GPS processing using online services

Tsakiri, M

dc.contributor.author	Tsakiri, M	en
dc.date.accessioned	2014-03-01T01:28:31Z
dc.date.available	2014-03-01T01:28:31Z
dc.date.issued	2008	en
dc.identifier.issn	0733-9453	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/18866
dc.subject	Accuracy	en
dc.subject	Datum	en
dc.subject	Geodetic surveys	en
dc.subject	Global positioning	en
dc.subject.classification	Engineering, Civil	en
dc.subject.other	Geodetic satellites	en
dc.subject.other	Global positioning system	en
dc.subject.other	Internet	en
dc.subject.other	Satellite navigation aids	en
dc.subject.other	Tracking (position)	en
dc.subject.other	Accuracy	en
dc.subject.other	Accurate	en
dc.subject.other	Comparison analysis	en
dc.subject.other	Data qualities	en
dc.subject.other	Datum	en
dc.subject.other	Different services	en
dc.subject.other	Geodetic surveys	en
dc.subject.other	Global positioning	en
dc.subject.other	High precisions	en
dc.subject.other	International gnss services	en
dc.subject.other	International terrestrial reference frames	en
dc.subject.other	Kinematic datum	en
dc.subject.other	Observation times	en
dc.subject.other	On-line	en
dc.subject.other	Online services	en
dc.subject.other	Post-processing	en
dc.subject.other	Data processing	en
dc.subject.other	accuracy assessment	en
dc.subject.other	coordinate	en
dc.subject.other	data quality	en
dc.subject.other	geodetic datum	en
dc.subject.other	geodetic network	en
dc.subject.other	GNSS	en
dc.subject.other	GPS	en
dc.subject.other	Internet	en
dc.subject.other	kinematics	en
dc.subject.other	performance assessment	en
dc.subject.other	precision	en
dc.title	GPS processing using online services	en
heal.type	journalArticle	en
heal.identifier.primary	10.1061/(ASCE)0733-9453(2008)134:4(115)	en
heal.identifier.secondary	http://dx.doi.org/10.1061/(ASCE)0733-9453(2008)134:4(115)	en
heal.language	English	en
heal.publicationDate	2008	en
heal.abstract	Online global positioning system (GPS) processing services have provided users with the opportunity to obtain freely high precision coordinates in a recognized datum. However, all services are dependent on the quality of the data and the length of data span supplied to them by the user. This study aims to assess the four globally available online GPS processing services from the point of view of a user wishing to take advantage of such a service for datum realization. Data from eight selected international GNSS service stations have been processed by each service and the results have allowed a statistically significant comparison analysis to be performed. Although users can expect a variability of results from different services when processing identical data, solutions with 24 h data are generally repeatable at the 1-2 cm level and accurate in terms of international terrestrial reference frame coordinate recovery at the 3-4 cm level. Such differences are accentuated as observation time decreases. Finally, postprocessing kinematic data, currently performed by only one online service, is a valid option for users provided they ensure data quality. © 2008 ASCE.	en
heal.publisher	ASCE-AMER SOC CIVIL ENGINEERS	en
heal.journalName	Journal of Surveying Engineering	en
dc.identifier.doi	10.1061/(ASCE)0733-9453(2008)134:4(115)	en
dc.identifier.isi	ISI:000260123400003	en
dc.identifier.volume	134	en
dc.identifier.issue	4	en
dc.identifier.spage	115	en
dc.identifier.epage	125	en