Comparison of ASTER TOA Radiance with MODIS
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概要
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Synergistic fusion of multi-resolution remote sensing images is important to data users that require observation frequency, spatial resolution and observation wavelength. However, it requires compatibility of these data products. Top of Atmosphere (TOA) radiances of the Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) and the Moderate Resolution Imaging Spectroradiometer (MODIS) are compared in the shortwave infrared (SWIR) and it is found that the sensitivity of MODIS is slightly higher and that the ASTER radiance is higher at the lower reflectance regions. ASTER suffers from stray light phenomena because of the nature of a pushbroom sensor, which stands out for SWIR. In contrast, MODIS is free from ghost phenomena in reflective bands, although existence of stray light is known in thermal bands. In this work, correction of stray light in ASTER is carried out using MODIS images with a wider swath, which makes the correction of full scene of ASTER images.
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