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dc.contributor.authorChen, CSen_US
dc.contributor.authorYeh, TKen_US
dc.date.accessioned2014-12-08T15:42:50Z-
dc.date.available2014-12-08T15:42:50Z-
dc.date.issued2002-02-01en_US
dc.identifier.issn0733-9453en_US
dc.identifier.urihttp://dx.doi.org/10.1061/(ASCE)0733-9453(2002)128:1(21)en_US
dc.identifier.urihttp://hdl.handle.net/11536/29048-
dc.description.abstractThis paper presents two novel concepts to improve the precision of global positioning system (GPS). First, observations of the low cutoff angle are applied to GPS positioning for obtaining more information to enhance precision. However, unequal weight P = cos(2)(z) is used, where z denotes the zenith distance, since the noise of the GPS observations is increased following the increase of the zenith distance. Second, a short-range baseline field is used as the test area. In addition, the external precision of the GPS baseline is evaluated using the distance obtained with a precise telemeter to replace the conventional method, which uses internal precision, i.e., baseline repeatability or standard deviation. The analysis results indicate that the best precision of GPS positioning is obtained at a cutoff angle of 15degrees. Moreover, using unequal weight to receive low cutoff angle GPS observation data to positioning can improve the precision average 3 mm for our test baselines.en_US
dc.language.isoen_USen_US
dc.subjectglobal positioningen_US
dc.subjectoptimizationen_US
dc.subjectsurveysen_US
dc.subjectaccuracyen_US
dc.titleEnhancing precision of global positioning system using short-range distance baseline fielden_US
dc.typeArticleen_US
dc.identifier.doi10.1061/(ASCE)0733-9453(2002)128:1(21)en_US
dc.identifier.journalJOURNAL OF SURVEYING ENGINEERING-ASCEen_US
dc.citation.volume128en_US
dc.citation.issue1en_US
dc.citation.spage21en_US
dc.citation.epage38en_US
dc.contributor.department土木工程學系zh_TW
dc.contributor.departmentDepartment of Civil Engineeringen_US
dc.identifier.wosnumberWOS:000173590900002-
dc.citation.woscount3-
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