环境减灾卫星高光谱数据大气校正模型及验证  

Research on Modeling and Validating of Atmospheric Correction for HJ-1A Hyperspectral Imager Data

作　　者：杨贵军[1] 黄文江[1] 刘三超 邢著荣[1,3] 王纪华 

机构地区：[1]国家农业信息化工程技术研究中心,北京市农林科学院,北京100097 [2]民政部国家减灾中心遥感部,北京100053 [3]山东科技大学遥感科学与技术系,青岛266510

出　　处：《北京大学学报（自然科学版）》2010年第5期821-828,共8页Acta Scientiarum Naturalium Universitatis Pekinensis

基　　金：北京市自然科学基金(4102021);国家自然科学基金(40901173);中国科学院遥感应用研究所遥感科学国家重点实验室开放基金(2009KFJJ020);国家重点基础研究发展计划项目(2007CB714401);国家高技术研究发展计划专项经费(2007AA10Z201,2006AA10Z201)资助

摘　　要：根据四流近似辐射传输理论,建立了适合环境与减灾卫星高光谱传感器(HSI)的大气校正解析模型,给出了模型中6个大气参数的数值计算方法。经与MODTRAN模型比较,解析模型误差小于0.5%,表明具有较高的数值模拟精度。利用与HSI数据同步过境MODIS数据生成的大气温湿度廓线产品和气溶胶产品,求解出了6个大气校正参数,并将其用于定标后HSI数据的大气校正,获得了地物真实高光谱反射率。经与地面同步观测光谱数据比较,波长大于700nm波段范围内校正结果与地面观测值一致性较好;其他波段受仪器自身存在较大噪声影响,校正后反射率高于地表观测值。According to four-streams approximation of radiation transfer theory,the analytical model of atmospheric correction for hyper spectral imager（HSI） sensor of environment and disaster reduction small satellites（named as HJ-1A /1B） was given with six atmosphere parameters.The testing for constructed analytical model was carried out,through comparing outputs radiance at sensor between MODTRAN and the proposed model.It shows that the relatively errors of them are less than 0.5%.Using the atmospheric products of MODIS at same over-pass from HSI sensor,the six parameters of the proposed model were resolved and were applied in correcting HSI data to acquire land surface reflectance.The results from validation between corrected reflectance and measurements are good consistency for wavelength less than 700 nm,for other bands it is greater than field measurements causing by sensor-self noise effect.

关 键 词：环境与减灾卫星 HSI 大气校正 MODIS 

分 类 号：P407[天文地球—大气科学及气象学]