A new approach to outlying data in estimation of vertical total electron content

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dc.authoridErenoğlu, Ramazan Cüneyt / 0000-0002-8212-8379
dc.contributor.authorErenoğlu, Ramazan Cüneyt
dc.date.accessioned2025-01-27T21:19:28Z
dc.date.available2025-01-27T21:19:28Z
dc.date.issued2015
dc.departmentÇanakkale Onsekiz Mart Üniversitesi
dc.description.abstractFor all scientific studies, for processing analytical data the subject of outliers is of critical importance. The accuracy of Total Electron Content (TEC) models obtained from ground based Global Positioning Systems (GPS) data is strongly affected by some factors such as satellite geometry, cut-off angle, ionospheric shell height, quantity of GPS data etc. Probable outliers within the observables have a significant effect on the quality of the estimated TEC modelling. These should be removed from the TEC time series in order to get more reliable results for further process. Although some analytical methods have been developed for the code-outliers, phase-slips and ionosphere disturbances, significant reduction in the number of measurement could adversely affect the quality of the generated TEC values using geometry-free combinations of those. In this study, we proposed a novel approach for outlier detection to be used at geometry-free combinations in estimation of vertical TEC without reducing the number of code observables. Here the GPS data obtained from 22 permanent stations are used to estimate the VTEC on May 14-15, 2005. The research results from the detailed processing clearly show the efficiency of the method. Our research shows that the proposed approach appears to be a fast, effective and objective method to detect outlying effects which cause improper modelling. Moreover the resulting VTEC maps from the new approach differ reliably with respect to the data including outlying observables. Consequently, the proposed method could provide an alternative to outlier rejection in estimation of VTEC, in which outlying observations are retained in geometry-free combinations.
dc.identifier.doi10.17559/TV-20141117201942
dc.identifier.endpage979
dc.identifier.issn1330-3651
dc.identifier.issn1848-6339
dc.identifier.issue4
dc.identifier.scopus2-s2.0-84938835135
dc.identifier.scopusqualityQ3
dc.identifier.startpage971
dc.identifier.urihttps://doi.org/10.17559/TV-20141117201942
dc.identifier.urihttps://hdl.handle.net/20.500.12428/28623
dc.identifier.volume22
dc.identifier.wosWOS:000359365100021
dc.identifier.wosqualityQ4
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.language.isoen
dc.publisherUniv Osijek, Tech Fac
dc.relation.ispartofTehnicki Vjesnik-Technical Gazette
dc.relation.publicationcategoryinfo:eu-repo/semantics/openAccess
dc.rightsinfo:eu-repo/semantics/openAccess
dc.snmzKA_WoS_20250125
dc.subjectdiscordant data
dc.subjectGPS
dc.subjectmedian
dc.subjectoutlier
dc.subjecttotal electron content
dc.titleA new approach to outlying data in estimation of vertical total electron content
dc.title.alternativeNovi pristup vanjskim (outlying) podacima u procjeni vertikalnog ukupnog sadržaja elektrona
dc.typeArticle

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