基于GNSS实时数据流的载波相位差分测速方法及精度评估  

Time-differenced Carrier Phase velocity measurement method and accuracy evaluation based on GNSS real-time data stream

作　　者：胡冰燕 吕黄晖 郑佳伟 方荣新[2] HU Bingyan;LYU Huanghui;ZHENG Jiawei;FANG Rongxin(School of Geodesy and Geomatics,Wuhan University,Wuhan 430079,China;GNSS Research Center,Wuhan University,Wuhan 430079,China)

机构地区：[1]武汉大学测绘学院,武汉430079 [2]武汉大学卫星导航定位技术研究中心,武汉430079

出　　处：《全球定位系统》2023年第2期65-70,共6页Gnss World of China

基　　金：国家自然科学基金(42274025)。

摘　　要：为了满足地质灾害实时高精度监测应用需求,对常规全球卫星导航系统(GNSS)载波相位差分测速事后处理软件进行改进,增加了实时数据流接收和实时解码国际海运事业无线电技术委员会(RTCM)的功能,实现了真正的GNSS载波相位差分测速.利用静态站和振动台模拟正弦波振动实验的GNSS数据,评估改进后GNSS实时测速程序的精度.静态模拟动态的测速精度误差均方根(RMS)优于5 mm/s;振动台动态实验解算结果与振动台输出真值的互差RMS为10.4 mm/s.说明本实验的实时GNSS测速程序在静态实时测速条件下的测速精度可达到mm/s级,在实时动态条件下测速精度仍能达到cm/s级.In order to meet the real-time and accurate monitoring and early warning of geological disasters,and in view of the fact that the traditional GNSS carrier phase difference speed measurement mainly adopts the post-event simulation real-time processing mode,the post-event GNSS carrier phase difference speed measurement program is improved.Added the function of real-time data stream reception and real-time decoding of the RTCM to meet the needs of real-time speed measurement.Use the static station experiment and the shaking table to simulate the sine wave vibration experiment to evaluate the accuracy of the improved GNSS real-time speed measurement program.The root mean square(RMS)of the error in NEU directions in the static experiment is better than 5 mm/s;the RMS difference between the calculated speed in NEU directions and the true value in the dynamic experiment is 10.4 mm/s.It shows that the speed measurement accuracy of the real-time GNSS speed measurement program in this experiment can reach millimeter level under static real-time speed measurement conditions,and the speed measurement accuracy can still reach centimeter level under real-time dynamic conditions.

关 键 词：实时数据流 载波相位差分 测速 精度评估 

分 类 号：P228.4[天文地球—大地测量学与测量工程]