W von Hoyningen-Huene (Institute of Environmental Physics/Remote Sensing, University of Bremen, Germany), AA Kokhanovsky (Institute of Environmental Physics/Remote Sensing, University of Bremen, Germany), MW Wuttke (Institute of Environmental Physics/Remote Sensing, University of Bremen, Germany), M Buchwitz (Institute of Environmental Physics/Remote Sensing, University of Bremen, Germany), S Noël (Institute of Environmental Physics/Remote Sensing, University of Bremen, Germany), K Gerilowski (Institute of Environmental Physics/Remote Sensing, University of Bremen, Germany), JP Burrows (Institute of Environmental Physics/Remote Sensing, University of Bremen, Germany), B Latter (Space Science and Technology Department, Rutherford Appleton Laboratory, Chilton, UK), R Siddans (Space Science and Technology Department, Rutherford Appleton Laboratory, Chilton, UK), BJ Kerridge (Space Science and Technology Department, Rutherford Appleton Laboratory, Chilton, UK)