Estimating Fractional Snow Cover in Open Terrain from Sentinel-2 Using the Normalized Difference Snow Index. - Simon Gascoin; Zacharie Barrou Dumont; César Deschamps-Berger; Florence Marti; Germain Salgues; Juan Ignacio López-Moreno; Jesús Revuelto; Timothée Michon; Paul Schattan; Olivier Hagolle (Remote. Sens., 2020)