福建省高精度水平速度场模型构建与评估  

Construction and evaluation of high precision horizontal velocity field model in Fujian province

作　　者：杜仲进 DU Zhongjin(Fujian Surveying and Mapping Institute,Fuzhou 350003,China)

机构地区：[1]福建省测绘院,福州350003

出　　处：《导航定位学报》2020年第5期57-62,75,共7页Journal of Navigation and Positioning

基　　金：福建省工业引导性(重点)资助项目(2019H0044)。

摘　　要：为了提高中国大陆沿海区域速度场模型的现势性、高精度性与简便性,以福建省为例,研究构建区域高精度速度场模型:利用福建省及周边区域75个连续运行参考站(CORS)站近7 a的全球定位系统(GPS)观测数据,基于GAMIT/GLOBK解算得到福建省区域的高精度水平速度场;并利用区域欧拉矢量运动模型与基于德洛奈(Delaunay)三角网的反距离加权格网模型构建区域速度场。结果表明:福建省及周边区域地壳内部结构稳定,整体呈现由西北至东南方向的运动趋势,整体平均速度为东方向32.8 mm/a,北方向-11.7 mm/a;2种模型水平方向速度场的检核精度均能达到1 mm/a左右,后者在考虑了距离和方位信息的同时,可以使用更少的信息刻画更为精细的局部特征,且具有较强的鲁棒性,使用更为简便。In order to improve the real-time,high accuracy and simplicity of the velocity field model in coastal areas of China's mainland,the paper studied on the construction of regional high-precision velocity field model by taking Fujian Province as an example:the high accuracy horizontal velocity field in Fujian Province was computed by using the global positioning system(GPS)observation data of 75 continuously operating reference stations(CORS)in Fujian Province and its surrounding areas for nearly seven years based on GAMIT/GLOBK;and the regional velocity field was constructed by using regional Euler vector motion model and inverse distance weighted grid model based on Delaunay triangulation.Results showed that:the internal structure of the crust in Fujian Province and its surrounding areas could be stable with an overall movement trend from northwest to southeast,and the overall average velocity was 32.8 mm/a in the east,and-11.7 mm/a in the north;moreover,the checking accuracy of the horizontal velocity field of the two models could both reach about 1 mm/a,and the latter could use less information to depict more precise local features while considering distance and azimuth information with strong robustness and easy to use.

关 键 词：区域速度场 欧拉矢量 德洛奈三角网 格网模型 

分 类 号：P228[天文地球—大地测量学与测量工程]