Trimble RTX-PP在长江中游河段静态数据解算中的精度分析  

Static data accuracy analysis of Trimble RTX-PP in middle reaches of Yangtze River

作　　者：付强 王超 黎鹏 FU Qiang;WANG Chao;LI Peng(Middle Changjiang River Bureau of Hydrology and Water Resources Survey,Bureau of Hydrology,Changjiang Water Resources Com-mission,Wuhan 430012,China)

机构地区：[1]长江水利委员会水文局长江中游水文水资源勘测局,湖北武汉430012

出　　处：《水利水电快报》2022年第7期62-65,77,共5页Express Water Resources & Hydropower Information

摘　　要：为了解决在没有足够测绘基础设施地区的施测问题,在长江中游河段河道勘测中,使用Trimble RTX-PP服务获得了在ITRF2014框架下当前历元的解算结果。与高精度GNSS数据分析软件GAMIT/GLOBK的解算结果进行对比分析,以评定RTX-PP的绝对定位精度;研究了RTX-PP直接获取CGCS2000坐标的计算精度。结果表明:在24 h的观测时长下,RTX-PP的定位精度优于1 cm;重新应用速度场模型后的坐标精度高于RTX-PP直接提供的CGCS2000坐标精度。RTX-PP与实际CGCS2000坐标成果疑似具有系统误差的特征,有待进一步的实验验证。To solve the problem of surveying in the area without sufficient facilities,the calculation results of current Ephemeris in the middle reaches of Yangtze River under the framework of ITRF2014 were obtained by using Trim-ble RTX-PP service and the absolute positioning accuracy of RTX-PP was compared with the results calculated by high-accuracy GNSS data analysis software GAMIT/GLOBK to evaluate the absolute accuracy.The coordinate calculation accuracy of CGCS2000 directly acquired by RTX-PP were further investigated.The results showed that the positioning accuracy of RTX-PP was within 1 cm in the observation duration of 24 h;by reapplying the velocity field model,the coordinates were more accurate than the CGCS2000 coordinates directly provided by RTXPP.It was inferred that the errors of RTX-PP and the actual CGCS2000 coordinate results may be systematic errors,which should be verified by further experiments.

关 键 词：工程测量 Trimble RTX GAMIT/GLOBK CGCS2000 坐标转换 速度场 定位精度 长江中游 

分 类 号：P228.4[天文地球—大地测量学与测量工程]