摘要
GAMIT/GLOBK与PANDA都是国际知名的GPS精密数据处理软件。当GAMIT/GLOBK采用精密星历和高精度起算点时,其解算长基线的相对精度能达到10-9量级,解算短基线的精度能优于1 mm;使用PANDA进行北斗卫星精密定轨的径向精度优于10 cm,静态精密单点定位精度达到厘米级、基线相对定位达到毫米级。但两者基于不同的处理方法,GAMIT/GLOBK基于双差模式而PANDA采用非差模式。以IGS公布的周解为真值利用GPS实测数据对两者定位结果和精度予以比较,从而对其定位性能进行分析,实验结果表明:GAMIT/GLOBK与PANDA解算的模式不同,但两者的实际解算精度基本相当,且成果与IGS公布的周解吻合较好,最终解算结果都与IGS公布的坐标吻合较好。
Both PANDA and GAMIT/GLOBK are world-renowned software for processing GPS precision data.When GAMIT/GLOBK uses precise ephemeris and high-precision starting point,the relative accuracy of long baseline can reach 10-9 orders of magnitude and the accuracy of short baseline calculation is better than 1 mm;the radial accuracy of precise orbit determination of Beidou satellite using PANDA is better than 10 cm,the static precise single point positioning accuracy reaches centimeter level,and the baseline relative positioning accuracy reaches millimeter level.But both are based on different approaches,with PANDA using non-differential mode and GAMIT based on double-differential mode.In this paper,the measured data are used to compare the positioning results and the accuracy of the two,the experimental results show that the performance of the two methods is equivalent.The final results of both are in good agreement with the published data of IGS.
作者
翟文博
ZHAI Wen-bo(China Railway Design Corporation,Tianjin 300251,China)
出处
《现代测绘》
2019年第5期36-39,共4页
Modern Surveying and Mapping
基金
中国铁路设计集团有限公司测绘地理信息研究院科研项目(721887).
作者简介
第一作者:翟文博,工程师,研究方向为GPS数据处理与电离层反演。
