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LESS

3-D radiative transfer model

Version 3.1.0

LESS is a 3-D radiative transfer model for remote sensing research. It runs on CPUs, NVIDIA GPUs (OptiX) and GPUs with Vulkan ray queries. The three backends share one Python interface and give consistent results. This tutorial starts with installation and a first simulation, then covers scenes, sensors and physical processes in turn.

For questions, suggestions or feature requests, please contact jianboqi@126.com.

Accuracy validation

LESS has been validated against independent analytic solutions for standard scenes. See the validation cases for the results.

Getting started

Scenes and properties

Sensors

Processes

API reference

Bundled models

Model File Description
European ash FREX.obj Deciduous tree with components leaves and stem_branch
Maize maize.obj Maize plant, single component
Simple tree tutorial_tree.obj Closed crown crown, trunk trunk and leaves leaves
Terrain tutorial_terrain.obj Undulating triangle-mesh terrain 
import less

tree_mesh = less.asset_path("FREX.obj")
maize_mesh = less.asset_path("maize.obj")