The Y axis in Figure 11 is the degree of the correlation between two points. The result showsthat the correlation of point 1 and point 2 is strong, and it attenuates significantly with theincrease of distance between simulation points. For point 1 and point 2, the coherence valueat time 0 can reach 0.7. However, for point 1 and point 33, as they are located 1,280 m awayfrom each other, their maximum correlation value is reduced to about 0.2, which is quiteindistinctive. In addition, as is presented in Figure 11, the correlations of the proposedmethod are in good agreement with the target