Characterizing southern portion of Mare Vaporum with improved Chandrayaan-1 M³ data

Abstract

We investigate a southern portion of Mare Vaporum using Chandrayaan-1 M³ images for which we suppress striped noise. Additional data processing allows us to analyze such spectral parameters as the depths and positions of the absorption bands near 1 and 2 μm. Mineral types were mapped using the cluster analysis of Adams diagram for pyroxenes. We inspected, in particular, the areas of pyroclastic deposits around the crater Hyginus and small areas in the crater which have the 2 μm band shifted to longer wavelengths. We examined the areas with phase-ratio analysis of LROC NAC images: the areas associated with clinopyroxenes are distinguished both in albedo and phase-ratio (56°/23°) images, perhaps, having higher roughness than surrounding surface; Whereas the areas associated with pyroclastic glasses does not seen neither in albedo nor phase-ratio images.