1. Department of Meteorology University of Reading Reading UK
2. Cooperative Institute for Research in Environmental Sciences University of Colorado Boulder Boulder Colorado USA
3. Space Weather Prediction Center NOAA Boulder Colorado USA
4. Space Research Institute Austrian Academy of Sciences Graz Austria
5. Institute of Geodesy Graz University of Technology Graz Austria
6. RAL Space Rutherford Appleton Laboratory Harwell Campus Didcot UK
7. Predictive Science Inc. San Diego CA USA