Deformation Monitoring Experiment and Data Analysis of Beidou Surface Deformation Measuring Radar and GBSAR

The Beidou surface deformation measuring radar can realize the three-dimensional deformation measurement of the whole scene by using a single receiver. Since the system uses an in-orbit satellite as a transmitter, its long-term measurement costs are much lower than GBSAR and space-borne InSAR systems. However, due to the small power of navigation star to earth, the signal to noise ratio of scene echo is low. Based on the comparison between the high precision GBSAR one-dimensional deformation measurement data and the deformation measurement results of the Beidou surface deformation measurement radar repeater, this paper initially verifies the deformation measurement capability of the Beidou surface deformation measurement radar. This paper first introduces the Beidou surface deformation measuring radar, and then lists the PS processing flow of the Beidou surface deformation measuring radar according to the characteristics of the system. Finally, a multi-system joint verification experiment is carried out in Zhujiawan area of Chongqing, and a cross-system measurement accuracy verification method is proposed. Based on the three days’ measurement results, it is proved that GBSAR and Beidou surface deformation measurement radar have the same measurement results, and the three-dimensional deformation measurement results of the strong scattering point are consistent with the actual situation. The experiment proves that the Beidou surface deformation measuring radar has the ability to measure the three-dimensional deformation of the whole scene and can be widely used in disaster prediction.