中国大陆速度场模型建立方法研究

Research on the Modeling Approach of the Velocity Field in China's Mainland

将中国大陆划分成东北、华北、华南、青藏、西北5个块体,基于克里金插值法、最小二乘配置法、最小二乘配置移动拟合推估法等3种方法及速度场数据研究中国大陆速度场模型建立方法。利用外检点分析不同建模方法的精度情况,最小二乘配置法在大部分块体(华北、华南、东北块体)的拟合精度都较高,表现稳定;克里金插值法在青藏、华北块体的拟合精度较高。利用克里金插值法与最小二乘配置法获取中国大陆1°×1°格网中心点速度场成果,两种方法成果差异较小。

With the fast rise in the number of GPS continuous operational reference system（CORS）stations in China,and geodesy and geodynamics subjects growing on the basis of geographic information needs,it is imperative to establish a high precision velocity model in China.China＇s mainland is divided into five blocks：Northeast China,North China,South China,Qingzang（Tibet）and Northwest China.The study is performed on construction of the velocity field model in China＇s mainland on the basis of three methods：Kriging interpolation,higher collocation precision in the blocks of Qingzang and North China,and the performance of the movable least squares collocation method.The latter is worse than other methods in all blocks.Finally,we apply configuration using Kriging interpolation and least squares collocation to estimate the 1°×1°center of grid velocity results.The resulting difference of the two methods is small.