PGLIERC （Preliminary GLobal Imager experiment at Environmental Research Center）: その概要について

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  • Preliminary Global Imager Experiment at Environmental Research Center, University of Tsukuba (PGLIERC): Its Overview
  • PGLIERC Preliminary GLobal Imager experiment at Environmental Research Center ソノ ガイヨウ ニ ツイテ

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<p>Preliminary GLobal Imager experiment at Environmental Research Center (PGLIERC) was carried out as a preliminary ground-based experiment of Global Image (GLI) boarded on Advanced Earth Observation Satellite-II (ADEOS-II) which will be launched in 2000. PGLIERC has four main objectives: 1) validation of the estimation of physical properties on the ground using multi-spectral satellite data, 2) reconsideration to relationship between satellite data and ground-based data (in particular in the hydrological aspect), 3) monitoring of the temporal variations in the combinations of Vegetation Indices (VIs) and surface temperature (Ts) at “real scale”, and 4) monitoring and modeling of Bidirectional Reflectance Distribution Function (BRDF). Study field is grassland, located in the Environmental Research Center, University of Tsukuba. This field has a meteorological tower of 30 m height. Some preliminary findings in PGLIERC are summerized as follows.</p><p>1) Seasonal changes in spectral reflectances in visible and near infrared were quite different from each other. 2) Vegetation indices derived from in-situ observation represented phenology of the grassland. 3) Vegetation index derived from a spectrometer by the tower observation was similar to that from the in-situ observation. 4) The inclination of VI/Ts relationship, estimated from grid measurements, steepened with the drying of the soil. 5) A hot spot effect was confirmed from the BRDF measurement.</p>

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