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The Advanced Earth Observing Satellite (ADEOS), Japanese name MIDORI, was the first international space platform dedicated to Earth environmental research. It was developed and managed by the National Space Development Agency of Japan (NASDA). The TOMS (Total Ozone Mapping Spectrometer) instrument, along with NSCAT (a NASA spectrometer designed to study wind speed and direction) were the major U.S. components of the platform.