Environmental monitoring in East Asia using high spatial resolution satellite.

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Even though vegetation varies largely in spatial and temporal scales, there are signs of rapid degradation in East Asia due to human activities and environmental effects. To monitor environmental characteristics, research was conducted by using several kinds of measuring systems and satellite imagery. Although remote sensing is a useful tool for obtaining data over large areas, there are problems in methodology and accuracy to overcome for the technique to be utilized successfully. Therefore, it is emphasized that in situ observation remains essential when applying remote sensing techniques. Spectral reflectance in the solar spectrum was measured synchronously and compared near ground and a high spatial resolution satellite. Test sites were located in Japan, Korea, Taiwan, Russia and Thailand.