RAMI website

Discrete

RAMI3 phase

This set of experiments was suggested to simulate the radiative transfer regime under conservative scattering conditions for homogeneous environmental scenes composed of a large number of non overlapping disc-shaped objects representing the leaves, located over a horizontal plane standing for the underlying soil surface. To address the needs of different RT models, we are providing both a statistical scene description, as well as, a file with the exact coordinates of every leaf in the canopy. You may or may not make use of this information depending on the needs of your particular model.

These objects were randomly distributed finite sized 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 radiative properties of the underlying soil were also specified (in this case a simple Lambertian scattering law). The particular values selected for these input variables represented classical plant canopy conditions.

The tables below provide the details required to execute each of the experiments in this category. Every table is preceeded by the corresponding experiment identifier tag <EXP> that is needed in the naming of the various measurement results files (see file naming and formatting conventions).

Homogeneous purist corner discrete scene representation.
Homogeneous purist corner discrete scene representation.

Leaf Area IndexScatterer Normal DistributionScene descriptionStatistical properties
1.0 [m² ⁄ m²]Erectophileherehere
2.0 [m² ⁄ m²]Erectophileherehere
5.0 [m² ⁄ m²]Erectophileherehere
1.0 [m² ⁄ m²]Planophileherehere
2.0 [m² ⁄ m²]Planophileherehere
5.0 [m² ⁄ m²]Planophileherehere

brfop

Results for BRF in the cross plane (perpendicular to the principal plane)

brfop_co_sgl

Results for BRF in the cross plane for single-scattered radiation

brfop_mlt

Results for BRF in the cross plane for multiple-scattered (two or more scattering events) radiation

brfop_uc_sgl

Results for BRF in the cross plane for single-scattered radiation collided by the soil

brfpp

Results for BRF in the principal plane (total)

brfpp_co_sgl

Results for BRF in the principal plane for single-scattered radiation

brfpp_mlt

Results for BRF in the principal plane for multiple-scattered (two or more scattering events) radiation

brfpp_uc_sgl

Results for BRF in the principal plane for single-scattered radiation collided by the soil

fabs

Results for Absorption by the canopy (turbid or discrete)

ftran

Results for Total transmission through the medium at the lower boundary level