1. Danish Meteorological Institute, Copenhagen, Denmark;
2. IMAU, Utrecht University, Utrecht, Netherlands;
3. British Antarctic Survey, Cambridge, United Kingdom;
4. Alfred-Wegener-Institute, Helmholtz-Zentrum für Polar- und Meeresforschung, Bremerhaven, Germany;
5. Scott Polar Research Institute, University of Cambridge, Cambridge, United Kingdom;
6. University of Leeds, Leeds, United Kingdom;
7. KU-Leuven, Leuven, Belgium;
8. Delft University of Technology, Delft, Netherlands;
9. National Space Institute, Danish Technical University, Kongens Lyngby, Denmark