- 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.