1. Space Vehicles Directorate Air Force Research Laboratory Hanscom AFB Massachusetts USA
2. Advanced Power Technologies Inc. Washington D. C. USA
3. STAR Lab, Stanford University Stanford California USA
4. Naval Research Laboratory Washington D. C. USA
5. Geophysical Institute University of Alaska Fairbanks Fairbanks Alaska USA
6. Air Force Office of Scientific Research Arlington Virginia USA
7. Lebedev Institute of Physics Moscow Russia