New approach for GNSS-A analysis with simultaneous estimation of seafloor position and sound speed variation

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