Institution: | 1. Space Science Division, Korea Astronomy and Space Science Institute, 776, Daedeok-Daero, Yuseong-Gu, Daejeon 305-348, South Korea;2. Hitotsubashi University, 2-1 Naka, Kunitachi 186-8601, Japan;3. Space Research Institute of the Austrian Academy of Sciences, Lustbuehelstrasse 46, A-8042 Graz, Austria |