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dc.contributor.authorShoemaker, E. S.
dc.contributor.authorBaker, D. M. H.
dc.contributor.authorCarter, L. M.
dc.date.accessioned2018-11-16T22:44:29Z
dc.date.available2018-11-16T22:44:29Z
dc.date.issued2018-06
dc.identifier.citationShoemaker, E. S., Baker, D. M. H., & Carter, L. M. (2018). Radar sounding of open basin lakes on Mars. Journal of Geophysical Research: Planets, 123, 1395–1406. https://doi.org/10.1029/2018JE005591en_US
dc.identifier.issn21699097
dc.identifier.doi10.1029/2018JE005591
dc.identifier.urihttp://hdl.handle.net/10150/631020
dc.description.abstractOrbital observations of the surface of Mars indicate that ancient basins were once host to lakes that may have been depocenters of sedimentary materials, including hydrated minerals like phyllosilicates. Later volcanic and sedimentary resurfacing may have developed a stratigraphy within the basins detectable through radar sounding data from the Shallow Radar instrument. Our radar survey of 61 open basin lakes (OBLs) revealed only one plausible reflector in a single basin east of Hellas Planitia. We investigated possible factors contributing to lack of radar detections in the other basins through detailed analysis of radargrams and subsurface characteristics of OBLs. As possible hosts to previous habitable environments, OBLs on Mars are important sites for future robotic and human missions. A full understanding of the factors influencing the radar signal, as addressed here, is important for more fully characterizing the subsurface structure and geology at these locations. Plain Language Summary Mars was once host to ancient lakes that can currently be observed as a topographic depression in the surface with channels where water is thought to have once flowed called an open basin lake. This flowing water transported sediments into the lake which was later covered by further sedimentary or volcanic deposits. The interface between layers of material in the subsurface can be detected from orbit using the Shallow Radar instrument. Our survey of 61 open basin lakes revealed only one detectable interface in a single basin lake. We investigate possible factors that could contribute to the lack of identified interfaces through detailed analyses of available radar images and surface characteristics of the open basin lakes. We develop a method to characterize the degree of noise (clutter) in the radar images created by large surface features (>100m) up to 25km away from the position of the ground track of the spacecraft. However, this alone cannot explain the lack of detected interfaces. A rough subsurface or interface may be more likely. Further modeling will be necessary to characterize the radar characteristics of these basins as many are landing site candidates for future missions searching for formerly habitable environments.en_US
dc.description.sponsorshipMaryland Space Grant Consortium [NNX15AJ21H]; NASA Postdoctoral Programen_US
dc.language.isoenen_US
dc.publisherAMER GEOPHYSICAL UNIONen_US
dc.relation.urlhttp://doi.wiley.com/10.1029/2018JE005591en_US
dc.rights©2018. American Geophysical Union. All Rights Reserved.en_US
dc.subjectMarsen_US
dc.subjectopen basin lakesen_US
dc.subjectShallow Radar (SHARAD)en_US
dc.subjectradaren_US
dc.subjectroughnessen_US
dc.subjectlanding sitesen_US
dc.titleRadar Sounding of Open Basin Lakes on Marsen_US
dc.typeArticleen_US
dc.contributor.departmentUniv Arizona, Lunar & Planetary Laben_US
dc.identifier.journalJOURNAL OF GEOPHYSICAL RESEARCH-PLANETSen_US
dc.description.note6 month embargo; published online: 17 May 2018en_US
dc.description.collectioninformationThis item from the UA Faculty Publications collection is made available by the University of Arizona with support from the University of Arizona Libraries. If you have questions, please contact us at repository@u.library.arizona.edu.en_US
dc.eprint.versionFinal published versionen_US
dc.source.journaltitleJournal of Geophysical Research: Planets
dc.source.volume123
dc.source.issue6
dc.source.beginpage1395
dc.source.endpage1406
refterms.dateFOA2018-11-17T00:00:00Z


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