Joint Accuracy Evaluation Method Of Multiple Scenarios For GNSS-based InSAR System

GNSS-based InSAR system utilizes navigation satellites and PS-InSAR to monitor surface deformation, which is a flexible, efficient and high-precision method. When measuring deformation in a single scene, the system can obtain high-precision measurement results. When measuring deformation in multiple scenes with a large range, due to the relativity of the measurement in a single scene, directly fusing the single-scene measurement results leads to erroneous evaluation accuracy. This paper introduces a calibrator dedicated to GNSS-based InSAR system. The calibrator is composed of a navigation signal transponder and a GNSS signal receiver rigidly connected. The measurement results can be obtained through signal transponder, and the real deformation at target points can be obtained through GNSS signal receiver. It can improve the accuracy of deformation measurement using measurement results and real deformation.