基于ITRF2008的NNR-MORVEL56的全球板块运动参数求解

Calculation of NNR-MORVEL56 Plate Motion Parameters Based on ITRF2008

基于最新的、较为完善的板块边界模型——NNR-MORVEL56的划分边界,利用ITRF2008的数据解建立实测板块运动模型ITRF2008VEL,对NNR-MORVEL56的部分板块欧拉参数进行求解,并给出误差估计;在此基础上,以NNR-MORVEL56模型的欧拉参数为初始值,利用其理论速度与实测速度差值,求参数改正数,进而迭代求出参数最优解,并与ITRF2008VEL、NNR-MORVEL56进行比较;结果表明,迭代最优解在精度上优于ITRF2008VEL,且三种模型在整体上有一定的一致性,但也存在部分差异;此外,虽然利用ITRF2008的数据可以解算部分NNR-MORVEL56的板块欧拉参数,但仍有局限性。

Based on the latest and more perfect plate boundary model-NNR-MORVEL56,this paper establishes the plate motion model ITRF2008 VEL using ITRF2008 data and obtains the Euler parameter with its error estimation of partial NNR-MORVEL56 plates.Then on this basis,NNR-MORVEL56 Euler parameters is taken as the initial values,and the parameter correction is acquired using the difference between the theoretical velocity and its measurement value.The optimal iterative solutions are calculated and compared with those of ITRF2008 VELand NNR-MORVEL56.It is showed that the optimal iterative solutions are better than ITRF2008 VEL on the accuracy,and on the whole,three models have certain consistency,but some differences still exist.Moreover,though the ITRF2008 data can be used to calculate the Euler parameter of partial NNR-MORVEL56 plates,some limit is revealed.