Institution: | 1. Tartu Observatory, University of Tartu, Observatooriumi 1, 61602 Tõravere, Estonia;2. Antanas Gustaitis Aviation Institute, Vilnius Gediminas Technical University, Linkmenu str. 28, 08217 Vilnius, Lithuania;3. Finnish Meteorological Institute, Erik Palménin aukio 1, P.O. Box 503, FI-00101 Helsinki, Finland;4. Department of Electronics and Nanoengineering, Aalto University School of Electrical Engineering, Maarintie 8, Espoo 02150, Finland |