1. Scobeltsyn
Institute of Nuclear Physics, Lomonosov Moscow State University (MSU), 119991 Moscow, Russia
2. Department
of Atmospheric and Climate Research (ATMOS), NILU - Norwegian Institute for Air Research, 2007 Kjeller, Norway
3. N.C.S.R. “Demokritos”, Institute of Nuclear and Radiological Sciences & Technology, Energy & Safety, 15341 Agia Paraskevi, Attiki Greece
4. Central Aerological Observatory (CAO), 141700 Moscow, Russia