[1] Swedish Inst Space Phys, SE-98128 Kiruna, Sweden
[2] RAS, Space Res Inst, Moscow 117997, Russia
[3] RAS, AM Obukhov Inst Atmospher Phys, Moscow 119017, Russia
[4] Novosibirsk State Univ, Novosibirsk 630090, Russia
[5] Athabasca Univ Geophys Observ, Athabasca T9S 3A3, AB, Canada
[6] NLC CAN AM Network, Edmonton, AB T5C 1L6, Canada
[7] NLC NET, Glengarnock KA14 3BA, Ayrshire, Scotland
[8] Univ Aarhus, DK-8000 Aarhus C, Denmark
[9] Danish Assoc NLC Res, DK-7470 Kolvra, Karup J, Denmark
[10] Moscow Assoc NLC Res, Moscow 119334, Russia