摘要
提出了一种在晴空条件下、均匀下垫面上利用ＮＯＡＡ－１４极轨卫星甚高分辨率辐射计（ＡＶＨＲＲ）可见光和近红外两个通道观测的反射率资料，遥感整层大气气溶胶光学厚度的双通道方法。该方法把气溶胶散射的波长关系加以推广，把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，从而极大地提高了反演精度（＞９０％）。
A dual channel algorithm is developed to retrieve aerosol optical thickness of cloudless atmosphere over homogeneous underlying surface from the reflectivity data in VIS and NIR bands observed by AVHRR on board NOAA-14. The adoption of the relationship between the aerosol's scattering and wavelength in this algorithm offsets the error in the parameterization of atmospheric factors and underlying surface reflectance when a single channel is used. The significant advantage of the dual channel algorithm is that a retrieving accuracy greater than 90% has been achieved under the condition of homogeneous surface.
出处
《南京气象学院学报》
CSCD
1998年第3期321-327,共7页
Journal of Nanjing Institute of Meteorology
关键词
大气
气溶胶
光学厚度
卫星双通道
遥感
aerosol optical thichness, satellite remote sensing, retrieving
