高分三号聚束模式数据在城市洪水灾害应急中的应用  

Application of GF-3 Spotlight Mode Data in Urban Flood Disaster Emergency Response

作　　者：林熙 罗鼎 连蓉 魏文杰 LIN Xi;LUO Ding;LIAN Rong;WEI Wenjie(Chongqing Geographic and Remote Sensing Center,Chongqing 401147,China;High-resolution Earth Observation System Chongqing Data and Application Center,Chongqing 401147,China)

机构地区：[1]重庆市地理信息和遥感应用中心,重庆401147 [2]高分辨率对地观测系统重庆数据与应用中心,重庆401147

出　　处：《地理空间信息》2022年第10期1-4,共4页Geospatial Information

基　　金：重庆市自然科学基金面上项目(cstc2021jcyj-msxmX1203)。

摘　　要：高分三号卫星是我国首颗C频段多极化高分辨率合成孔径雷达卫星,其聚束模式图像分辨率最高可达1 m。针对高分三号聚束模式数据在城区水面回波信号受干扰较多的问题,使用面向对象的方法并结合DEM高程数据,提取了2020年重庆820特大洪水朝天门区域洪水范围,并通过无人机航拍数据对提取结果进行了验证。实验表明,高分三号聚束模式数据的高分辨率以及迅速响应特征,在洪水应急应用中具有较大的应用潜力。The GF-3 satellite is my country’s first C-band multi-polarization high-resolution synthetic aperture radar satellite.Its spotlight mode image resolution can reach up to 1 m.Aiming at the problem that the data from spotlight mode of GF-3 is more interfered with in the urban water surface echo signal,we used the object-oriented method and combined the DEM elevation data to extract the flood range of Chaotianmen area in Chongqing City in a catastrophic flood of 2020,and used UAV aerial photography data to verify the extraction results.Experimental results show that the high-resolution and rapid response characteristics of GF-3spotlight mode data have great application potential in flood emergency applica-tions.

关 键 词：高分三号 聚束模式 SAR 洪水 应急 

分 类 号：P237[天文地球—摄影测量与遥感]