Ground-based interferometric synthetic aperture radar and its application in monitoring typical slopes

In order to do real-time monitoring of slope movement and study the time-series displacement analysis of IBIS-L GB-InSAR, the authors designed and optimized the observation schemes and data processing methods. Landslide of Dashuchang Town, unstable slope of Shennongjia forest region, and open-pit slope of Beizhan iron mine were monitored through the technology. The glacier in the south of Beizhan tunnel was also experimentally measured. The results of GB-InSAR monitoring showed that GB-SAR devices have high observation stability under complex working conditions, and the accuracy of GB-InSAR can reach sub-millimeter level with proper observation conditions. GB-InSAR has become an important technique to monitor the slope displacement. This extends the displacement monitoring mode, making it transferring from“large-scale, wide-coverage” satellite InSAR to“small-scale, locally refined measurement”GB-InSAR. Therefore, it further enriches the understanding of slope deformation phonomenon, and lays the technical foundation for“satellite-ground”combined InSAR to monitor surface deformation process.