FeO and TiO2 abundance analysis around Apollo-17 landing site using reflectance spectra from the HySI sensor on-board Chandrayaan-1

摘要

The Hyperspectral Imager (HySI) on-board Chandrayaan-1 was used for mineralogical mapping of the lunar surface in the visible and near infrared spectral range. The objective of the present study is to investigate the lunar surface composition around the Apollo-17 landing site using the HySI-derived reflectance data and generate elemental abundance maps at higher spatial resolution. In situ data from returned samples along with spectral reflectance band ratios of 950 nm/750 nm and 450 nm/750 nm, normalized by 750 nm reflectance have been used for iron oxide (FeO) and titanium oxide (TiO2) abundance mapping respectively. The HySI-generated FeO and TiO2 maps were further compared with Clementine-derived FeO and TiO2 maps and found to provide more details on the compositional variability. The regression equation derived using the HySI reflectance data can be used further to map the composition of the physically unsampled lunar surface.