1. Space Science Division, Korea Astronomy and Space Science Institute, Daejeon 34055, South Korea
2. Department of Astronomy and Space Science, Korea University of Science and Technology, Daejeon, South Korea
3. Department of Astronomy and Space Science, Chungbuk National University, Cheongju, South Korea
4. Institute for Physical Science and Technology, University of Maryland, College Park, Maryland 20742, USA
5. School of Space Research, Kyung Hee University, Yongin, Gyeonggi 446-701, South Korea
6. University of Iowa, Iowa City, Iowa 52242, USA
7. ISR-1 Space Science and Applications, Los Alamos National Laboratory, New Mexico 87545, USA
8. The New Mexico Consortium, New Mexico, New Mexico 87544, USA