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Using spatial context in satellite data to infer regional scale evapotranspiration

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1 Author(s)
Price, John C. ; USDA Agric. Res. Service Beltsville, MD, USA

An estimate of evapotranspiration is developed by relating variations of satellite-derived surface temperature to a vegetation index computed from satellite visible and near-infrared data. The method requires independent estimates of evapotranspiration for a completely vegetated area and for a nonvegetated area, although such areas need not appear in the satellite data. A regional estimate of evapotranspiration is derived despite the lack of precise estimates for individual satellite measurements. The method requires spatial variability in the satellite data: it does not apply in uniform areas. In addition, a property is identified which permits discrimination of cirrus clouds from areas of varying soil moisture

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Geoscience and Remote Sensing, IEEE Transactions on  (Volume:28 ,  Issue: 5 )