Estimación de la radiación neta a nivel del suelo a partir de datos captados por el sensor ETM

Knowledge of Energy Balance (EB) at land surface is of main interest for environmental applications, such as climatic change, hydrology and others. The most important term in the BE equation is the net radiation (Rn). Numerous methods that allow estimating Rn have been presented in the literature in recent years. In the present paper a methodology for Rn estimation using remote sensing data is presented. The methodology is implemented using data captured by Enhanced Thematic Mapper sensor on board Landsat 7 satellite. Albedo, emissivity and land surface temperature have been retrieved from visible, infrared and thermal data. The initial results from ground measurements for two images acquired on April 27 and November 21, 2001 showed that these maps are reasonably accurate. Palabras-clave: remote sensing, net radiation, mono-channel algorithm, sensor remoto, radiacion neta, ecuacion monocanal.