【摘要】 采用PS-InSAR和SBAS-InSAR两种技术处理覆盖贵阳市的30景Sentinel-1A SAR数据,首先获取该研究区的沉降速率,其次分析沉降带分布特征及沉降原因,最后对两种处理结果进行对比分析。研究表明:该市存在不同程度的地面沉降,其主要分布在贵阳北火车站、云岩区和花溪区等区域,最大沉降速率达26 mm/a;两种技术处理结果具有较高的一致性;在建筑物密集区域,SBAS技术较为准确些,这是由于两种选点方法不同所导致。更多还原

【Abstract】 PS-InSAR and SBAS-InSAR are used to process 30 scenes of Sentinel-1 A SAR datas covering Guiyang city. Firstly,the sedimentation rate of the study area are obtained. Secondly,the distribution characteristics and settlement reasons of the settlement zone are analyzed. Finally,the two kinds of processing results are compared and analyzed. The results show that there are different degrees of land subsidence in the city,which are mainly distributed in Guiyang North railway station,Yunyan District and Huaxi District. The maximum subsidence rate is about 26 mm/a. The results of the two technologies have a high consistency. In densely building areas,the SBAS technology is more accurate,which is caused by the difference of the two methods of selecting points.更多还原