(A) One of the measurement trajectories (in red) over the lake Lac des Taillères in La Brévine, flown in W direction. The inset indicates the filtered classification using NDVI (same color bar and scale as B). Satellite image by: Swiss Federal Authorities, CNES, Spot Image, Swisstopo, NPOC. (B) Qualitative reflectance data for the trajectory per wavelength in time (s). (C) V/I for the trajectory per wavelength in time (s). (D) Time-averaged reflectance for the whole lake and filtered NDVI. (E) Time-averaged circular polarization for the whole lake and filtered NDVI. The shaded areas denote the standard deviation between measurements.