1. Space and Atmospheric Electricity Group, Department of Meteorology; University of Reading; Reading UK
2. National Solar Observatory; Boulder Colorado USA
3. Space Vehicles Directorate; Air Force Research Laboratory; Kirtland AFB New Mexico USA
4. Woodlands New South Wales Australia
5. Swiss Federal Institute of Aquatic Science and Technology; Dübendorf Switzerland
6. IRAP/CNRS/UPS, PEPS; Toulouse France
7. CENTRA, Instituto Superior Tecnico; Universidade de Lisboa; Lisboa Portugal
8. GRPS, Department de Physique; Universite de Montreal; Montreal Quebec Canada
9. Departamento de Fisica; Universidade do Algarve; Faro Portugal
10. Predictive Science; San Diego California USA
11. ReSoLVE Centre of Excellence and Sodankylä Geophysical Observatory; University of Oulu; Oulu Finland
12. Space Science Division; Naval Research Laboratory; Washington District of Columbia USA