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《Journal of Highway and Transportation Research and Development》 2007-03
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The Influence of GPS Network Observation Time on Baseline Accuracy for Su-Tong Large Bridge

TIAN Lin-ya~1,XIA Kai-wang~2,YUE Dong-jie~1,HUANG Xiao-shi~1 (1.Department of Survey Engineering,Hohai University,Jiangsu Nanjing 210098,China;2.Department of Civil Engineering,Anhui Institute of Architecture & Industry,Anhui Hefei 230601,China)  
Selected several crossing-river baselines beside bridge axis of GPS network of Su-Tong large bridge,the baseline accuracy varying with observation time is analyzed.The continuously observed data for twenty four hours is accumulated at intervals of one hour,It is found out that the baseline accuracy isn't obviously raised with the increase of superabundant observation time.The data observed for twenty four hours is segmently calculated and analyzed for four,six and eight hours respectively,which indicated that better and shorter observation time selected can achieve similar result as that from continuously observation for twenty four hours.The influence of the selection of observation time on baseline accuracy is studied,for appropriate arrangement for repetition measurement GPS network and raising work efficiency.
【Fund】: 辽宁工程技术大学地理空间信息技术与应用实验室基金资助项目(2006012)
【CateGory Index】: U442.4
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