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《Science of Surveying and Mapping》 2017-01
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GNSS medium distances baseline RTK algorithm research taking into account of the atmospheric delay error

YUAN Hongchao;BEI Jinzhong;ZHANG Hongwen;XU Yantian;CHEN Zhen;School of Geomatics,Liaoning Technical University;Chinese Academy of Surveying and Mapping;Heilongjiang Administration of Surveying Mapping and Geoinformation;  
The problem of the conventional RTK operation distance is not more than 15 KM,In this paper,a new algorithm of RTK,which takes into account the atmospheric delay errorwas proposed,which breaks the conventional RTK operating distance.In the medium distances baseline,the distance-dependent errors such asionospheric delay error,tropospheric delay errors,etc.,spatial correlation of which is greatly reduced with increasing the baseline length,thereby affecting the rapid solution of ambiguity.Therefore,the impact of these errors should be considered in themedium distance baseline model.This report is based on the Kalman filter algorithm by using non-combined differential positioning model,and estimating the ionospheric delay error with a weighted ionosphere model.Regarding to tropospheric delay the report consider relative tropospheric delay parameter estimation and absolute zenith troposphere parameter estimation.Final we use measured data prove the algorithm algorithm verification and analysis of results.Test results show that:the algorithm can achieve fast solution in medium distance baseline RTK,and estimate the relative tropospheric delay,the absolute zenith troposphere parameter estimation is not conducive to the base station and rover tropospheric delay separation,generally by using rover relative tropospheric delay to estimate.
【Fund】: 科技部科技支撑计划项目(2012BAB16B01);科技部863计划项目(2013AA122501 2015AA124001);; 国家自然科学基金项目(41304030 41504010);; 北斗分析中心(GFZX0301040308-06);; 四川测绘地理信息局科技支撑项目(J2014ZC01、J2015ZC01)
【CateGory Index】: P228.4
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