Effect of ASTER DEM on the prediction of mean gravity anomalies: a case study over the Auvergne test region

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dc.contributor.authorAbbak, Ramazan Alpay
dc.date.accessioned2020-03-26T18:50:11Z
dc.date.available2020-03-26T18:50:11Z
dc.date.issued2014
dc.departmentSelçuk Üniversitesien_US
dc.description.abstractA precise gravimetric geoid determination requires height information and terrestrial gravity data with high accuracy and resolution. The height data is utilized for predicting mean free-air gravity anomalies as well as computing the topographic, atmospheric and downward continuation effects which are fundamental components of any geoid model. Nowadays the Digital Elevation Model (DEM) obtained from the Shuttle Radar Topography Mission (SRTM) has been widely used when an accurate regional DEM does not exist. In addition the DEM generated from Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) was newly released by researchers from Japan and United States. In this study the effect of ASTER DEM on the estimating mean free-air gravity anomalies in geoid determination were investigated in the Auvergne test area where one of its regions exhibits one of the most rugged topography over the world. The numerical results show that ASTER DEM gives worse statistics than SRTM DEM with respect to the accuracy of the height. Using ASTER DEM introduces discrepancies (compared to SRTM DEM) in the range of -4 to 10 mGal in the interpolation of free-air gravity anomalies. It is also proven that the geoid differences due to the use of ASTER DEM are a few centimeters, which remain below the accuracy level of the external GPS-levelling data.en_US
dc.identifier.doi10.1007/s40328-014-0062-8en_US
dc.identifier.endpage502en_US
dc.identifier.issn2213-5812en_US
dc.identifier.issn2213-5820en_US
dc.identifier.issue4en_US
dc.identifier.scopusqualityQ3en_US
dc.identifier.startpage491en_US
dc.identifier.urihttps://dx.doi.org/10.1007/s40328-014-0062-8
dc.identifier.urihttps://hdl.handle.net/20.500.12395/30763
dc.identifier.volume49en_US
dc.identifier.wosWOS:000346798500008en_US
dc.identifier.wosqualityQ4en_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.indekslendigikaynakScopusen_US
dc.language.isoenen_US
dc.publisherSPRINGERen_US
dc.relation.ispartofACTA GEODAETICA ET GEOPHYSICAen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.selcuk20240510_oaigen_US
dc.subjectASTERen_US
dc.subjectSRTMen_US
dc.subjectDigital Elevation Modelen_US
dc.subjectMean free-air gravity anomaliesen_US
dc.subjectRegional gravimetric geoiden_US
dc.titleEffect of ASTER DEM on the prediction of mean gravity anomalies: a case study over the Auvergne test regionen_US
dc.typeArticleen_US

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