1. German Aerospace Center (DLR), Institute of Technical Thermodynamics, 51170 Cologne, Germany
2. German Aerospace Center (DLR), Plataforma Solar de Almería, 04200 Tabernas, Spain
3. Flagsol GmbH, Mühlengasse 7, 50667 Cologne, Germany
4. Solar Systems Pty. Ltd., 322 Burwood Road, Hawthorn, Victoria 3122, Australia