Abstract
In the case of airless bodies, space weathering effects are so strong that their surface reflectance spectra show reddened continua, lowered albedos, and attenuated absorption features. Thus, important features for detecting component minerals and their chemical compositions are suppressed. A simple model was proposed which accounts for the optical effects of nanophase reduced iron particles in a semi-transparent matrix (Hapke 2001). An improved version of this Hapke's model is introduced. And in the surface reflectance spectra of planets, we often find a composite absorption band in wavelength due to the component silicates. As a method of deconvolving this complex absorption band into those of its component minerals, MGM is used as a standard way. Each mineral species usually has multiple bands which overlap with one another and those of other minerals, making it difficult to assign the deconvolved bands into individual mineral components. Because the relationship between the chemical composition and absorption band characteristics of some minerals are known to some extent, it is expected that the above problem can be solved by utilizing such knowledge.
