Editor(s): Thomas Kleine-Ostmann (Physikalisch-Technische Bundesanstalt, Germany), Herbert De Gersem (Technical University of Darmstadt, Germany), André Buchau (University of Stuttgart, Germany), Dirk Killat (Brandenburg University of Technology Cottbus-Senftenberg, Germany), Frank Gronwald (University of Siegen, Germany), Madhu Chandra (Chemnitz University of Technology, Germany), Ralph Latteck (Leibniz Institute of Atmospheric Physics at the Rostock University, Germany), Christian Vocks (Leibniz Institute for Astrophysics Potsdam, Germany), Alexander Kraus (Max Planck Institute for Radio Astronomy, Germany), Andreas Danklmayer (Fraunhofer Institute for High Frequency Physics and Radar Techniques, Germany), and Lars Ole Fichte (Helmut Schmidt University, Germany)