摘要
从全球范围分布的IGS站中选取7个测站的观测数据,利用RTKLIB、PPPH和GAMP 3种开源精密单点定位软件分别进行静态PPP(precise point positioning)和模拟动态PPP解算,解算的坐标结果与SOPAC进行比较,天顶对流层延迟(zenith tropospheric delay,ZTD)与利用BERNESE 5.0解算的5min ZTD进行比较,并分别统计了收敛时间,结果表明:(1)在静态和动态PPP中,三者水平方向RMS(root mean square)分别均优于2 cm和5 cm,在高程方向精度有一定差异。(2)利用3种软件进行静态PPP解算均可得到厘米级对流层解算精度,GAMP与RTKLIB的解算结果与BERNESE解算结果差异在1 cm左右,与PPPH的差异在2 cm左右。(3)三者解算的收敛时间相当,静态PPP中收敛时间在6~56 min之间,动态PPP中收敛时间在9~116 min之间,部分测站PPPH解算的收敛时间较长。
From the worldwide distribution of IGS stations,we selected 7 observation’s files among them,using RTKLIB,PPPH and GAMP open source software to process static PPP and dynamic simulation of PPP.The coordinates obtained are compared with SOPAC and zenith tropospheric delay(ZTD) are also compared with the 5 min ZTD results computed by BERNESE 5.0.Meanwhile,the convergence times are counted respectively.The results show that:(1)In the mode of static and dynamic PPP,the horizontal RMS of the three open source software are better than 2 cm and 5 cm respectively,and there are certain differences in the accuracy of the elevation direction.(2)The accuracy of cm level troposphere solution can be obtained by static PPP computation through these three software.The difference between GAMP and RTKLIB and BERNESE is about 1 cm,and the difference between PPPH and BERNESE is about 2 cm.(3)The convergence times of these three open source software are nearly same.In static PPP,it is among 6~56 min,and in dynamic PPP,it is among 9~116 min.But in some stations,the convergence time processed by PPPH is longer.
作者
杨震
顾和和
孟昊霆
YANG Zhen;GU Hehe;MENG Haoting(School of Environment Science and Spatial Informatics,China University of Mining and Technology,Xuzhou 221116,China;Key Laboratory of Land Environment and Disaster Monitoring of SBSM,China University of Mining and Technology,Xuzhou 221116,China)
出处
《测绘地理信息》
CSCD
2021年第6期31-35,共5页
Journal of Geomatics
关键词
精密单点定位
开源软件
定位精度
天顶对流层延迟
收敛时间
precise point positioning(PPP)
open source software
positioning accuracy
zenith tropospheric delay
convergence time
