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Near Real-time Experiments


This website presents an operational near real-time estimation of evapotranspiration using remote sensing data. The website uses data mainly from Moderate-resolution Imaging Spectroradiometer (MODIS) and Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER). MODIS is a payload scientific instrument launched into Earth orbit by NASA in 1999 on board the Terra (EOS AM) Satellite, and in 2002 on board the Aqua (EOS PM) satellite. The instruments capture data in 36 spectral bands ranging in wavelength from 0.4 um to 14.4 um and at varying spatial resolutions (2 bands at 250 m, 5 bands at 500 m and 29 bands at 1 km). Together the instruments image the entire Earth every 1 to 2 days. They are designed to provide measurements in large-scale global dynamics including changes in Earth's cloud cover, radiation budget and processes occurring in the oceans, on land, and in the lower atmosphere. Downward short-wave radiation and cloud cover data are taken from GEWEX Continental Scale International Project (GCIP) and GEWEX Americas Prediction Project (GAPP) Surface Radiation Budget (SRB) Data . The primary focus of this research is to estimate land surface evapotranspiration from remote sensing data. Our special interest is to achieve a near real-time crop water use estimation using remote sensing.

Our focus regions are the Sacramento River Basin and the Klamath River Basin. The Near Real-time Experiments are extended to the region of (124.5W,119.5W,37.5N,44N).

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