solarAngles: Calculates solar angles
In midraed/water: Actual Evapotranspiration with Energy Balance Models

Description Usage Arguments Details Author(s) References See Also

Metadata, aspect and slope maps are combined to estimate solar angles for the entire image.

1	solarAngles(surface.model, MTL, WeatherStation)

`surface.model`	rasterStack with DEM, Slope and Aspect. See surface.model()
`MTL`	Landsat Metadata File
`WeatherStation`	Weather Station data

Narrowband transmittances,are calculated considering some radiation transfer models operated over a wide range of climates and locations across the world, this parameter vary with the cosine of the solar angle, atmospheric pressure and precipitable water vapor in the atmosphere, so the author must obtain accurate values of these three parameters.

Guillermo Federico Olmedo

Fonseca-Luengo, David

Fernando Fuentes Peñailillo

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

Other net radiation related functions: LAI(), METRICtopo(), SWtrasmisivity(), albedo(), incLWradiation(), incSWradiation(), netRadiation(), outLWradiation(), soilHeatFlux(), surfaceTemperature()