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《Science of Surveying and Mapping》 2013-05
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Correlation of troposphere delay parameters in precise point positioning

XU Zong-qiu;XU Ai-gong;GAO Yang;XU Xin-chao;School of Geomatics,Liaoning Technical University;Department of Geomatics Engineering,University of Calgary;  
In order to determine the autocorrelation of tropospheric delay parameters and the cross-correlation between the tropospheric delay parameters and the coordinate parameters,stochastic Kalman filter was used to process the data in precision point positioning in the paper. Autocorrelation functions of tropospheric zenith delay errors were calculated according to the autocorrelation principles. Four kinds of empirical function models were tested respectively to fit to the autocorrelation functions,the results showed that the exponential-cos could be the best fitting model. Cross-Correlation analysis was conducted on the errors of tropospheric zenith delay and coordinate vertical component,the results showed that they are significant negative linear correlation. The fluctuation amplitude of errors in coordinate vertical component is about 4 times than that in tropospheric zenith delay. The lower cutoff elevation angle results in the stronger correlation of the parameters.
【Fund】: 辽宁省高等学校优秀人才支持计划资助(LR201018);; 辽宁省自然科学基金资助(201102087);; 国家测绘局测绘基础研究基金资助项目(10-01-03);; 精密工程与工业测量国家测绘地理信息局重点实验室开放基金项目(PF2012-81);; 地理空间信息工程国家测绘地理信息局重点实验室开放研究基金项目(201307)
【CateGory Index】: P228.4
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