基于改进Gordon算法的内陆水体大气校正研究

Atmospheric Correction of Inland Water Based on Improved Gordon Algorithm

内陆水体大气校正是水质参数定量估算的基础。本文针对浑浊Ⅱ类水体,在Gordon大气校正的基础上,引入MODIS气溶胶散射分区计算方法,实现GOCI和HJ-1 CCD影像的水体大气校正,并将该算法应用于不同时期的影像中。与地面准同步实测数据进行对比分析,结果表明:不同时期的GOCI和HJ-1 CCD影像大气校正结果均与准同步实测光谱结果相近,校正结果的平均RMSE数值也都较小,校正精度较高,能很好地应用于不同遥感影像。

Atmospheric correction of inland water is the basis of quantitative estimation of water quality parameters.In this paper,based on the auxiliary data of MODIS,improved Gordon atmospheric correction method was introduced fordivided areas of GOCI and HJ-1 CCD images.And the algorithm was applied to the images of different periods.The results showed that the atmospheric correction results of GOCI and HJ-1 CCD images were superior to the quasi synchronous measured data.The averaged RMSE of GOCI and HJ-1 CCD data were small and the correction accuracies were high.The improved Gordon algorithm was suitable for different remote sensing images.