1. Research Engineer, LIG Nex1 Co. Ltd., 207 Mabuk-ro, Giheung-gu, Yongin-si, Gyeonggi-do 16911, Korea.
2. Doctoral Student, Space Technology Synthesis Laboratory, Dept. of Aerospace Engineering, Chosun Univ., 375 Seosuk-dong, Dong-gu, Gwangju 501-759, Korea.
3. Postdoctoral Researcher, School of Mechatronics, Gwangju Institute of Science and Technology, 123 Cheomdangwagi-ro, Buk-gu, Gwangju 500-712, Korea.
4. Professor, Space Technology Synthesis Laboratory, Dept. of Aerospace Engineering, Chosun Univ., 375 Seosuk-dong, Dong-gu, Gwangju 501-759, Korea (corresponding author).