CGline精密单点定位解算服务获取CGCS2000坐标精度分析  

Accuracy analysis of the obtained CGCS2000 coordinates through CGline precise point positioning service

作　　者：李宗勋 Li Zongxun(Shanghai Urban Construction Design&Research Institute(Group)Co.,Ltd.,Shanghai 200125,China)

机构地区：[1]上海市城市建设设计研究总院(集团)有限公司,上海200125

出　　处：《工程勘察》2025年第5期78-82,共5页Geotechnical Investigation & Surveying

摘　　要：目前流行的在线数据处理系统主要以国外为主,并不能直接获取国内项目建设所需的2000国家大地坐标。本文介绍了华测CGline高精度GNSS数据处理服务平台的基本功能,并对平台精密单点定位解算精度进行分析。试验结果表明,平台的精密单点定位服务在4h以上即可收敛到5cm以内。另外,对直接获取的2000国家大地坐标系(CGCS2000)坐标进行对比分析,结果表明,直接获取的坐标精度优于利用不同速度场模型计算获取的CGCS2000坐标,利用4h以上的观测数据计算得到的投影平面坐标精度优于2cm。在实际应用中可以直接利用华测CGline精密单点定位解算服务获取CGCS2000坐标,从而作为卫星定位测量D级及以下控制网的起算点。本文可为未来华测CGline平台的精密单点定位解算服务应用提供借鉴。This paper summarizes the current status of online data processing systems,introduces the basic functions of the Huace CGline high-precision GNSS data processing service platform,and analyzes the precision of the platform′s PPP solution.The experimental results show that the platform′s PPP service can converge to within 5 centimeters in only 4 hours or above.In addition,a comparative analysis was conducted and the results show that the accuracy of the directly obtained coordinates was better than that of the CGCS2000 coordinates obtained using different velocity field models.The accuracy of the projected coordinates calculated using more than 4 hours of observation data was better than 5 centimeters.In practical applications,the CGCS2000 coordinates can be directly obtained using the Huace CGline PPP solution service,which can be used as a starting point for satellite positioning measurement of D-level or below control networks.It provides reference for the future application of PPP solution services on the Huace CGline platform.

关 键 词：CGline 精密单点定位 CGCS2000坐标 控制网 

分 类 号：P228[天文地球—大地测量学与测量工程]