Gordon H R
Appl Opt. 1981 Jan 15;20(2):207-10. doi: 10.1364/AO.20.000207.
A combination of sensor calibration error and uncertainty in the solar irradiance can cause very large errors in the computations of the water radiance contribution to the Coastal Zone Color Scanner (CZCS) -measured radiances. This is especially true when the atmospheric correction algorithm is applied in a horizontally inhomogeneous atmosphere. These possible errors can be considerably reduced through spectral measurements of the aerosol optical thickness and upwelled subsurface radiances coincident with a CZCS overpass on a very clear day. For future instruments it is suggested that provision be made for the sensor to view solar irradiance in diffuse reflection. The analysis presented shows that with such a system the error is reduced to a level even below that which would be applicable if the solar irradiance were known precisely.
传感器校准误差和太阳辐照度的不确定性相结合，可能会在计算水辐射对海岸带彩色扫描仪（CZCS）测量辐射的贡献时导致非常大的误差。当大气校正算法应用于水平不均匀的大气中时，情况尤其如此。在非常晴朗的日子里，通过与CZCS飞越同时进行的气溶胶光学厚度和向上的次表面辐射的光谱测量，可以大大减少这些可能的误差。对于未来的仪器，建议设置让传感器以漫反射方式观测太阳辐照度。所呈现的分析表明，使用这样的系统，误差会降低到甚至低于太阳辐照度精确已知时适用的水平。
