State Key Laboratory of Satellite Ocean Environment Dynamics, Second Institute of Oceanography, Ministry of Natural Resources, Hangzhou 310012, China
Southern Laboratory of Ocean Science and Engineering (Zhuhai), Zhuhai 519082, China
School of Oceanography, Shanghai Jiao Tong University, Shanghai 200030, China
The Scientific Research Fund of Second Institute of Oceanography, MNR, under contract Nos QNYC2102, JZ2001 and JT1801; the National Natural Science Foundation of China under contract Nos 41920104006, 41906023, 41806020, 41776107, 41906024 and 41976001; the Project of State Key Laboratory of Satellite Ocean Environment Dynamics, SIO under contract No. SOEDZZ2106.
Figure 1. Location map of the PDS-IES stations (C1 and C2) and trajectories of PDSs after reaching the surface (February 10 and 1 for C1 and C2, respectively) (a). A photo of PDS-IES before deployment (b). The instrument in the middle is IES, which is surrounded by 4 PDSs.
Figure 2. The round-trip acoustic travel time (τ), bottom pressure, and near bottom velocities for C1 and C2.