Monitoring Ground Subsidence Along the Shanghai Maglev Zone Using TerraSAR-X Images
Monitoring Ground Subsidence Along the Shanghai Maglev Zone Using TerraSAR-X Images
复制标题
DOI：
10.1109/lgrs.2016.2628867
复制
发表时间：
2017
影响因子：
4.8
通讯作者：
Jicang Wu;Fengming Hu
中科院分区：
文献类型：
--
作者：
Jicang Wu;Fengming Hu
本文利用X波段TerraSAR-X图像，应用永久散射体干涉合成孔径雷达（PS-InSAR）方法提取地面沉降。选取上海磁悬浮列车两侧1 km宽的区域，对所有永久散射体或高相干目标进行地面沉降速率计算。结果表明，磁悬浮列车轨道上分布有永久性散射点，这些永久性散射点的沉降速率大多小于3 mm/a。通过KS检验，验证了PS-InSAR测量结果与水准测量结果的一致性，表明PS-InSAR测量结果在统计上是可以接受的。此外，PS-InSAR观测结果显示，磁悬浮轨道附近存在地面沉降槽，沉降速率大于10 mm/a。
In this letter, the permanent scatterer interferometric synthetic aperture radar (PS-InSAR) method is applied to extract ground subsidence using X-band TerraSAR-X images. A zone of 1 km width on both sides of the Shanghai maglev was selected, and the ground subsidence rates were obtained on all permanent scatters or highly coherent targets. The results show that permanent scatters are distributed on the rail of the maglev, and the subsidence rates of these PS points are mostly less than 3 mm/a. A KS-test is formulated to judge the agreements between the subsidence results obtained by PS-InSAR and those obtained by spirit leveling, which indicated that PS-InSAR results are acceptable statistically. In addition, the PS-InSAR results show some ground subsiding troughs near the maglev track, with subsidence rates of more than 10 mm/a.