1. Departamento de Ciencias Espaciales Instituto de Geofísica Universidad Nacional Autónoma de México Ciudad Universitaria Ciudad de México Mexico
2. Department of Physics University of Helsinki Helsinki Finland
3. Swedish Institute of Space Physics (IRF) Uppsala Sweden
4. The Johns Hopkins University Applied Physics Laboratory Laurel MD USA
5. Institute of Atmospheric Physics Academy of Sciences of the Czech Republic Prague Czech Republic
6. Department of Earth and Planetary Science Graduate School of Science The University of Tokyo Tokyo Japan
7. Space Research Institute Austrian Academy of Sciences Graz Austria
8. Dipartimento di Fisica Universita della Calabria Cosenza Italy
9. School of Physics and Astronomy Queen Mary University of London London UK