GNSS-A seafloor geodetic observation along the Japan Trench and the Nankai Trough conducted by the Japan Coast Guard

Yuto Nakamura1, Tadashi Ishikawa1, Shun-ichi Watanabe1, Koya Nagae1 and Yusuke Yokota2, (1)Japan Coast Guard, Hydrographic and Oceanographic Department, Tokyo, Japan, (2)University of Tokyo, Institute of Industrial Science, Tokyo, Japan