卫星遥感气溶胶光学厚度的双通道方法

本文提出了一种利用ＮＯＡＡ－１４极轨卫星甚高分辨率辐射计可见光和近红外两个通道的反射率资料遥感晴空条件下，均匀下垫面上整层大气气溶胶光学厚度的双通道方法。该方法利用气溶胶散射的波长关系，把基于大气辐射传输方程近红外通道的光学厚度均值引入可见通道，使单个通道中地表反射率和大气因子参数化的误差得以抵消，极大地提高遥感精度。

A TWO-CHANNEL ALGORITHM FOR AEROSOL OPTICAL THICKNESS WITH SATELLITE DATA

A two-channel algorithm is developed to retrieve aerosol optical thickness using data of AVHRR on board NOAA-14 for cloudless atmosphere over uniform underlying surface. With the relation of aerosol's scattering on wave length, the offsetting of the error of the visible and the near-infrared bands from the parameterization of atmospheric factors and underlying surface reflectance in the mean-value method based on radiative transfer equation make this algorithm get the value of aerosol optical thickness with high precision (>90%)