Woo Kyoung Lee^1,2, Hyosub Kil³, Byung-Kyu Choi¹, Yang Tae-yong¹ and Young-Sil Kwak^1,2, (1)Korea Astronomy and Space Science Institute, Daejeon, South Korea, (2)University of Science and Technology, Daejeon, South Korea, (3)The Johns Hopkins University Applied Physics Laboratory, Laurel, MD, United States