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dc.contributor.authorYeh, Ta-Kangen_US
dc.contributor.authorHwang, Cheinwayen_US
dc.contributor.authorHuang, Jiu-Fuen_US
dc.contributor.authorChao, Benjamin Fongen_US
dc.contributor.authorChang, Ming-Hanen_US
dc.date.accessioned2014-12-08T15:29:00Z-
dc.date.available2014-12-08T15:29:00Z-
dc.date.issued2011-08-01en_US
dc.identifier.issn1017-0839en_US
dc.identifier.urihttp://dx.doi.org/10.3319/TAO.2011.01.27.01(T)en_US
dc.identifier.urihttp://hdl.handle.net/11536/20915-
dc.description.abstractOcean tidal loading (OTL) is an important factor in GPS positioning, especially along the vertical direction. OTL influences the precision of GPS positioning and produces height variations of up to 12 cm. In this study, daily UPS data obtained from 27 GPS tracking stations around Taiwan were collected, and four OTL models were applied to relative static GPS positions derived from these data. The UPS data were obtained from 8 - 14 August 2006 (summer) and 1 - 30 January 2007 (winter). The software Bernese 5.0 was utilized for data processing. During the summer, the average GPS error along the vertical axis was 2.72 cm. After correcting the measured heights with the Schwiderski, NAO.99b, CSR4.0 and TPXO.6.2 models, the average errors became 2.30, 2.30, 2.30 and 2.31 cm, respectively. In winter, the average UPS error in the vertical direction was 1.32 cm. After correcting the heights using the above models, the average errors became 0.86, 0.85, 0.89 and 0.84 cm, respectively. The precision of the vertical direction was improved by approximately 15 - 36% on average. In eastern Taiwan, all UPS stations in the vertical direction have amplitudes smaller than 1 cm, because the ocean is more than 2000 m deep and with less shallow and narrow bights and estuaries. On the other hand, the amplitudes of GPS stations in northwestern Taiwan are larger than 1 cm because the ocean is only approximately 200 m deep. The amplitudes in the vertical direction of UPS stations are approximately 1.2 - 2.7 cm on the offshore islands of Taiwan, larger than average in Taiwan. In the future, local corrections from an OTL model are necessary for high accurate GPS positioning.en_US
dc.language.isoen_USen_US
dc.subjectGPSen_US
dc.subjectOcean tidal loadingen_US
dc.subjectVertical displacementen_US
dc.subjectTaiwanen_US
dc.titleVertical Displacement due to Ocean Tidal Loading Around Taiwan Based on GPS Observationsen_US
dc.typeArticleen_US
dc.identifier.doi10.3319/TAO.2011.01.27.01(T)en_US
dc.identifier.journalTERRESTRIAL ATMOSPHERIC AND OCEANIC SCIENCESen_US
dc.citation.volume22en_US
dc.citation.issue4en_US
dc.citation.spage373en_US
dc.citation.epage382en_US
dc.contributor.department土木工程學系zh_TW
dc.contributor.departmentDepartment of Civil Engineeringen_US
dc.identifier.wosnumberWOS:000293802500001-
dc.citation.woscount5-
Appears in Collections:Articles