InSAR (Interferometric Synthetic Aperture Radar) vertical deformation resolving method

The invention discloses an InSAR (Interferometric Synthetic Aperture Radar) vertical deformation resolving method. The method comprises the following steps of: acquiring SAR images, DEM (Digital Elevation Model) data and near-infrared precipitable vapor products of two tracks; carrying out multi-view, cutting and other preprocessing on the SAR image to obtain two track SAR image subsets covering the overlapping area; carrying out cloud pollution pixel elimination, filling and cutting on the near-infrared reducible vapor product to obtain a reducible vapor product subset; differential interference processing is carried out on the SAR images of the two tracks, and radar sight line direction deformation of the two tracks is obtained; calculating the troposphere slope distance atmospheric delay by using a rainfall steam product; troposphere slant range atmospheric delay is removed from the two orbit radar sight line deformation; and finally, obtaining the vertical deformation of the ground point of the overlapped