RCS Analysis Of Artificial Corner Reflectors In Tectonic Deformation Monitoring

China is a country with frequent earthquake disaster. Earthquake monitoring and prediction is at the core of protection against and mitigation of earthquake disasters. The earth’s crust before the earthquake will produce all kinds of deformation, then form crustal deformation field. In recent years, tectonic deformation measurement in the area which is prone to earthquake is an important means to forecast the earthquake.The technique of Corner Reflector Synthetic Aperture Radar Interferometry (CR-InSAR) can obtain ground deformation information with millimeter-scale accuracy. Artificial corner reflectors set up in region of prone to earthquake su ch as default which have strictly uniform number, size and specifications. CR-I nSAR realizes large-area, long-term continuous high precision deformation moni toring using CR. However, past studies focus on improving algorithm of extrac tion deformation based on CR, and for artificial corner reflector itself scatterin g properties don’t make much analysis. In fact, it is a very significant job incl uding systematic research on scattering characteristics and simulating RCS curv e of CR. The results of the analysis RCS can help choose the right type of c orner reflector and provide guidance on how to set up CR in the fields (mainl y including azimuth and incident Angle).When RCS of artificial corner reflect or achieves maximum, it is easier to recognize CR from SAR. In view of the understanding, the paper is focusing on the simulation method to RCS and test ing its reliability based SAR images.This paper introduces the common prediction method on RCS. Compared to benefits and drawbacks of different method, we hold that physical optics is most suitable for simulating RCS of artificial corner reflector. Because artificial corner reflector is electrically large target, PO is relatively appropriate algorithm. In this paper, we simulate RCS curve of several common artificial corner reflectors such as dihedral corner reflector, triangular trihedral corner reflector, rectangular trihedral corner reflector, square trihedral corner reflector, and analyze RCS change rule in different size, shape and angle.Artificial corner reflector in production, processing and layout and field of the bad natural conditions will inevitably produce shape variation, influence their scattering characteristics. Based on PO, this paper discusses RCS shrinking caused by the deviation angle, the unevenness of error and punched by the error. Through study, in the actual operation process theses error must be strictly checks.The northwest area in Beijing is located in the capital circle where surface interference conditions are good and deformation rate is stable. In this test area, there are34corner reflectors, and many ASAR scene images have obtained. Based on SAR images, trough the analysis to CR backscatter intensity with different style, and different size but same style and different stage of one CR, we verify simulation results are reliable. These conclusions provide theoretical guidance for scientific layout artificial corner reflector in test field.