1. The Johns Hopkins University Applied Physics Laboratory; Laurel Maryland USA
2. Southwest Research Institute; San Antonio Texas USA
3. Department of Physics and Astronomy; University of Texas at San Antonio; San Antonio Texas USA
4. Laboratory for Atmospheric and Space Physics; University of Colorado Boulder; Boulder Colorado USA
5. NASA Goddard Space Flight Center; Goddard Maryland USA
6. Department of Physics and Astronomy; University of Iowa; Iowa City Iowa USA
7. Jet Propulsion Laboratory; Pasadena California USA
8. Department of Astrophysical Sciences; Princeton University; Princeton New Jersey USA