利用陆态网络参考站建立中国大陆水平运动速度场

Construction of Chinese mainland castal horizontal movement velocity field based on CMONOC stations

利用陆态网络260个基准站2011年至2015年连续观测数据和2000个区域站多期观测数据,通过“稀释分区”法与全球分布的约50个ITRF参考站构建全球网进行单日松弛解解算,经去约束、合并成周解得到对准于ITRF2014框架下的坐标时间序列,在去粗差、偏差,拟合季节性信号后获得参考站在历元2015.0的坐标和速度。经过速度验证后,利用2307个陆态网络参考站通过局域欧拉矢量法和格网法分别建立了我国大陆水平运动速度场模型,局域欧拉矢量法建立的速度场模型在X、Y、Z方向误差统计值分别为±1.380mm/a、±0.849mm/a和±1.058mm/a,2^0×2^0速度格网的误差统计值分别为1.73mm/a、0.93mm/a和1.29mm/a。

In this paper,the observations of 260 fiducial reference stations from 2011 te 2015 and multi-period observations of about 2000 reaional stations of the Crustal Movement Observation Network of China(CMONOC)are used te construct the global network using the"dilution partition"method combined with about 50 ITRF reference points to calculate the daily relax solution.The coordinate time series in ITRF2014 are obtained by removing constrains and merging weekly solutions.The coordinates and velocities of the reference stations at epoch 2015.0 are obtained by removing gross errors,deviations and fitting seasonal noises.Based on the velocity verification,the horizontal velocity field models of Chinese continent are established with the velocities of 2307 reference stations using the local Euler vector method and the grid method.The statistical errors of the velocita field models established by the local Euler vector in the direction of X,Y and Z are ±1.380,±0.849 and ±1.058 mm/a,respectively,and those of the grid model are ±1.73,±0.93 and ±1.29 mm/a respectivety.