Matti Mõttus received the M.Sc. degree in physics and the Ph.D. degree in environmental physics from the University of Tartu, Tartu, Estonia, in 2000 and 2004, respectively. He has worked with the Tartu Observatory, Tõravere, Estonia and the University of Helsinki, Helsinki, Finland. He was an Academy of Finland Research Fellow with the Department of Geosciences and Geography, the University of Helsinki, and VTT Technical Research Centre of Finland, Espoo, Finland, between 2013 and 2018. He is currently a principal scientist with VTT Technical Research Centre of Finland, interested in imaging spectroscopy, mapping of forest structure and function, and radiative transfer in vegetation canopies.