北斗应用于高铁CPI控制测量的算法与试验研究

Algorithm and experiment of applying BDS to constructing CPI control network of high speed railway

针对高速铁路CPI控制网,对北斗/GPS系统的单独与联合基线解算模型进行研究,开发北斗/GPS基线处理软件,并应用于高铁控制网建设。对川藏铁路成都-雅安段CPI控制网测试的结果表明:北斗基线解算精度X,Z方向优于1mm,Y方向优于2mm;北斗重复基线较差、同步环和异步环闭合差的合格率与GPS相当;北斗无约束平差最弱边相对中误差为3.1ppm,精度与GPS基本一致;北斗CPI控制网测试各项指标均满足《高速铁路工程测量规范》要求,可用于高速铁路测量控制网的建立。

This paper discusses the independent and combined BDS/GPS baseline processing models .A corresponding software package has been developed ,which can be applied to constructing CPI and CPII control network of high speed railway .Taken Sichuan‐Xizang high speed railway as an example ,a test of constructing CPI control network in Chengdu‐Yaan section is carried out .The test results show that BDS can achieve better than 1 mm precision in X and Z direction and 2 mm precision in Y direction .BDS and GPS have the same passing rate of repeat baseline differences and synchronous and asynchronous loop closure errors .BDS weakest baseline’ s relative error from constrained adjustment results is 3.1 ppm , which is consistent with that of GPS . All assessments indicate that BDS test results satisfy the requirements of high speed railway engineering surveying specifications ,and it can work well in high speed railway control network constructing .