skyl {ccrtm}

Sky light model

Description

Simple atmospherical model that builds on recommendations from Francois et al. (2002).

Usage

skyl(rddt, rsdt, rdot, rsot, Es, Ed, tts, skyl = NULL)

Arguments

rddt

Bi-hemispherical reflectance

rsdt

Directional-hemispherical reflectance for solar incident flux

rdot

Hemispherical-directional reflectance in viewing direction

rsot

Bi-directional reflectance factor

Es

Solar flux

Ed

Diffuse flux

tts

solar angle

skyl

fraction diffuse

Value

a list with hemispherical and directional reflectance. rt<-fRTM(rho~prospect5+foursail) skyl(rt[,"rddt"],rt[,"rsdt"],rt[,"rdot"],rt[,"rsot"], Es=solar[,1],Ed=solar[,2],tts=45,skyl=NULL)

References

Francois, C., Ottle, C., Olioso, A., Prevot, L., Bruguier, N., Ducros, Y.(2002). Conversion of 400-1100 nm vegetation albedo measurements into total shortwave broadband albedo using a canopy radiative transfer model. Agronomie 22, 611-618.

Examples

data(solar)