Apollo16登月区Hapke模型参数反演及模型敏感性分析

月表光度行为描述了月表物质反射的太阳光随入射、出射和太阳相角的变化,其反射率的不同取决于月壤颗粒大小、粒子形状、透明度、孔隙度、表面粗糙度等因素。为了分析月表光度行为,了解区域反射率差异原因,本文以Apollo16登月区为例,使用M~3(moon mineralogy mapper)数据反演Hapke模型物理参数,并分析了Hapke模型光度参数对二向性反射率的影响程度。反演结果显示,本文研究区域光度参数b、hS变化很小,光度参数w有一定的变化;表明本文研究区域反射率不同主要是w的差异造成的。研究区域月壤中各类矿物颗粒的前向散射占主导地位,月壤结构和粒径总体相近,但在孔隙度、风化层填充物状态及表面粗糙度等因素中至少有一种因素存在差异。

Hapke Model Parameter Inversion of Apollo 16 Landing Area and Model Sensitivity Analysis

The photometric behavior of the moon's surface describes how the reflected solar radiation varies with incidence,emission,and solar phase angles,depending on the physical and chemical properties of the lunar soils,such as the particle size,the shape,the porosity,and the mineralogical composition.In order to analyze the lunar photometric behavior and understand the reason of regional differences,we retrieved the photometric parameters of Hapke model using the moon mineralogy mapper data in the Apollo 16 landing area.The influence of the Hapke model photometric parameters on the bidirectional reflectance was analyzed.The inversion results showed that the parameter b and hs of the model varied slightly,while the parameter w of the model changed to certain extent.The difference of reflectance is mainly caused by the w in the study area.The mineral particles in the study area in lunar soil forward scattering dominates.The soil structure and particle size are overall similar,but at least one factor of the porosity,the weathering layer filling state,the surface roughness and other factors is different.