1. Institute of Solar Research; Researcher, M.Sc. Physics, German Aerospace Center (DLR); Plataforma de Almería, Ctra. de Senés s/n km 5 04200 Tabernas Spain
2. Institute of Solar Research; German Aerospace Center (DLR); Plataforma de Almería, Ctra. de Senés s/n km 5 04200 Tabernas Spain
3. CSP Services GmbH; Friedrich-Ebert-Ufer 30 51143 Cologne Germany
4. TSK FLAGSOL; Anna-Schneider-Steig 10 50678 Cologne Germany
5. Energy Department, Renewable Energy Division; CIEMAT; Av. Complutense, 40 28040 Madrid Spain
6. MeteoSwiss; Les Invuardes 1530 Payerne Switzerland
7. Energy Meteorology Unit, Energy and Semiconductor Research Laboratory, Institute of Physics; Oldenburg University; 26111 Oldenburg Germany
8. O. I. E.-Centre Observation, Impacts, Energy; MINES ParisTech, PSL Research University; CS 10207 F-06904 Sophia Antipolis CEDEX France
9. Institute of Solar Research; German Aerospace Center (DLR); Linder Höhe 51147 Cologne Germany