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《Geomatics and Information Science of Wuhan University》 2018-01
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Multi-GNSS Satellites Clock Estimation and Analysis

QU Lizhong;DU Mingyi;WANG Jiang;ZHAO Qile;GUO Jing;School of Geomatics and Urban Spatial Information,Beijing University of Civil Engineering and Architecture;Beijing Key Laboratory for Architectural Heritage Fine Recon Struction & Health Monition,Beijing University of Civil Engineering and Architeeture;GNSS Research Center,Wuhan University;  
By improving the satellites clock offsets estimation method with epoch-differenced phase and un-differenced pseudo-range observations,we realize the estimation of GPS,GLONASS,BDS,and Galileo satellites clock offsets.Moreover 50 GNSS stations distributed worldwide were used to acquire multi-GNSS satellites clock offsets.Their precisions were analyzed.PPP was used to validate the estimated satellite clock offsets.The experimental results illustrate that the biases between satellites clock offsets as estimated and the final multi-GNSS precise satellites clock offsets generated using PANDA software package of Wuhan University were less than 0.2 ns.The PPP results using the estimated satellites clock offsets were close to the results estimated using the final multi-GNSS satellites clock offsets generated with the Wuhan University PANDA software.
【Fund】: 国家自然科学基金(41374034);; 国家863计划(2014AA123101);; 国际GNSS检测评估项目(iGMAS);; 中央高校基本科研业务费专项资金(2042014gf026)~~
【CateGory Index】: P228.4
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