中国沿岸海域深度基准框架点布设研究

根据已有深度基准面模型,研究了深度基准面在不同方向的非线性变化程度,并且从深度测量的极限误差出发,推算得到深度基准面内插的极限精度要求,二者结合确定深度基准面线性内插的有效范围。实验结果证实,潮波传播特征差异会导致深度基准面线性内插有效范围的差异。最后,结合深度基准面线性内插的有效范围,在渤海湾部分沿岸海域设计了框架点的布设方案。

Research on the layout of depth datum frame points in China coastal waters

Based on the existing depth datum model,the nonlinear variation degree of the depth datum in different directions was studied.And according to the limit error of depth measurement,the limit precision requirements of depth datum interpolation was deduced.The effective range of linear interpolation of depth datum was determined by combining the two factors.The experimental results show that the difference of tidal wave propagation characteristics leads to the difference of effective range of depth datum.Finally,according to the effective range of linear interpolation of depth datum,the layout scheme of frame points was designed in coastal waters of Bohai Bay.