Research on the direction estimation algorithm of vector hydrophones under near-field and Far-field Reflecting BoundaryZhenzhen Shang, Xiaoyong Zhang, Hairong Kou, Libo Yang and Guojun ZhangInt. J. Metrol. Qual. Eng., 17 (2026) 3DOI: https://doi.org/10.1051/ijmqe/2025012