measure the polarization of the radio signal emitted by air showers. This efforts have been intensified in the third and last phase of LOPES starting 2010, when 10 new antenna stations were installed which allow to measure the complete polarization at each station. After leading to many scientific results published in various journals, LOPES has finally been switched off in 2013. LOPES is a collaboration of ASTRON (Netherlands Foundation for Research in Astronomy, Dwingeloo, The Netherlands), the Max-Planck-Institut für Radioastronomie (Bonn, Germany), Radboud University (Nijmegen, The Netherlands), the Institute of Data Processing and Electronics (IPE) and the Institut für Kernphysik (IKP), both at the Karlsruhe Institute of Technology (Karlsruhe, Germany), and the KASCADE-Grande collaboration. The KASCADE-Grande collaboration consists of groups from Germany, Poland, Romania, and Italy. References Falcke et al. 2005, Nature, May 19 issue, "Detection and localization of atmospheric radio flashes from cosmic ray air showers"; preprint astro-ph/0505383 H. Falcke, P. Gorham, R.J. Protheroe, New Astron.Rev. 48 (2004) 1487–1510, "Prospects for radio detection of ultra-high energy cosmic rays and neutrinos"; preprint: astro-ph/0409229 External links Official LOPES project homepage (RU Nijmegen, NL) Official LOFAR project homepage The KASCADE-Grande Experiment at Forschungszentrum Karlsruhe Radio telescopes Interferometric telescopes Cosmic-ray experiments