1. Finnish Geospatial Research Institute (FGI), Vuorimiehentie 5, FI-02150 Espoo, Finland
2. Finnish Fireball Network, Ursa Astronomical Association, Kopernikuksentie 1, FI-00130 Helsinki, Finland
3. Department of Physics, University of Helsinki, Gustaf Hällströmin katu 2a, P.O. Box 64, FI-00014 Helsinki, Finland
4. Institute of Physics and Technology, Ural Federal University, street of Peace 19, 620002 Ekaterinburg, Russia
5. Hankasalmi observatory, Jyväskylän Sirius ry, Verkkoniementie 30, FI-40950 Muurame, Finland
6. Clayhole observatory, Jokela, Tiriläntie 7, 05400 TUUSULA, Finland
7. Department of Earth Sciences, Western University, London, ON N6A 5B7, Canada
8. The Institute for Earth and Space Exploration, Western University, London, ON N6A 3K7, Canada