摘要
随着城市建设进程的加快及地质因素影响,地面沉降研究成为城市安全的热点问题之一。为探讨时序InSAR技术应用在城市安全监测领域的可行性,本文研究了SBAS技术在城市地面沉降中的应用。在阐述SBAS技术原理和探讨SBAS技术数据处理流程的基础上,利用15景2017年Sentinel-1A影像数据,反演南京市地面沉降,并分析其精度。通过与南京市CORS站沉降数据的对比分析,SBAS技术反演结果与CORS站沉降量最大差值为2.9 mm,最小差值为-0.6 mm,均方根误差为1.74 mm,两者沉降变化量基本相符,证明了SBAS方法能有效监测地面沉降,这对城市安全监测与保护具有极大参考意义。
With the acceleration of urban construction and the influence of geological factors,the study of land subsidence has become one of the hot issues of urban security.In order to explore the feasibility of the application of time series InSAR technology in the field of urban safety monitoring,the application of SBAS technology in urban ground subsidence is studied.Based on elaborating the technical principle of SBAS and discussing the process of SBAS technical data,the Sentinel-1 A image data of 15 scapes in 2017 is used to invert the ground settlement of Nanjing city,and its precision is analyzed.Through comparison and analysis with CORS station precipitation data of Nanjing,the maximum difference between the SBAS inversion results and the settlement amount of CORS station is 2.9 mm,the minimum difference is-0.6 mm,and the error of root mean square is 1.74 mm,both of which are basically consistent with each other,proving that the SBAS method can effectively monitor the ground settlement,which has great reference significance for urban safety monitoring and protection.
作者
吴学雨
赵志胜
包子宇
WU Xue-yu;ZHAO Zhi-sheng;BAO Zi-yu(College of Geomatics and Technology,Nanjing Tech University,Nanjing Jiangsu 211816,China)
出处
《现代测绘》
2019年第6期9-12,共4页
Modern Surveying and Mapping
基金
江苏自然科学基金青年项目(BK20180720).
