1. Cooperative Institute for Research in Environmental Sciences University of Colorado Boulder Boulder CO USA
2. National Centers for Environmental Information National Oceanic and Atmospheric Administration Boulder CO USA
3. National Environmental Satellite, Data, and Information Service National Oceanic and Atmospheric Administration Silver Spring MD USA
4. Goddard Space Flight Center National Aeronautics and Space Administration Greenbelt MD USA
5. Space Weather Prediction Center National Oceanic and Atmospheric Administration Boulder CO USA
6. Center for Astrophysics, Harvard and Smithsonian Cambridge MA USA