1. NASA Goddard Space Flight Center; Greenbelt Maryland USA
2. Center for Research and Exploration in Space Science and Technology; University of Maryland; College Park Maryland USA
3. Center for Research and Exploration in Space Science and Technology; Universities Space Research Association; Columbia Maryland USA
4. Department of Earth and Planetary Sciences; Tokyo Institute of Technology; Tokyo Japan
5. Southwest Research Institute; San Antonio Texas USA
6. Physics Department; Auburn University; Auburn Alabama USA