Neutral point consideration for atmospheric correction in polarization remote sensing
偏振遥感的中性点大气纠正方法研究

Polarized reflectance of land surface is essential to remote sensing, despite the fact that the reflectance information received by polarimeter is always overwhelmed by atmospheric polarization effect, which is stronger than that of the land objects. Subtracting the atmospheric effect, therefore, is a bottleneck problem in the polarization remote sensing over land surface. Atmospheric neutral point, which refers to a position where the skylight is unpolarized, is introduced in this paper as a tool for separating the polarization effect between objects and atmosphere. The ground experimental results show that when observing the land surface from neutral point, the polarization effect of the atmosphere is reduced to zero and the polarization information of land surface is maximized. The results indicated the feasibility of using atmosphere neutral points for atmospheric correction over land surface.