The earth observation micro-satellite "TAIKI" is a 50 kg class small satellite which is developed as the mission demonstration of the space business model. The TAIKI project was kicked off at April in 2003 by the volunteer group that consists of students, researchers and engineers. We have plans of attaining of the practical use of the TAIKI in 2011. The TAIKI is characterized by a spaceborne small hyperspectral sensor with a VNIR. The hyperspectral imager acquires more spectral information from objects with a high spectral resolution compared with conventional multispectral sensors. The hyperspectral sensor enables to distinguish a targeted object with a high accuracy, and give us lots of important information. The spaceborne small hyperspectral sensor named HSC-III is targeted at the performances of 30 m GSD, the wavelength range from 400 nm to 1000 nm, 10 nm spectral resolutions, 61 spectral bands, SNR more than 300 and mass less than 10 kg. The main objectives are utilization of agricultural remote sensing and visualization of global warming. This year we developed the breadboard model of HSC-III an optical unit funded by New Energy Development Organization (NEDO) in Japan. The breadboard model of HSC-III is specified by the wavelength range from 400 nm to 1000 nm, 81 spectral bands, and radiometric resolution of 10 bits and data transfer rate of 200 frame/seconds. The actual statuses of HSC-III are the design and development of the breadboard model phase.
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