Abstract
The Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) is an imaging radiometer with 14 spectral bands and 15 to 90 m spatial resolution that is to be launched in 1998 on NASA`s EOS AM-1 spacecraft. The ASTER spectrally spans the visible and near-infrared (VNIR), short-wave-infrared (SWIR), and thermal infrared (TIR) regions with a 60 km-wide image swath. The SWIR bands target characteristic absorption features of phyllosilicate and carbonate minerals for the purpose of lithologic mapping. Emissivity patterns derived from the TIR bands will be useful to characterize silicate rocks. Data from the VNIR bands with high spatial resolution will be helpful not only to assess iron oxide minerals and vegetation, but also to perform photogeologic interpretation of geologic structures and lithologic mapping based upon topographic textures.
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