BDS在城市轨道交通工程控制网测量中的应用实践

Application of BDS in Urban Rail Transit Engineering Control Network Survey

我国城市轨道交通控制网普遍采用GPS定位测量技术,随着我国北斗三号卫星导航系统组网完成后,已全面应用于精密工程测量、精密导航等领域。为了探索BDS在城市轨道交通控制网测量应用的可行性,需要对比其实测精度。以沈阳地铁1号线东延线工程控制网测量项目为实践,分别采用BDS和GPS进行基线解算和平差分析。通过与GPS控制网测量精度进行比对分析,实践结果表明BDS测量成果可靠有效,BDS+GPS的PDOP显著降低,同等精度的观测时间显著缩短,北斗三号卫星导航系统对于摆脱长期以来对GPS的依赖性有重要意义。

GPS positioning survey technology is widely used in urban rail transit control network in China.With the completion of Beidou-3 satellite navigation system networking,it has been widely used in precision engineering survey,precision navigation and other fields.In order to explore the feasibility of BDS application in urban rail transit control network survey,it is necessary to compare the actual survey accuracy.Taking the control network survey project of East Extension Line of Shenyang Metro Line 1 as a practice,BDS and GPS are respectively used for baseline calculation and peace analysis.Through comparison and analysis with the measurement accuracy of GPS control network,the practical results show that the BDS measurement results are reliable and effective,and the accuracy is better than GPS.The Beidou-3 satellite navigation system is of great significance to get rid of the dependence on GPS for a long time.