1. The Johns Hopkins University Applied Physics Laboratory Laurel MD USA
2. Department of Physics University of Helsinki Helsinki Finland
3. Department of Earth and Planetary Science Graduate School of Science the University of Tokyo Tokyo Japan
4. Swedish Institute of Space Physics (IRF) Uppsala Sweden
5. Instituto de Geofísica Universidad Nacional Autónoma de México Ciudad Universitaria Ciudad de México Mexico
6. Finnish Meteorological Institute Helsinki Finland
7. Institute of Atmospheric Physics Academy of Sciences of the Czech Republic Prague Czech Republic
8. Space Science Institute Boulder CO USA
9. Virginia Polytechnic Institute and State University Blacksburg VA USA
10. University of California Los Angeles CA USA
11. Space Weather Prediction Center National Oceanic and Atmospheric Administration (NOAA) Boulder CO USA