高铁CPⅡ控制网BDS/GPS快速测量对比试验分析  

Comparative Test and Analysis of BDS/GPS Fast Measuring for High-speed Railway CPII Control Network

作　　者：李进 冯威 潘佩芬 黄丁发 LI Jin;FENG Wei;PAN Peifen;HUANG Dingfa(Faculty of Geosciences and Environmental Engineering,Southwest Jiaotong University,Chengdu 611756,China;Institute of Computing Technology,China Academy of Railway Sciences Corporation Limited,Beijing 100081,China)

机构地区：[1]西南交通大学地球科学与环境工程学院,成都611756 [2]中国铁道科学研究院集团有限公司电子计算技术研究所,北京100081

出　　处：《铁道标准设计》2023年第3期98-103,共6页Railway Standard Design

基　　金：中国国家铁路集团有限公司科技研究开发计划重大课题(K2020X017)。

摘　　要：随着BDS-3的升空运行,GNSS多星座观测条件得到显著改善,面对新一代北斗卫星导航系统,TB 10601—2009《高速铁路工程测量规范》的控制网观测时长以及作业效率的性能有待评估分析。首先,根据单GPS、GPS+BDS卫星可见性分析全球PDOP值的变化情况;然后,推导其基线解算精度随观测时长变化的先验模型;最后,以某高铁线路CPⅡ控制网的观测数据为例,通过自编软件实现单BDS、单GPS、GPS+BDS三种模式的基线解算。结果显示,相比单GPS、GPS+BDS在我国的PDOP值能够降低0.7~1.6,且相对定位精度(观测时长约16 min)与单GPS(观测时长60 min)相当。示例结果中,GPS+BDS平面和高程方向定位精度分别为4.3 mm和10.9 mm,相比单GPS分别有54%和57%的提升。结果表明,在高铁CPⅡ控制网测量中,GPS+BDS能够将观测时长缩短为规范的34%,且满足GPS所要求的指标,并对规范修订具有一定参考价值。With the operation of BDS-3,the GNSS multi-constellation observation conditions have been significantly improved.In the face of the new generation of BDS,Code for Engineering Survey of High-speed Railway(TB 10601—2009)of the control network observation time,as well as the performance of operational efficiency are to be assessed and analyzed.First,the global PDOP values are analyzed based on single GPS and GPS+BDS satellite visibility.Then,a priori model of the variation of its baseline solution accuracy along with the observation duration is derived.Finally,with reference to the observation data of CPⅡcontrol network of a high speed railway line,the baseline solution of three modes(BDS,GPS and BDS+GPS)is realized by self-programmed software.The results show that the PDOP value of GPS+BDS in China can be reduced by 0.7~1.6 compared with that of single GPS,and the relative positioning accuracy(observation time of about 16 min)is much the same as that of single GPS(observation time of 60 min).In the example results,the GPS+BDS plane and elevation direction positioning accuracy is 4.3 mm and 10.9 mm respectively,which is 54%and 57%improvement over single GPS.The results indicate that GPS+BDS can shorten the observation time to 34%of the specification in CPⅡcontrol network measurement of high-speed railway,and meet all index requirements when using single GPS,and has certain reference value for the revision of the specification.

关 键 词：BDS PDOP值 基线解算模型 高铁控制网 观测时长 定位精度 

分 类 号：U238[交通运输工程—道路与铁道工程] P207[天文地球—测绘科学与技术]