KLd                     Kullback-Lieber divergence function D(spec1 ||
                        spec2) = sum(spec1 * log(spec1 / spec2))
bRTM                    Generates an invertable model for backward
                        implementation of Radiative Transfer Models
cambell                 Leaf inclination distribution function
                        Ellipsoidal distribution function
ccrtm                   ccrtm: Coupled Chain Radiative Transfer Models.
cdcum                   Leaf inclination distribution function
                        cummulative lagden function from Wout Verhoef's
                        dissertation Extended here for any angle
data_prospect5          refractive index and specific absorption
                        coefficient for PROSPECT 5
data_prospectd          refractive index and specific absorption
                        coefficient for PROSPECT D
fRTM                    Forward implementation of coupled Radiative
                        Transfer Models.
flim                    Forest Light Interaction Model (FLIM)
foursail                Optimized R implementation of foursail (4SAIL)
foursail2               R implementation of the foursail2 model with 2
                        canopy layers.
foursail2b              R implementation of the foursail2 model with 2
                        canopy layers.
getDefaults             S3- methods for Generate defaults settings and
                        parameters for all supported models.
lidf                    Leaf inclination distribution models s3 method
                        for calling leaf models
plot.rtm.spectra        Plot RTM return spectra vs. wavelength
print.rtm.spectra       Plot RTM return spectra vs. wavelength
prospect5               PROSPECT model version 5 and 5B
prospectd               PROSPECT model version D
r_foursail              R implementation of foursail (pure R)
sail_BDRF               The SAIL BDRF function
skyl                    Sky light model
soil                    soil reflectance
solar                   direct and diffuse light
