RAMI website

Floating Spheres

RAMI2 phase

These experiments were suggested to simulate the radiative transfer regime in the red and near infra-red spectral bands for heterogeneous environments. The representation of the 3-D foliage structure is to be done either in a deterministic manner (discrete case), that is, the location and orientation of every individual scatterer is known, or else, using a statistical approach where volumes with particular foliage properties are defined at specified locations within the scene. Within these volumes, scatterers can then either be finite-sized or else non-dimensional (turbid case).

Heterogeneous environments are typically represented with 3-dimensional models. If applicable by the RT model at hand, cyclic boundary conditions must be applied to all test cases unless specified otherwise on the individual measurement description pages. Furthermore, the various measurements that are required to be carried for each test case, are always defined with respect to a reference plane which - unless specified otherwise - covers the entire test case area (known as the "scene"), and is located at the top-of-the-canopy, that is, just above the highest structural element in the scene.

The various testcases that are defined within this phase of the RAMI initiative can be visualized on their respective description pages:


Scene description for Discrete environments


Scene description for Turbid environments