提出了一个利用SeaWiFS数据反演气溶胶光学厚度与沿岸地物光谱反射率的迭代算法.该算法借助于6S辐射传输模型,利用水色卫星的近红外通道由水体像元首先反演出0.55μm波段的气溶胶光学厚度,在所选影像晴空无云的条件下假定沿岸陆地上空的大气条件与水体上空的大气条件相同,然后再迭代计算出沿岸地物光谱反射率.给出了实际卫星数据计算的结果,并对可能出现的非清洁水体与气溶胶对时空变化引起的误差进行了数值模拟.

In this study,we present an iterative algorithm for the determination of aerosol optical thickness and the surface reflectance along coastal zone from SeaWiFS measurement.The outgoing radiances and the path radiance were inferred from 6s atmospheric radiative transfer code.Numerical experiments with SeaWiFS measurement were carried out to investigate the sensitivity of the algorithm.The iterative algorithm is applied to determine the surface reflectance in the East Ocean zone of China from SeaWiFS data.