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Have Titan's North-Polar Lakes Changed?

hal.structure.identifierJet Propulsion Laboratory [JPL]
dc.contributor.authorWALL, Stephen D.
hal.structure.identifierDepartment of Astronomy [Ithaca]
dc.contributor.authorHAYES, A.
hal.structure.identifierCalifornia Institute of Technology [CALTECH]
dc.contributor.authorELACHI, C.
hal.structure.identifierProxemy Research Inc
dc.contributor.authorSTOFAN, E.
hal.structure.identifierSSE 2012
dc.contributor.authorPAILLOU, Philippe
dc.contributor.authorFORMICO, T.
hal.structure.identifierJet Propulsion Laboratory [JPL]
dc.contributor.authorMITCHELL, K.
hal.structure.identifierIstituto di Ricerca per la Protezione Idrogeologica [Bari] [IRPI]
dc.contributor.authorCASARANO, D.
hal.structure.identifierInstitute of Applied Remote Sensing [Bozano}
dc.contributor.authorNOTARNICOLA, C.
dc.date.issued2012-10
dc.date.conference2012
dc.description.abstractEnCassini's RADAR instrument acquired a SAR swath over Titan's north polar lakes on May 22, 2012 , providing repeat images of a number of the smaller lakes. Previous coverage of these lakes was obtained on various passes in 2006 and 2007. Among the principal objectives of the Cassini mission is to monitor the liquid in the lakes with the approach of northern summer. Evidence of change in the lakes' levels might consist of shoreline changes, changes in radar backscatter (e.g. as penetration increases or dry spots appear), or combinations of these. We have chosen ten lakes and lake complexes for study, ranging from -4 to -100 km largest dimension. Visual comparison of repeat images is complicated by the dissimilar imaging geometry and (in some cases) resolution, and by SAR speckle. There are ambiguous cases that require further study, but at this writing we cannot identify certain changes. Ambiguous cases will be analyzed by using electromagnetic models, which can also take into account different acquisition geometry. Further analysis will be carried out exploiting electromagnetic scattering models and inversion approaches (e.g., Bayesian) to provide estimate of the lake parameters and any related changes. Parts of the research described in this paper were carried out at the Jet Propulsion Laboratory, California Institute of Technology, under a contract with the National Aeronautics and Space Administration.
dc.language.isoen
dc.source.titleAmerican Astronomical Society, DPS meeting #44, #400.03 14-19 -October, Reno, USA - 2012
dc.title.enHave Titan's North-Polar Lakes Changed?
dc.typeCommunication dans un congrès
dc.subject.halPlanète et Univers [physics]/Astrophysique [astro-ph]/Planétologie et astrophysique de la terre [astro-ph.EP]
dc.subject.halPhysique [physics]/Astrophysique [astro-ph]/Planétologie et astrophysique de la terre [astro-ph.EP]
bordeaux.journalAmerican Astronomical Society
bordeaux.page#100.05
bordeaux.volume44
bordeaux.countryUS
bordeaux.title.proceedingAmerican Astronomical Society, DPS meeting #44, #400.03 14-19 -October, Reno, USA - 2012
bordeaux.conference.cityReno
bordeaux.peerReviewedoui
hal.identifierhal-00832595
hal.version1
hal.invitednon
hal.proceedingsoui
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-00832595v1
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