The foliage objects are randomly distributed finite size disc-shaped scatterers characterized by the specified radiative properties (reflectance, transmittance), and the orientation of the normals to the scatterers followed either an erectophile or a planophile distribution function. The particular values selected for the various input variables represent typical plant canopy conditions with bare soil, snow or green understorey as lower boundary condition (background).

The first set of homogeneous discrete experiments refers to a vegetation canopy with a planophile leaf normal distribution and a scatterer radius of 0.05 m. An ASCII file with the radius (R), centre coordinates (Xc,Yc,Zc), and direction cosines (Dx,Dy,Dz) of every single leaf in a 25×25 m² canopy section can be found here. The file (is ~ 3.5 Mbytes and) contains 79577 lines of format R Xc Yc Zc Dx Dy Dz that may serve as input to your scene creation process (to save it you have to select the central frame of the web browser before saving its content). A resume of some statistical properties of the content of this ASCII file can be seen here:

In addition, the tables below provide an overview of the structural and spectral properties of these leaf canopies. Two spectral bands (red and NIR) and two illumination conditions (direct only with SZA=20° and 50°) are proposed for three different background anisotropy scenarios, referred to as HOM23, HOM24 and HOM25 in the tables below. The difference between experiments HOM23, HOM24 and HOM25 thus lies only in the BRF of the anisotropically scattering background (assumed to be reminiscent of snow, bare soil, and understorey vegetation). The background BRF is described by the three parameter of the RPV model.

The next set of homogeneous discrete experiments refers to a vegetation canopy with a erectophile leaf normal distribution and a scatterer radius of 0.05 m. An ASCII file with the radius (R), centre coordinates (Xc,Yc,Zc), and direction cosines (Dx,Dy,Dz) of every single leaf in a 25×25 m² canopy section can be found here. The file is ~ 3.5 Mbytes and) contains 79577 lines of format R Xc Yc Zc Dx Dy Dz that may serve as input to your scene creation process (to save it you have to select the central frame of the web browser before saving its content). A resume of some statistical properties of the content of this ASCII file can be seen here:

In addition, the tables below provide an overview of the structural and spectral properties of these leaf canopies. Two spectral bands (red and NIR) and two illumination conditions (direct only with SZA=20° and 50°) are proposed for three different background anisotropy scenarios, referred to as HOM33, HOM34 and HOM35 in the tables below. The difference between experiments HOM33, HOM34 and HOM35 thus lies only in the BRF of the anisotropically scattering background (assumed to be reminiscent of snow, bare soil, and understorey vegetation). The background BRF is described by the three parameter of the RPV model.