基于辐射传输模型的环境一号卫星CCD相机的水体大气校正方法研究  

Atmospheric Correction Method for HJ-1 CCD Imagery over Waters Based on Radiative Transfer Model

作　　者：许华[1,2,3] 顾行发[1,2] 李正强[1,2] 李莉[1,2] 陈兴峰[1,2] 

机构地区：[1]国家环境保护卫星遥感重点实验室,北京100101 [2]遥感科学国家重点实验室,中国科学院遥感应用研究所,北京100101 [3]中国科学院研究生院,北京100049

出　　处：《光谱学与光谱分析》2011年第10期2798-2803,共6页Spectroscopy and Spectral Analysis

基　　金：国家科技重大专项“水专项”(2009ZX07527-006);国家重点基础研究发展计划(973计划)项目(2010CB950801);国家自然科学基金面上项目(41075018)资助

摘　　要：水体大气校正问题是开展我国环境一号卫星水色遥感定量化应用的关键。针对环境卫星CCD相机的特点,以水气耦合的辐射传输模型构建大气校正参数查找表,研究以地面气象数据辅助的逐像元水体大气校正方法,实现水体离水反射率和遥感反射比的反演。以现场测量数据和MODIS数据为参考进行水体大气校正效果验证,研究发现CCD相机的反演结果在蓝、绿波段的精度较高而红、近红的反演结果系统偏大。研究结果还表明气溶胶模型是影响水体大气校正精度的重要因素。Atmospheric correction is a bottleneck in quantitative application of Chinese satellites HJ-1 data to remote sensing of water color. According to the characteristics of CCD sensors, the present paper made use of air-water coupled radiative transfer model to work out the look-up table （LUT） of atmospheric corrected parameters, and thereafter developed pixel-by-pixel atmospheric correction method over waters accomplishing the water-leaving remote sensing reflectance with accessorial meteorological input. The paper validates the HJ-1 CCD retrievals with MODIS and irrsitu results. It was found that the accuracy in blue and green bands is good. However, the accuracy in red or NIR bands is much worse than blue or green ones. It was also demonstrated that the aerosol model is a sensitive factor to the atmospheric correction accuracy.

关 键 词：水体大气校正 环境一号卫星CCD相机 离水反射率 遥感反射比 

分 类 号：TP79[自动化与计算机技术—检测技术与自动化装置]