摘要
选用穿透性较好的长波段高分辨率卫星雷达数据,对渝怀铁路重庆彭水段沿线进行地表形变监测研究。试验在西南复杂山区低相干条件下,采用分布式散射体干涉测量技术(DS-InSAR)进行铁路沿线地表变形监测的应用效果。研究中采用了干涉目标点分析(IPTA)方法,综合使用雷达影像的频谱信息、后向散射信息和时相稳定性信息提取永久散射点(PS)和分布式散射点(DS),获取了试验研究区域地面形变时间序列。研究表明:采用PS+DS点的SqueeSAR方法,可以提取铁路沿线较高密度的监测点,表明时序InSAR监测技术,一定程度上可为运营铁路线路的安全性评价提供部分直接科学依据。
The long-wavelength high-resolution satellite radar data with good penetration is used to monitor and study the surface deformation along the Pengshui section of Chongqing-Huaihua railway. Under the condition of low coherence in the complex mountainous area of Southwest China, the DS-InSAR was used to monitor and analyze the surface deformation along the railway. This paper, combining the spectral information, backscattering information and phase stability information of the radar image, adopts the Interferometric Target Point Analysis(IPTA) method to extract the permanent scattering point(PS) and the distributed scattering point(DS), and got the time series of the ground deformation in the test area. The research shows that the SqueeSAR method with PS+DS point enables the extraction of monitoring points with higher density along the railway, indicating that to a certain extent, the sequential InSAR monitoring technology can provide some direct scientific basis for the safety evaluation of the operating railway lines.
作者
李冠楠
谭衢霖
谢酬
蔡小培
LI Guannan;TAN Qulin;XIE Chou;CAI Xiaopei(Major in Road and Railway Engineering,School of Civil Engineering,Beijing Jiaotong University,Beijing 100044,China;Institute of Track Engineering and Spatial Information Technology,Beijing Jiaotong University,Beijing 100044,China;Institute of Remote Sensing and Digital Earth,Chinese Academy of Sciences,Beijing 100094,China)
出处
《中国铁路》
2019年第2期59-65,共7页
China Railway
基金
中国铁路总公司科技研究开发计划项目(2017G002-H)
国家重点研发计划项目(2016YFB0502504)
关键词
成像雷达
INSAR
干涉测量
铁路沿线
地表形变
监测
imaging radar
InSAR
interferometry
along the railway
surface deformation
monitoring
