Remote Sensing of Grassland Biophysical Parameters in the Context of the Sentinel-2 Satellite Mission

Figure 5

Variable importance projection (VIP) by wavelength to predict the total canopy chlorophyll content (CCC, mg m⁻²) and the fraction of absorbed photosynthetically active radiation by photosynthetic vegetation components (GFAPAR, —). Gaps indicate bands deleted from the analysis. Solid dark lines indicate VIP values of the mean cross-validated model, while the lighter lines of the same color indicate the VIP range obtained with the cross-validation procedure. VIP values >1 (dashed horizontal black lines) indicate high importance to the PLSR models.