Gimmestad Gary G
Georgia Tech Research Institute, Electro-Optical Systems Laboratory, Atlanta, Georgia 30332, USA.
Appl Opt. 2008 Jul 20;47(21):3795-802. doi: 10.1364/ao.47.003795.
Almost all of the depolarization papers in the lidar literature employ a physically inappropriate notation and they use a definition of the depolarization ratio that is not linear in the quantity of interest. This depolarization lidar legacy is misleading and confusing. In particular, subscripts meaning parallel and perpendicular do not apply to atmospheric parameters, such as the volume backscatter coefficient, because (for linear polarization) the two components of the backscattered light are polarized in the transmitted sense and completely unpolarized; the unpolarized component is not "perpendicular." An analysis of lidar depolarization measurements with a particle scattering matrix recently provided in the literature yields algorithms for retrieving the depolarization parameter from either linear or circular depolarization lidar measurements. The analysis, notation, and definitions recommended here harmonize lidar depolarization analysis with radiative transfer theory, particle scattering theory, and standard polarization measurement techniques.
激光雷达文献中几乎所有关于去极化的论文都采用了物理上不合适的符号表示法，并且他们使用的去极化率定义在感兴趣的量上不是线性的。这种去极化激光雷达的传统具有误导性且令人困惑。特别是，表示平行和垂直的下标并不适用于大气参数，比如体积后向散射系数，因为（对于线偏振）后向散射光的两个分量在传输方向上是偏振的且完全非偏振；非偏振分量并非“垂直”的。最近文献中给出的利用粒子散射矩阵对激光雷达去极化测量进行的分析，得出了从线性或圆偏振激光雷达测量中检索去极化参数的算法。这里推荐的分析、符号表示法和定义使激光雷达去极化分析与辐射传输理论、粒子散射理论以及标准偏振测量技术相协调。
