北斗导航系统在区域速度场的应用与分析

摘要

The differences of the positioning accuracy and velocity field of BDS and GPS are analyzed by making use of GAMIT/GLOBK software based on the continuous observation data of 12 Hong Kong CORS stations from 2016 to 2018, and the ability of BDS in monitoring crustal movement is discussed.The result shows that for the positioning accuracy of the two systems, the difference value in the horizontal direction is superior to 6mm, and that in the vertical direction is superior than 8mm.The difference of the velocity field in horizontal direction is about 1-2 mm/a, and that in the vertical direction is about 0-1mm/a.In general, BDS can be applied to monitor the regional crustal movement with relatively large deformation quantity.%基于2016—2018年12个香港CORS站的BDS和GPS连续观测数据,利用GAMIT/GLOBK软件对比分析了2种系统的定位精度和速度场差异,并探讨了BDS在地壳运动监测中的能力.结果显示,2种系统的定位精度在水平方向差值优于6mm,在垂直方向差值优于8mm;速度场水平方向的差异约为1～2mm/a,垂直方向上的差异约为0～1mm/a.总体来看,北斗导航系统能够应用于监测形变量较大的地区地壳运动.