The Biospec project is organized around three multi-scale activities: data generation, model calibration and validation. Data generation activities which will include field measurements of biophysical variables, laboratory and field spectroscopy, eddy covariance flux measurements and airborne/satellite image acquisition. Multi-scale spatial estimations of biophysical variables and fluxes will be generated using empirical models and Radiative Transfer Models (RTMs). Models will be validated to provide an assessment on the potential uncertainty in the estimation of the different parameters at different scales.