Performance study of GPS/BDS/GLONASS integrated single frequency RTK in complex urban environments
MA Dan1， XU Ying2， LU Yang3， WU Hao2， MAO Yanling1， WANG Ce2
1.Fujian Provincial Key Laboratory of Soil Environmental Health and Regulation， College of Resources and Environment， Fujian Agriculture and Forestry University， Fuzhou 350002；2.College of Geometics， Shandong University of Science and Technology， Qingdao， Shandong 266590；3.Computer and Technologies Holdings Limited， Hongkong 999077
Abstract：Focusing on performance of GPS＋BDS＋GLONASS single-frequency RTK in complex urban areas， GNSS were observed at one reference station and seven rover stations in HongKong. The LAMBDA method and R-ratio test were used for ambiguity resolution. The positioning performances of seven single-frequency RTK choices (GPS alone， GLONASS alone， BDS alone， GPS＋GLONASS， GPS＋BDS， BDS＋GLONASS， and GPS＋BDS＋GLONASS) were evaluated in complex urban environments. The results show that：1) Positioning precisions for single frequency RTK are able to reach centimeters level under good observation conditions. The best performance is obtained from the single-frequency RTK by using GPS＋GLONASS＋BDS compared with the other choices， followed by dual-systems， and worst for single-system. 2) Under relatively inferior observation conditions， some single-system single-frequency RTK can hardly implement positioning successfully. Generally， the positioning accuracy of dual-system is higher than single-systems. The positioning accuracy of GLONAS＋BDS is the worst among all dual-systems. But single-system and dual-system are not capable of positioning at high precision level. 3) Positioning accuracy of multiple system single-frequency RTK reaches centimeter level and would be widely used in urban navigation of high accuracy. 4) Positioning accuracy of seven GNSS mode is obviously correlated positively with observation conditions.
2017, Vol. 51 
