Abstract: Due to the effect of temporal decorrelation, spatial decorrelation and atmospheric disturbance, conventional InSAR technology is severely limited in deformation monitoring. However, some new technologies developed nowadays, such as CRInSAR and PSInSAR, are not restricted by these factors. They could greatly improve the precision of InSAR technology in deformation monitoring, especially in subtle deformation monitoring. This paper analyzes the limitations of conventional InSAR technology at first, and then introduces the basic conception of CR and PS and their research development. By applying the PSInSAR algorithm, we illustrate the necessity and advantage of combined calculation of CR and PS, and propose the algorithm.

Key words: High-Coherence-Scatterer, Corner-Reflector, CRInSAR, PSInSAR, Combined Calculation