1. Department of Physics and Materials Science, Faculty of Science; Chiang Mai University; Chiang Mai Thailand
2. ThEP Center; CHE; Bangkok Thailand
3. Center for Space Physics; Boston University; Boston Massachusetts USA
4. Department of Astrophysical and Planetary Sciences and Laboratory for Atmospheric and Space Physics; University of Colorado; Boulder Colorado USA
5. Atmospheric and Environmental Research, Inc.; Lexington Massachusetts USA
6. Deceased 30 September 2011
7. Department of Physics and Astronomy; University of Leicester; Leicester UK