1. Institute for Geophysics and Meteorology, University of Cologne, Cologne, Germany
2. University of Helsinki and Finnish Meteorological Institute, Helsinki, Finland
3. Finnish Meteorological Institute, Helsinki, Finland
4. NASA Goddard Space Flight Center, Greenbelt, Maryland
5. Earth and Environmental Sciences, Vanderbilt University, Nashville, Tennessee, and Space Science and Engineering Center, University of Wisconsin–Madison, Madison, Wisconsin
6. Environmental Remote Sensing Laboratory, École Polytechnique Fédérale de Lausanne, Lausanne, Switzerland
7. Department of Meteorology and Atmospheric Science, The Pennsylvania State University, University Park, Pennsylvania
8. Department of Space, Earth and Environment, Chalmers University of Technology, Gothenburg, Sweden
9. European Centre for Medium-Range Weather Forecasts, Reading, United Kingdom
10. Department of Earth, Ocean and Atmospheric Science, The Florida State University, Tallahassee, Florida
11. Joint Institute for Earth System Science and Engineering, University of California, Los Angeles, Los Angeles, California, and Jet Propulsion Laboratory, California Institute of Technology, Pasadena, California
12. Department of Meteorology, University of Reading, Reading, United Kingdom