1. NEC TOSHIBA Space Systems, Ltd., 1–10 Nisshin-cho, Fuchu, Tokyo 183-8551, Japan
2. Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency, 3-1-1 Yoshinodai, Chuo-ku, Sagamihara, Kanagawa 252-5210, Japan
3. University of Tokyo, Department of Aeronautics and Astronautics, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan
4. NEC Corporation, 1–10 Nisshin-cho, Fuchu, Tokyo 183-8551, Japan