1. Jet Propulsion Laboratory; California Institute of Technology; Pasadena California USA
2. Department of Geophysics; Kyoto University; Kyoto Japan
3. Instituto de Pesquisas Espaciais; São José dos Campos Brazil
4. Department of Atmospheric, Oceanic and Space Sciences; University of Michigan; Ann Arbor Michigan USA
5. Los Alamos National Laboratory; Los Alamos New Mexico USA