高原山区SAR影像处理关键技术与应用探讨

贵州高原山区受亚热带季风气候控制,常年阴云多雨,限制了光学遥感技术深入有效的应用和发展,合成孔径雷达技术的应用虽然摆脱了天气条件的限制,但是高原山区喀斯特地貌大量分布,地势崎岖,地块破碎,使得雷达影像阴影多且碎,对雷达信号形成镜面反射的地物,易于与阴影混淆,监测准确率低。对高原山区SAR数据进行关键技术处理,对比单一使用雷达影像和加入多光谱信息的雷达影像的效果,表明结合了多光谱信息的雷达影像可以有效避开雷达成像阴影干扰,因此合成孔径雷达遥感技术在贵州这样的特殊地区的有效应用,未来技术发展应当是结合了多源、多时相、多光谱、主、被动遥感技术的综合应用。

Research on the key technical treatment and application of SAR Images in the plateau mountain areas

The application and development of the optical remote sensing in Guizhou is limited because of subtropical monsoon climate.Synthetic aperture radar(SAR) reduces the limitation influence by the weather to some extent,but the fracture and scatter of the radar images caused by the mirror reflection ground objects.are still easy to be mixed with shadow,thus lowering the monitoring accuracy.The article is a case study on the key technical treatment of SAR images in the plateau mountain areas,which shows that the combination of the multi-spectrum radar image can effectively avoid the interference of the water shadow.The SAR application particularly in the special areas like Guizhou should be a comprehensive application of multi-sources,multi-temporal phase,multi-spectrum,and subjective and objective remote sensing.