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ASTER Level 1T data provides calibrated at-sensor radiance from the Terra satellite's Advanced Spaceborne Thermal Emission and Reflection Radiometer instrument. The dataset contains up to 14 spectral bands across visible, shortwave, and thermal infrared wavelengths, with spatial resolutions of 15, 30, and 90 meters. Data is geometrically corrected using GLS2000 elevation data and ground control points, produced by NASA, though sources conflict on its active status.
License is specified as 'other-license-specified' on Data.gov; users must review terms. The dataset is distributed as a multi-file product including BIN, ISO, JPEG, and PDF formats. According to one source, Version 3 is decommissioned and users are directed to a Version 4 product.