Estimates Net Radiation as in METRIC Model
METRIC.Rn(image.DN, WeatherStation, MTL, sat = "auto", thermalband,
alb.coeff = "Tasumi", LAI.method = "metric2010", plain = TRUE, DEM, aoi)raw imagen in digital counts to evaluate
Weather Station data, can be a waterWeatherStation object
Landsat metadata file
Landsat satellite version. "L7" or "L8"
Landsat low gain thermalband
coefficient to transform narrow to broad band albedo. See Details.
Method used to estimate LAI from spectral data. See Details.
Logical. If TRUE surface is assumed plain
Digital Elevation Model of the study area. Not needed if plain = TRUE
SpatialPolygon object with limits of Area of interest
R. G. Allen, M. Tasumi, and R. Trezza, "Satellite-based energy balance for mapping evapotranspiration with internalized calibration (METRIC) - Model" Journal of Irrigation and Drainage Engineering, vol. 133, p. 380, 2007