water (version 0.5)

METRIC.Rn: Estimates Net Radiation as in METRIC Model

Description

Estimates Net Radiation as in METRIC Model

Usage

METRIC.Rn(image.DN, WeatherStation, MTL, sat = "auto", thermalband, alb.coeff = "Tasumi", LAI.method = "metric2010", plain = TRUE, DEM, aoi)

Arguments

image.DN

raw imagen in digital counts to evaluate

WeatherStation

Weather Station data, can be a waterWeatherStation object

MTL

Landsat metadata file

sat

Landsat satellite version. "L7" or "L8"

thermalband

Landsat low gain thermalband

alb.coeff

coefficient to transform narrow to broad band albedo. See Details.

LAI.method

Method used to estimate LAI from spectral data. See Details.

plain

Logical. If TRUE surface is assumed plain

DEM

Digital Elevation Model of the study area. Not needed if plain = TRUE

aoi

SpatialPolygon object with limits of Area of interest

References

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