不同对流层映射函数模型对铁路精密控制网精度影响研究  

Research on the Influence of Different Tropospheric Mapping Function Models on the Precision of Railway Precision Control Networks

作　　者：王航 Wang Hang(China Railway First Survey and Design Institute Group Co.,Ltd.,Xi'an,China)

机构地区：[1]中铁第一勘察设计院集团有限公司,陕西西安

出　　处：《科学技术创新》2025年第4期25-29,共5页Scientific and Technological Innovation

摘　　要：针对既往铁路框架控制网解算过程中未考虑不同对流层映射函数模型对解算精度影响的问题,本研究针对某铁路框架控制网的解算过程,对三种常用的对流层投影函数模型即GMF、NMF和VMF1进行了调整,并分别从基线重复率、单天解均方根误差、天空图和高度相位图三方面进行了详尽的比较分析,以探讨不同的对流层投影函数模型对铁路精密控制网精度产生的影响。研究结果显示:综合来看,三种对流层映射函数对于铁路精密控制网精度的影响在数量级方面并未表现出显著差异。然而,在进行解算数据细微比较时,发现VMF1解算精度较NMF和GMF略高。因此,在进行基线解算时可以优先选择更适合铁路框架控制网基线解算的VMF1投影函数模型。In view of the problem that the influence of different tropospheric mapping function models on the calculation accuracy of railway frame control network was not considered in the previous calculation process,this study adjusted three commonly used tropospheric projection function models,namely GMF,NMF and VMF1,for the calculation process of a railway frame control network.In order to discuss the influence of different tropospheric projection function models on the precision of railway precision control network,we compare and analyze the baseline repetition rate,single day root mean square error,sky map and height phase map respectively.The results show that the effect of the three tropospheric mapping functions on the precision of the railway precision control network is not significantly different in terms of order of magnitude.However,in the subtle comparison of the solution data,it is found that the accuracy of VMF1 is slightly higher than that of NMF and GMF.Therefore,the VMF1 projection function model which is more suitable for the baseline calculation of railway frame control network can be chosen preferentially.

关 键 词：GMF NMF VMF1 铁路精密控制网 基线解算 

分 类 号：P228.4[天文地球—大地测量学与测量工程]