1. Office of Research and Development, U.S. Environmental Protection Agency, Research Triangle Park, NC, USA
2. U.S. Geological Survey, Center for Earth Resources Observation and Science, Garretson, SD, USA
3. Office of Research and Development, Oak Ridge Institute for Science and Education, U.S. Environmental Protection Agency, Research Triangle Park, NC, USA
4. Goddard Space Flight Center, National Aeronautics Space Administration, Greenbelt, MD, USA
5. Goddard Earth Sciences Technology and Research, Universities Space Research Association, Columbia, MD, USA