flim: Forest Light Interaction Model (FLIM)
In ccrtm: Coupled Chain Radiative Transfer Models

Description Usage Arguments Details Value References

The FLIM model was first described by Rosema et al (1992). In FLIM forests are assumed a discontinous mix of tree crowns and gaps. Reflectance is modelled in terms of the probabilty to observe either a gap (background) or a tree crown. Both gaps and crowns may be shaded.

1	flim(Rc, Rg, To = NULL, Ts = NULL, params, area = 10000)

`Rc`	Canopy reflectance at infinite depth
`Rg`	soil/background reflectance
`To`	transmission in viewing direction
`Ts`	transmission in sun direction
`params`	a named vector of parameters: [1] = D, stand density (confounded with cd) [2] = cd, crown diameter (confounded with D) [3] = h, mean crown height [6] = Solar zenith angle (tts) [7] = Observer zenith angle (tto) [8] = Sun-sensor azimuth angle (psi)
`area`	area of stand

Confounded parameters pairs cannot be inversely estimated, one of the pairs should be set to 1.

a list with reflectance, and the fractions of shaded and sunexplosed crowns, shaded and sun exposed open space.

Rosema, A., Verhoef, W., Noorbergen, H., Borgesius, J.J. (1992). A new forest light interaction model in support of forest monitoring. Remote Sens. Environ. 42, 23-41.

ccrtm documentation built on Feb. 26, 2021, 9:06 a.m.