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DOI	10.5194/nhess-19-571-2019
	Assessment of geodetic velocities using GPS campaign measurements over long baseline lengths
	Duman, Huseyin; Sanli, Dogan Ugur
通讯作者	Sanli, Dogan Ugur
来源期刊	NATURAL HAZARDS AND EARTH SYSTEM SCIENCES
ISSN	1561-8633
出版年	2019
卷号	19 期号:3 页码:571-582
英文摘要	GPS campaign measurements are frequently used in order to determine geophysical phenomena such as tectonic motion, fault zones, landslides, and volcanoes. When observation duration is shorter, the accuracy of coordinates are degraded and the accuracy of point velocities are affected. The accuracies of the geodetic site velocities from a global network of International GNSS Service (IGS) stations were previously investigated using only PPP. In this study, we extend which site velocities will also be assessed, including fundamental relative positioning. PPP-derived results will also be evaluated to see the effect of reprocessed JPL products, single-receiver ambiguity resolution, repeating survey campaigns minimum 3 days at the site, and eliminating noisier solutions prior to the year 2000. To create synthetic GPS campaigns, 18 globally distributed, continuously operating IGS stations were chosen. GPS data were processed comparatively using GAMIT/GLOBK v10.6 and GIPSY-OASIS II v6.3. The data of synthetic campaign GPS time series were processed using a regression model accounting for the linear and seasonal variation of the ground motion. Once the velocities derived from 24 h sessions were accepted as the truth, the results from sub-sessions were compared with the results of 24 h and hypothesis testing was applied for the significance of the differences. The major outcome of this study is that on global scales (i.e. over long distances) with short observation sessions, the fundamental relative positioning produces results similar to PPP. The reliability of the velocity estimation for GPS horizontal baseline components has now been improved to about 85% of the average for observation durations of 12 h.
类型	Article
语种	英语
国家	Turkey
开放获取类型	Green Submitted, gold
收录类别	SCI-E
WOS记录号	WOS:000461626300002
WOS关键词	CRUSTAL DEFORMATION ; SOUTHERN CALIFORNIA ; PLATE KINEMATICS ; CONSTRAINTS ; ACCURACY ; TURKEY ; SPACE ; MOVEMENTS ; INSIGHTS ; STRAIN
WOS类目	Geosciences, Multidisciplinary ; Meteorology & Atmospheric Sciences ; Water Resources
WOS研究方向	Geology ; Meteorology & Atmospheric Sciences ; Water Resources
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/217715
作者单位	Yildiz Tech Univ, Dept Geomat Engn, TR-34220 Istanbul, Turkey
推荐引用方式 GB/T 7714	Duman, Huseyin,Sanli, Dogan Ugur. Assessment of geodetic velocities using GPS campaign measurements over long baseline lengths[J],2019,19(3):571-582.
APA	Duman, Huseyin,&Sanli, Dogan Ugur.(2019).Assessment of geodetic velocities using GPS campaign measurements over long baseline lengths.NATURAL HAZARDS AND EARTH SYSTEM SCIENCES,19(3),571-582.
MLA	Duman, Huseyin,et al."Assessment of geodetic velocities using GPS campaign measurements over long baseline lengths".NATURAL HAZARDS AND EARTH SYSTEM SCIENCES 19.3(2019):571-582.