深度约束的浅海多目标声学定位方法

针对浅海地震勘探声学二次定位中存在垂直观测结构欠佳的问题，使用船载DGPS数据和单波束测深数据，给出基于深度约束的浅海多目标水声定位解算方法；结合区域自然邻点空间插值法，构建区域高程模型，并对抗差估计解（IGG3）的水平位置进行应答器高程内插。根据对称性观测和施工海域的平坦地形，结合声线弯曲分段参数化模型进一步消除声线弯曲误差，以提高浅海水下多目标的平面定位精度。南海实测结果证明，在声速测量不准且观测数据粗差较大的情况下，所提方法构建模型具有较强抗粗差性能，且显著提高了定位精度。

A depth-constraint multi-target positioning acoustic approach in shallow waters

A depth-constraint multi-target positioning acoustic approach in shallow waters is proposed in this paper using shipborne DGPS data and single-beam sounding data.Combined with the spatial interpolation method of regional natural critical points,a regional elevation model is built,and the transponder elevation interpolation is carried out for the horizontal position of IGG3 tolerance estimation solution.According to the symmetry observation and the smooth seabed topography in the working area,bending errors of acoustic line are further eliminated with an acoustic line bending segmented model in order to improve the planar positioning accuracy of multi-targets in shallow waters.Experimental results in the South China Sea show that the model built by the proposed approach is characterized by strong anti-gross-error capability and can effectively improve the positioning accuracy under the conditions of inaccurate sound velocity measurements and observation data with large gross errors.