Ari-Matti Harri¹, Kirsti Kauristie¹, Jesse Andries², Mark Gibbs³, Peter Beck⁴, Jens Berdermann⁵, Loredana Perrone⁶, Bert van den Oord⁷, David Berghmans⁸, Nicolas Bergeot², Erwin De Donder⁹, Martin Latocha¹⁰, Mark Dierckxsens¹¹, Haris Haralambous¹², Iwona M Stanislawska¹³, Volker Wilken¹⁴, Vincenzo Romano¹⁵, Martin Kriegel⁵ and Kari Österberg¹, (1)Finnish Meteorological Institute, Helsinki, Finland, (2)Royal Observatory of Belgium, Brussels, Belgium, (3)Met Office, Exeter, United Kingdom, (4)Seibersdorf Laboratories Inc, Vienna, Austria, (5)German Aerospace Center Neustrelitz, Neustrelitz, Germany, (6)Istituto Nazionale di Geofisica e Vulcanologia, Rome, Italy, (7)Royal Netherlands Meteorological Institute, De Bilt, Netherlands, (8)Solar-Terrestrial Centre of Excellence, Leuven, Belgium, (9)Belgisch Instituut voor Ruimte-Aeronomie, Brussel, Belgium, (10)Sebersforf Laboratories Inc., Vienna, Austria, (11)Belgian Institute for Space Aeronomy, Brussels, Belgium, (12)Frederick University Cyprus, Nicosia, Cyprus, (13)Space Research Center Polish Academy of Sciences, Warszawa, Poland, (14)German Aerospace Centre, Neustrelitz, Germany, (15)SpacEarth Technology, Rome, Italy