Alexander Kokhanovsky, PhD, is a scientist at the Department of Geography, Marburg University, Germany. He has authored over 350 scientific publications and is the author or editor of six books. Vijay Natraj, PhD, is a scientist at the Jet Propulsion Laboratory, California Institute of Technology (JPL), USA. His research focuses on polarization, aerosol and cloud modeling, fast radiative transfer computations, and information theoretical analysis. Dmitry Efremenko, PhD, is scientist at the German Aerospace Center (DLR). His research is focused on remote sensing of atmospheric processes.