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首页> 外文期刊>Icarus: International Journal of Solar System Studies >Application of multiple photometric models to disk-resolved measurements of Mercury's surface: Insights into Mercury's regolith characteristics
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Application of multiple photometric models to disk-resolved measurements of Mercury's surface: Insights into Mercury's regolith characteristics

机译：多种光度学模型在通过磁盘分辨的水星表面测量中的应用：深入了解水星的胶结特性

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摘要

Photometric analyses are used to standardize images obtained at a variety of illumination and viewing conditions to a common geometry for the construction of maps or mosaics and for comparison with spectral measurements acquired in the laboratory. Many models exist that can be used to model photometric behavior. Two of the most commonly use models, those of Hapke and Kaasalainen Shkuratov, are compared for their ability to standardize MESSENGER images of Mercury. Analysis of the modeling results shows that photometric corrections using the Kaasalainen Shkuratov model provides significantly less contrast between images acquired at large differences in emission angle. The contrast seen between images acquired at large differences in either incidence and phase angle is smaller with the Hapke model based corrections, but not significantly better than that provided by the Kaasalainen Shkuratov model. Photometric studies are also used to infer scattering properties of the surface regolith. The quantitative correlation between photometric model parameters and surface properties is questionable, but laboratory studies do indicate general correlations and trends between parameters and sample properties that allow for comparisons between surfaces based on photometric modeling. Based on comparisons with the Moon and several asteroids that have been observed by spacecraft, the photometric analyses presented here are interpreted to indicate that Mercury's regolith is smoother on micrometer scales and has a narrower particle size distribution with a lower mean particle size than lunar regolith. Grain structures of regolith particles from Mercury are inferred to be different than those of the Moon or those asteroids observed to date. Mercury's regolith may contain a component compositionally distinct from lunar regolith. (C) 2016 The Authors. Published by Elsevier Inc.
机译：光度分析用于将在各种照明和观察条件下获得的图像标准化为通用的几何图形，以构建地图或镶嵌图，并与实验室中获得的光谱测量结果进行比较。存在许多可用于对光度行为进行建模的模型。比较了两种最常用的模型，即Hapke和Kaasalainen Shkuratov的模型，这些模型可以标准化水星的MESSENGER图像。对建模结果的分析表明，使用Kaasalainen Shkuratov模型进行的光度校正在以较大的发射角差异获取的图像之间提供的对比度明显较低。使用基于Hapke模型的校正，在入射角和相位角均存在较大差异的情况下获取的图像之间的对比度较小，但并不比Kaasalainen Shkuratov模型提供的对比度明显好。光度研究也被用来推断表面块石的散射特性。光度学模型参数与表面特性之间的定量相关性值得怀疑，但是实验室研究确实表明了参数与样品特性之间的一般相关性和趋势，从而允许基于光度学建模进行表面之间的比较。根据与航天器观测到的月球和几种小行星的比较，这里介绍的光度分析被解释为表明，水银的重石在微米尺度上更光滑，并且粒度分布较月球重石更窄，平均粒径更低。据推测，来自水星的重排石颗粒的颗粒结构不同于月球或迄今为止观测到的小行星的颗粒结构。水星的重石可能包含成分与月球重石不同的成分。 （C）2016作者。由Elsevier Inc.发布

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