ROBUSTNESS ANALYSIS OF GEODETIC NETWORKS IN THE CASE OF CORRELATED OBSERVATIONS

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dc.contributor.authorYetkin, Mevlut
dc.contributor.authorBerber, Mustafa
dc.contributor.authorInal, Cevat
dc.date.accessioned2020-03-26T18:43:14Z
dc.date.available2020-03-26T18:43:14Z
dc.date.issued2013
dc.departmentSelçuk Üniversitesien_US
dc.description.abstractGPS (or GNSS) networks are invaluable tools for monitoring natural hazards such as earthquakes. However, blunders in GPS observations may be mistakenly interpreted as deformation. Therefore, robust networks are needed in deformation monitoring using GPS networks. Robustness analysis is a natural merger of reliability and strain and defined as the ability to resist deformations caused by the maximum undetectable errors as determined from internal reliability analysis. However, to obtain rigorously correct results; the correlations among the observations must be considered while computing maximum undetectable errors. Therefore, we propose to use the normalized reliability numbers instead of redundancy numbers (Baarda's approach) in robustness analysis of a GPS network. A simple mathematical relation showing the ratio between uncorrelated and correlated cases for maximum undetectable error is derived. The same ratio is also valid for the displacements. Numerical results show that if correlations among observations are ignored, dramatically different displacements can be obtained depending on the size of multiple correlation coefficients. Furthermore, when normalized reliability numbers are small, displacements get large, i.e., observations with low reliability numbers cause bigger displacements compared to observations with high reliability numbers.en_US
dc.description.sponsorshipScientific and Technological Research Council of TurkeyTurkiye Bilimsel ve Teknolojik Arastirma Kurumu (TUBITAK)en_US
dc.description.sponsorshipThe first author wishes to acknowledge the support by The Scientific and Technological Research Council of Turkey for his research at Florida Atlantic University.en_US
dc.identifier.doi10.1590/S1982-21702013000300006en_US
dc.identifier.endpage451en_US
dc.identifier.issn1982-2170en_US
dc.identifier.issue3en_US
dc.identifier.scopusqualityN/Aen_US
dc.identifier.startpage434en_US
dc.identifier.urihttps://dx.doi.org/10.1590/S1982-21702013000300006
dc.identifier.urihttps://hdl.handle.net/20.500.12395/29794
dc.identifier.volume19en_US
dc.identifier.wosWOS:000325274500006en_US
dc.identifier.wosqualityQ4en_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.indekslendigikaynakScopusen_US
dc.language.isoenen_US
dc.publisherUNIV FEDERAL PARANA, CENTRO POLITECNICOen_US
dc.relation.ispartofBOLETIM DE CIENCIAS GEODESICASen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/openAccessen_US
dc.selcuk20240510_oaigen_US
dc.subjectRobustnessen_US
dc.subjectStrainen_US
dc.subjectDisplacementen_US
dc.subjectReliabilityen_US
dc.subjectGPS Networken_US
dc.titleROBUSTNESS ANALYSIS OF GEODETIC NETWORKS IN THE CASE OF CORRELATED OBSERVATIONSen_US
dc.typeArticleen_US

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