Canopy structure 4 Geology 4 Remote sensing 4 Vegetation 4 AQUARIUS 2 Aquarius 2 Argentina 2 Biology 2 Classification scheme 2 Computer simulation 2 Dense vegetation 2 Electromagnetic modeling 2 Experiments 2 Forward models 2 Functional forms 2 Instrumental noise 2 Land cover 2 Land surface 2 Land surface phenology 2 Land-cover types 2 NDVI 2 OSSE 2 Observing system simulation experiments 2 Phenols 2 Radiative transfer 2 Radiative transfer theory 2 Radiometers 2 Retrieval models 2 River basins 2 Scattering property 2