1. Univ. Paris Saclay, Univ. Paris VI - Pierre et Marie Curie, CNRS (France)
2. Lab. Lagrange, Univ. de Nice Sophia-Antipolis, CNRS (France)
3. Institut d'Astrophysique Spatiale, Univ. Paris XI, CNRS (France)
4. Royal Meteorological Institute of Belgium (Belgium)
5. Physikalisch-Meteorologisches Observatorium Davos (Switzerland)
6. Univ. Paris Saclay, Univ. Paris VI Pierre et Marie Curie, CNRS (France)
7. PMOD/WRC (Switzerland)
8. IRFU, CEA-Saclay (France)
9. CNES (France)
10. Royal Observatory of Belgium (Belgium)
11. National Solar Observatory (United States)
12. Unité de Recherche Appliquée en Energies Renouvelables (Algeria)