationale
dc.subject.esTitan
dc.subject.eslakes
dc.subject.esdielectric constant
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-00265868v1
bordeaux.COinSctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Geophysical%20Research%20Letters&rft.date=2008&rft.issue=35&rft.spage=L05202&rft.epage=L05202&rft.eissn=0094-8276&rft.issn=0094-8276&rft.au=PAILLOU,%20Philippe&MITCHELL,%20K.%20L.&WALL,%20Stephen%20D.&RUFFI%C3%89,%20Gilles&WOOD,%20C.&rft.genre=article


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