信号处理2025，Vol.41Issue(8)：1373-1381,9.DOI:10.12466/xhcl.2025.08.006
基于GB-SAR的北斗面形变测量雷达精度评估方法
Accuracy Evaluation Method for GB-SAR-Based Beidou Surface Deformation Measurement Radar
摘要
Abstract
Before geological disasters occur,the ground surface typically experiences minor displacements that can pro-vide early warning signals.Consequently,high-precision real-time 3D deformation monitoring of high-risk areas is criti-cally required for effective geological-disaster early warning.The Beidou surface deformation measurement radar is a new type of surface deformation monitoring technology that can be applied to multiple scenarios such as slope monitoring,mining area settlement,and bridge deformation.It offers the advantages of wide coverage and low cost.It is capable of achieving 3D deformation monitoring of an entire scene using a single receiver,which can be stationary or mounted on a vehicle or aircraft.By leveraging in-orbit satellites as transmitters,the system significantly reduces long-term monitoring costs compared to ground-based synthetic aperture radar(GB-SAR)and spacebome interferometric synthetic aperture ra-dar(InSAR)systems.However,the low transmission power from navigation satellites to the Earth results in diminished signal-to-noise ratio(SNR)of scene echoes,leading to phase instability and reduced measurement accuracy.In this study,high-precision one-dimensional deformation data from GB-SAR were adopted as ground truth to preliminarily validate the deformation monitoring capability of the Beidou radar system.The operational workflow of the Beidou radar is systemati-cally described,with specific adaptations tailored to its technical characteristics.A cross-system accuracy evaluation meth-odology was implemented,leveraging GB-SAR deformation data as reference benchmarks.Field experiments conducted in the Laolingou area of Chongqing over a seven-day observation period yielded quantified measurement accuracy metrics for the Beidou radar system.Experimental results demonstrate the competence of the system in full-scene 3D deformation monitoring,highlighting its potential for broad applications in disaster prediction scenarios across diverse environments.关键词
干涉合成孔径雷达/北斗面形变测量雷达/地基合成孔径雷达/精度评估Key words
interferometric synthetic aperture radar/Beidou surface deformation measurement radar/ground-based synthetic aperture radar/accuracy evaluation分类
信息技术与安全科学引用本文复制引用
刘飞峰,崔荣壹,王战泽,徐智祥,曾熙玥,钟帅臻..基于GB-SAR的北斗面形变测量雷达精度评估方法[J].信号处理,2025,41(8):1373-1381,9.基金项目
国家重点研发计划(2021YFB3901400)National Key Research and Development Program of China(2021YFB3901400) （2021YFB3901400）
