As we know that, a huge earthquake occurred in2011,in Tohoku, Japan, with magnitude of Mw9.0.This event caused almost global deformation. For example, in Japan, obvious co-seismic displacements were observed by Geo Net, as shown in the right figure. Basically, we may consider these deformations in Japan as the near-field displacements. These near-field displacements are usually used to invert fault slip distribution.