基于GNSS基准站数据的控制点CGCS2000坐标计算  

Calculation of CGCS2000 coordinates of control points based on GNSS reference station data

作　　者：张吉君 刘彦杰 包暑光 ZHANG Jijun;LIU Yanjie;BAO Shuguang(Three Gorges Geotechnical Engineering Co.,Ltd.,(Wuhan),Wuhan 430074,China)

机构地区：[1]长江三峡勘测研究院有限公司(武汉),湖北武汉430074

出　　处：《水利水电快报》2023年第11期73-78,共6页Express Water Resources & Hydropower Information

摘　　要：针对中国部分区域CGCS2000控制点坐标较难获取的问题,提出了基于公开的GNSS数据计算控制点CGCS2000坐标的方法。选用GNSS基准站进行GNSS静态测量联测,利用GAMIT/GLOBK软件进行数据处理,获取未知点当前框架和当前历元下的空间三维坐标以进行框架历元转换,并计算未知控制点的CGCS2000坐标。结果表明:采用该方法计算控制点的平面精度总体保持在3 cm以内,高程精度总体保持在5 cm以内,可用于项目前期快速获取控制点CGCS2000坐标和项目中控制点CGCS2000坐标的校核。In view of the difficulty in obtaining the coordinates of CGCS2000 control points in some regions of China,a method of calculating the coordinates of CGCS2000 control points based on the published GNSS data was proposed.GNSS reference stations were selected for GNSS static measurement and joint survey;GAMIT/GLOBK software was used to process data and obtain the spatial three-dimensional coordinates of the current frame and current epoch of the unknown point,so as to convert the frame epoch and calculate the CGCS2000 coordinates of the unknown control points.The results showed that the plane accuracy of the control points calculated by this method was mostly kept within 3 cm and the elevation accuracy was mostly kept within 5 cm,which could be used to quickly obtain the CGCS2000 coordinates of the control point in the early stage of the project and check the CGCS2000 coordinates of the control points in the project.

关 键 词：CGCS2000坐标 GAMIT/GLOBK 框架转换 历元转换 GNSS基准站 

分 类 号：P226[天文地球—大地测量学与测量工程]