• Karel Schrijver (team co-lead), Lockheed Martin Advanced Technology Center, Palo Alto, California, USA.
• Juerg Beer (team co-lead), Swiss Federal Institute of Aquatic Science and Technology, Duebendorf, Switzerland.
• Urs Baltensperger, Paul Scherrer Institute, Villigen, Switzerland.
• Ed Cliver, Space Vehicles Directorate, AFRL, Sunspot, New Mexico, USA.
• Manuel Guedel, Department of Astronomy, University of Vienna, Vienna, Austria.
• Hugh Hudson, Space Science Laboratory, University of California, Berkeley, California, USA.
• Ken McCracken, IPST, University of Maryland, College Park, Maryland, USA.
• Rachel Osten, Space Telescope Science Institute, Baltimore, Maryland, USA.
• Thomas Peter, ETH Zürich, Zürich, Switzerland.
• Dave Soderblom, Space Telescope Science Institute, Baltimore, Maryland, USA.
• Ilya Usoskin, Sodankyla Geophysical Observatory and Department of Physics, University of Oulu, Oulu, Finland.
• Eric Wolff, British Antarctic Survey, Cambridge, UK.

Joined later by:

• Jozef Mazarik, Dept. of nuclear physics and biophysics, Commenius University, Bratislava, Slovakia.
• Konstantin Herbst, Extraterrestrial physics, University of Kiel, Germany.