1. Max-Planck-Institut für Sonnensystemforschung Göttingen Germany
2. Center for Atmospheric SciencesHampton University Hampton Virginia USA
3. NASA Goddard Space Flight Center Greenbelt Maryland USA
4. Physics DepartmentThe Catholic University of America Washington District of Columbia USA
5. Atmospheric Chemistry DivisionNational Center for Atmospheric Research Boulder Colorado USA
6. Department of PhysicsUniversity of Toronto Toronto Ontario Canada
7. Department of Chemistry and BiochemistryOld Dominion University Norfolk Virginia USA