永久散射体点目标提取方法研究OA北大核心CSCDCSTPCD

The recognition and selection of high-coherence PS points is a premise that guarantees the high-precision of permanent scatterers. The characteristics and flaws of all kinds of selection methods, such as amplitude stability, phase stability, timing sequence correlation and amplitude dispersion index threshold were analyzed. The recognition strategy of PS points is brought forward based on the union and intersection of time sequence correlation coefficient threshold and amplitude dispersion index threshold. The basic principle of point target check method is expounded and the corresponding model is given, in addition, its effectiveness and superiority is verified.