利用多面函数整体求解GPS应变场的方法及应用

Application and Method of GPS Strain Calculating in Whole Mode Using Multi-Surface Function

通过对位移与应变微分公式的分析,提出了利用多面函数整体解算大区域应变场的方法,给出了模拟数据的理论应变场,并对该模拟数据进行了分析。分析过程中,采用1°网格采样数据和50%限定输入数据,通过对比理论结果和计算结果,验证了文中方法的有效性。对1999～2004年中国大陆区域网GPS速度场的结果进行了分析,给出了该期间的中国大陆应变场分布,讨论了多面函数方法的特性,并给出了应变计算的建议。

By analyzing the coefficient formula between displacement and strain, the whole solving method using multi-surface function, which can calculate strain field in large region, is proposed. The theoretical strain field and calculation strain field of simulation data are given. In this simulating process, the 1 grid data and 50% constraining data are used as simulating input. By comparing the .,theoretical results and calculating results, the strain calculating method is tested effectively. Meanwhile, we analyze the GPS strain field of region network in China mainland using 1999-2004 GPS velocity fields and give the strain field distribution. The characteristic of multi-surface function method is discussed, and advice of strain calculation is given.