Performance analysis of ambiguity resolution on PPP and relative positioning techniques: consideration of satellite geometry

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dc.contributor.authorOgutcu, Sermet
dc.date.accessioned2024-02-23T14:34:21Z
dc.date.available2024-02-23T14:34:21Z
dc.date.issued2020
dc.departmentNEÜen_US
dc.description.abstractAmbiguity resolution plays an important role in surveying using Precise Point Positioning (PPP) and relative positioning techniques that require high accuracy. In this study, ambiguity resolution performance of PPP and relative positioning under the unobstructed (with 7 degrees cut-off angle) and constrained environment (with 25 degrees cut-off angle, such as nearby buildings and street-canyons) using final/ultra-rapid orbit and clock products are investigated for different observation time. Seventeen globally distributed stations and six baselines of lengths from 270 km to 2100 km are chosen for conducting PPP and relative positioning, respectively. A 31-day period in January 2018 is chosen for processing using 24-, 12-, 6-, 4-, 2- and 1-h observations. The results indicate that sub-mm to cm levels of improvement in horizontal and vertical coordinate components are generally observed with ambiguity resolution for PPP and relative positioning techniques compared to the float counterparts. Moreover, accuracy degradation of ambiguity resolution compared to float solution is observed generally in the vertical component using the 25 degrees elevation cut-off angle for both techniques. As the observation time increases, the accuracy improvements from ambiguity resolution decrease for each technique. In addition, fixing to the wrong integer ambiguities are generally seen with a short observation time and a 25 degrees elevation cut-off angle for both techniques due to the poor satellite geometry. As far as baseline length in relative technique is concerned, the testing results show that there is no direct relation between baseline length and the accuracy improvement from ambiguity resolution compared to the float solution. The results also reveal that the coordinates obtained from ambiguity resolution does not significantly change in the relative technique using final or ultra-rapid orbit/clock products, whereas the changes in PPP are significant for most of the stations.en_US
dc.identifier.doi10.26833/ijeg.580027
dc.identifier.endpage93en_US
dc.identifier.issn2548-0960
dc.identifier.issue2en_US
dc.identifier.scopus2-s2.0-85110848627en_US
dc.identifier.startpage73en_US
dc.identifier.urihttps://doi.org/10.26833/ijeg.580027
dc.identifier.urihttps://hdl.handle.net/20.500.12452/15552
dc.identifier.volume5en_US
dc.identifier.wosWOS:000517834600003en_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.indekslendigikaynakScopusen_US
dc.language.isoenen_US
dc.publisherSelcuk Univ Pressen_US
dc.relation.ispartofInternational Journal Of Engineering And Geosciencesen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/openAccessen_US
dc.subjectAmbiguity Resolutionen_US
dc.subjectGpsen_US
dc.subjectPrecise Point Positioningen_US
dc.subjectRelative Positioningen_US
dc.subjectSatellite Geometryen_US
dc.titlePerformance analysis of ambiguity resolution on PPP and relative positioning techniques: consideration of satellite geometryen_US
dc.typeArticleen_US

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