Institution: | 1. Department of Astronomy and Space Physics, Uppsala University, Box 537, SE-751 21 Uppsala, Sweden;2. Institute of Radio Astronomy of the National Academy of Sciences of Ukraine, Chervonopraporna st. 4, 61002 Kharkiv, Ukraine;3. Swedish Institute of Space Physics, Box 537, SE-751 21 Uppsala, Sweden;4. LOIS Space Centre, MSI, Växjö University, SE-351 95 Växjö, Sweden |