Samuel Rémy, Organization Not Listed, Washington, DC, United States; HYGEOS, Lille, France, Vincent Huijnen, Royal Netherlands Meteorological Institute, De Bilt, Netherlands, Graham W Mann, University of Leeds, Leeds, LS2, United Kingdom, Simon Henri Chabrillat, Royal Belgian Institute for Space Aeronomy, Brussels, Belgium, Zak Kipling, European Centre for Medium-Range Weather Forecasts, Reading, United Kingdom and Richard J Engelen, ECMWF, Reading, United Kingdom