高光谱遥感大气辐射校正技术的研究

Atmospheric Radiation Correction Technique for Hyperspectral Remote Sensing

为满足高光谱遥感图像定量化解译的需求,针对现有大气校正方法面临的大气参数不同步问题,对基于大气参数空间同步获取的大气辐射校正技术进行了研究。首先总结了利用卫星搭载专用大气辐射校正载荷,同步提供大气校正参数与地表反射特性的方法,从根本上解决辐射传输模型中的大气参数难以同步获取的问题。其次结合国外在轨运行的高光谱遥感卫星的调研结果,在大气校正载荷的设计一尤其是谱段选择和优化方面对载荷系统的方案特点和技术指标进行了归纳.并选取EO-1 Hyperion高光谱遥感图像进行了大气校正,从校正前后图像的视觉效果、光谱特性、典型地物的分类识别效果三方面分析了大气校正对高光谱遥感定量化应用性能的提升。最后对大气辐射校正技术的发展前景进行展望。

In order to meet the quantitative application requirements of the hyperspectral remote sensing images, to solve the problem that the synchronous atmospheric parameters can not be achieved for the existed atmospheric correction methods, the atmospheric correctional technology based on the atmospheric parameter space synchronization acquisition was investigated. Firstly, the method of using remote sensing technology to apply synchronous parameters and the sampling of surface reflectance is summarized. Secondly, based on the research results of hyperspectral remote sensing satellite in orbit, the technical indexes and characteristics in the designation of atmospheric corrector especially about the wavebands studies are summarized. The atmospheric correction of hyperspectral images is accomplished from EO-1 Hyperion sensor, and the improvements of application performance are analyzed in the following aspects： imaging results, spectral characteristics, and classification effects of typical features. In the end, the development of atmospheric radiation correction technology is prospected.