1. Science Systems and Applications, Inc.; Lanham Maryland USA
2. Laboratory for Atmospheres; NASA Goddard Space Flight Center; Greenbelt Maryland USA
3. Institute for Environment and Sustainability; Joint Research Centre; Ispra Italy
4. Goddard Earth Sciences and Technology Center, Laboratory for Atmospheres; NASA Goddard Space Flight Center; Greenbelt Maryland USA
5. Department of Atmospheric Science, School of Physics; Peking University; Beijing China
6. Laboratory for Terrestrial Physics; NASA Goddard Space Flight Center; Greenbelt Maryland USA