Height biases of SRTM DEM related to EGM96: from a global perspective to regional practice

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dc.contributor.authorÜstün, Aydın
dc.contributor.authorAbbak, Ramazan Alpay
dc.contributor.authorÖztürk, Emel Zeray
dc.date.accessioned2020-03-26T19:54:08Z
dc.date.available2020-03-26T19:54:08Z
dc.date.issued2018
dc.departmentSelçuk Üniversitesien_US
dc.description.abstractIt is investigated to what extent EGM96 affects the accuracy of digital elevation model (DEM) produced from the shuttle radar topography mission (SRTM). Global and regional analysis of EGM96 compared with EGM2008 indicate that locally there are large differences distorting to the accuracy level of SRTM DEM. In the absolute sense, the overall geoid differences throughout 1 x 1 arc-degree tiles reach -5m in the northeast and 2-3m in the southern parts of Turkey. A numerical investigation over the test profiles of 200-700 km length running at various directions proves that a possible vertical datum change from EGM96 to EGM2008 yields systematically more accurate height information with an improvement of up to 2.5 m. A GPS-levelling traverse of about 900 km length points out some key patterns of this recovery. Consequently, a correction for the present version of SRTM DEM should be considered in critical implementations of Earth sciences like geoid or water flow modelling, especially for areas where EGM96 shows weak performance.en_US
dc.description.sponsorshipScientific and Technological Research Council of TurkeyTurkiye Bilimsel ve Teknolojik Arastirma Kurumu (TUBITAK) [106Y130]en_US
dc.description.sponsorshipNASA and NGA are cordially acknowledged for providing EGM96 and SRTM DEM, EGM08, respectively. The authors gratefully thank the support of The Scientific and Technological Research Council of Turkey under grant number 106Y130 in gathering the DGPS data. Dr Orhan Kurt helped with technical study in collecting some part of data. The authors appreciate the constructive remarks suggested by two anonymous reviewers in the first version of this manuscript.en_US
dc.identifier.doi10.1080/00396265.2016.1218159en_US
dc.identifier.endpage35en_US
dc.identifier.issn0039-6265en_US
dc.identifier.issn1752-2706en_US
dc.identifier.issue358en_US
dc.identifier.scopusqualityQ2en_US
dc.identifier.startpage26en_US
dc.identifier.urihttps://dx.doi.org/10.1080/00396265.2016.1218159
dc.identifier.urihttps://hdl.handle.net/20.500.12395/36667
dc.identifier.volume50en_US
dc.identifier.wosWOS:000435465400004en_US
dc.identifier.wosqualityQ3en_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.indekslendigikaynakScopusen_US
dc.language.isoenen_US
dc.publisherTAYLOR & FRANCIS LTDen_US
dc.relation.ispartofSURVEY REVIEWen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.selcuk20240510_oaigen_US
dc.subjectAccuracy assessmenten_US
dc.subjectGeoid heighten_US
dc.subjectDigital elevation modelen_US
dc.subjectEarth gravitational modelen_US
dc.subjectShuttle radar topography missionen_US
dc.titleHeight biases of SRTM DEM related to EGM96: from a global perspective to regional practiceen_US
dc.typeArticleen_US

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