利用MODIS数据进行海岸带卫星图像大气校正

提出一种利用同步MODIS图像的水体像元反演出混浊水域上空气溶胶光学特性的算法.在晴空无云的条件下,假设一定范围内的海岸带上空的大气和水体上空的大气一致,借助6S辐射传输模型,并考虑临近像元效应,利用反演出的气溶胶光学特性对卫星海岸带图像进行大气校正的方法,给出了应用该方法对我国沿海地区QuickBird-2卫星图像和CBERS-02卫星图像进行大气订正的结果,并对反演结果进行了比较分析.实验证明,利用MODIS图像进行海岸带卫星图像大气校正取得了很好的效果,该方法无需地面实测数据,具有很高的适用性.

Atmospheric Correction of Satellite Imagery for Coastal Areas Using MODIS Data

An atmospheric correction algorithm of satellite image for turbid water of coastal areas is put forward using synchronous measuring MODIS data.Supposed that the atmospheric condition above the turbid water and the coastal areas is identical in a certain space range,this algorithm is to use the atmospheric properties retrieved by the turbid water coastal areas based on MODIS water pixel to make atmospheric correction by using the 6S radiation transfer model and taking account of the adjacency effect.Atmospheric correction was applied to QuickBird-2 imagery and CBERS-02 imagery for turbid water of coastal areas.The atmospheric correction results and the analysis of retrieval errors were given.The experiment proves that atmospheric correction of satellite imagery for turbid water coastal areas using MODIS data is efficient and adaptive without need of ground data.