1. European Space Agency, ESTEC, Noordwijk, The Netherlands
2. European Southern Observatory, Garching bei München, Germany
3. The Open University, Milton Keynes, United Kingdom
4. Université Paris-Saclay, CEA, CNRS, AIM, Gif-sur-Yvette, France
5. Leiden University, Leiden, The Netherlands
6. The Australian National University, Canberra, Australian Capital Territory, Australia