扩展网络反演滤波方法及其在鲜水河断裂带上的初步实验

Extended Network Inversion Filter and Experimental Study on the Xianshuihe Fault Zone

介绍了扩展网络反演滤波方法的原理、计算处理过程及其发展,和该方法在鲜水河断裂带的初步实验情况。利用鲜水河断裂带的GPS等大地测量台站的真实点位,经简化的断层几何模型和人为设定的断层滑移对该方法进行了应用实验。实验得到的经反演复原的断层滑移和滑移速率与相应的实际值的残差平方和分别为0.13和0.18。该方法能很好地分解出各台站由断层活动所引起的位移变化,反演复原的断层滑移与给定的断层滑移较符合。随着测量资料时空密度的增加,此方法有望用于鲜水河断裂带实际大地测量资料的研究工作中。

The principle of the Extended Network Inversion Filter, calculation process, its development and the experimental study on the Xianshuihe Fault Zone are introduced in this paper. Using the real points of the GPS and geodetic survey stations set up in the Xianshuihe fault through the simplified fault geometric model and the manset fault slip an applied experiment is made to this method. The residual sums of squares of the fault slip, sliprate and the corresponding actual value are 0. 13 and 0. 18 respectively. This method can decompose the displacement variation of each station caused by the fault activity. The reversal recovery fault slip is coincident with the given fault slip. With the increase of the time-spatial density of the data, this method is hopeful to be used in the study work of actual geodetic data in Xianshuihe fault zone.