基于CORS的网络RTK在山区的定位精度分析

Analysis of network RTK positioning accuracy based on CORS in mountainous areas

针对省级连续运行基准站系统(CORS)下北斗三号(BDS-3)、全球定位系统(GPS)、全球卫星导航系统(GLONASS)不同星座在山区中定位精度存在差异的现象,本文通过控制变量法来评析采用不同的星座组合方式的定位精度,并选取秦岭山区某乡镇区域进行实测比对。结果表明,BDS-3/GPS/GLONASS的精度和稳定性最高,BDS-3信号的加入使得GPS/GLONASS播发系统的平面精度提高0.5 cm以上,垂直精度提高0.5~2.0 cm,中误差完全满足农房一体项目中图根控制测量的精度要求。

In response to the phenomenon of differential positioning accuracy of different constellations of BeiDou 3(BDS 3),Global Positioning System(GPS),and Global Navigation Satellite System(GLONASS)in mountainous areas under the provincial level Continuously Operating Reference Stations(CORS)system,this paper employs a controlled variable method to analyze the positioning accuracy using different constellation combinations and conducts field measurements in a rural town area in the Qinling Mountains region.The results indicate that BDS 3/GPS/GLONASS exhibits the highest accuracy and stability.The inclusion of BDS 3 signals improves the horizontal accuracy of the GPS/GLONASS broadcast system by over 0.5 cm and the vertical accuracy by 0.5 to 2.0 cm.The root mean square error completely meets the accuracy requirements for control measurements in rural real Estate Surveying Projects.