地球大气光学偏振模式研究

Atmosphere Optical Polarization Pattern Research of Earth Surface

在导航领域的研究中,研究天空中的大气光学偏振模式,对于利用自然偏振特性进行卫星以及船舰的导航是很重要的。为了求得精确,提出了一种基于离散坐标法求解平面平行大气的矢量辐射传输方程(VRTE)得到Stocks矢量,进而计算天空偏振模式的方法进行仿真。结果表明,VRTE计算结果与瑞利散射经验公式计算结果的电矢量方向差别在10%之内,而VRTE计算可以得到更准确的偏振度信息。通过不同波长的矢量化辐射传输方程计算表明蓝光的大气散射作用要强于红光区域,为大气散射敏感器的波长选择提供了依据。

Research on the skylight polarization pattern plays an important role in the studies of the satellites or cruisers navigation using nature polarization pattern characteristic. A method of calculating the skylight polarization was proposed,which solved the vector radiative transfer equation （VRTE） of plane parallel atmosphere based on discrete ordinate method to get the Stocks parameter. Simulation results manifest that the difference of electric vector directions calculated by VRTE and Rayleigh Scatter experience formula are within 10%,and the VRTE method can obtain more accurate polarization degree. By comparing the solution of different wave-length,the polarization effect of blue light are stronger than red light,which provides an evidence for choosing the wave length of atmosphere scatter sensors.