基于北斗系统的轨道交通首级控制网解算  

Solution of the First Level Control Network of Rail Transit Based on Beidou System

作　　者：金鸿 JIN Hong(State Key Laboratory of Rail Transit Engineering Informatization(FSDI),Xi'an 710043,China)

机构地区：[1]轨道交通工程信息化国家重点实验室(中铁一院),陕西西安710043

出　　处：《地理信息世界》2021年第1期109-112,共4页Geomatics World

摘　　要：针对我国自主研发的北斗全球卫星导航系统定位精度实际工程应用问题,提出了一种格网平均值方法快速获得厘米级的CGCS2000坐标。采用GAMIT10.71版本软件包解算北斗系统数据,测试北斗二号和北斗三号解算基线精度,结果显示北斗系统基线相对精度达到10-9级别。基于实际轨道交通首级控制网解算北斗系统数据结果表明,利用格网平均值法获取的速度场计算坐标转换可以达到厘米级别的精度,若能获取更准确的速度,完全可以实现ITRF2008到CGCS2000坐标厘米级别转换。To solve the practical engineering application problem of positioning accuracy of Beidou global satellite navigation system developed independently in China,a grid average method is proposed to obtain cm CGCS2000 coordinates quickly.By using the GAMIT10.71 version software package to calculate the Beidou system data,the baseline accuracy of Beidou 2 and Beidou 3 is tested.The results show that the relative accuracy of Beidou system baseline reaches 10-9 levels.The results of computing Beidou system data based on the first level control network of actual rail transit show that the coordinate conversion of velocity field obtained by grid mean value method can achieve the accuracy of cm level,and if the speed can be obtained more accurately,ITRF2008 to CGCS2000 coordinate level conversion can be realized.

关 键 词：北斗系统 首级控制网 CGCS2000 坐标转换 速度场 

分 类 号：P221[天文地球—大地测量学与测量工程]