考虑声线弯曲和深度约束的海洋大地基准网定位仿真分析

Simulative analysis of a marine geodetic network for positioning considering the acoustic ray bend and depth constraint

为了优化海洋大地基准网性能,本文研究了附加深度约束的海洋大地基准网定位方法及其观测模型设计矩阵解法,在此基础上考虑声传播路径弯曲,仿真分析了综合声学浮标、潜标和海底基站的海洋大地基准网定位性能。结果表明,潜标深度和基站间距均影响基准网的有效测站个数分布,且基站间距影响基准网的信号覆盖范围,适当扩大基站间距和增加潜标深度可有效提高基准网定位精度。相关结果可为海洋大地基准网的建设及应用提供参考。

To improve the performance of a marine geodetic network,we investigated a positioning method with depth constraints and an expression of the design matrix for observation modeling,applying the marine geodetic net-work by integrating acoustic buoys,submerged buoys,and seafloor base stations.Accordingly,we simulated and analyzed the performance of the marine geodetic network positioning considering the acoustic ray bend.The simula-tion results show that the depth of a submerged buoy and the distance between base stations influence the distribu-tion of effective stations,while the latter parameter also affects the coverage range of the marine geodetic network.Moreover,appropriately expanding the distance between base stations and increasing the depth of submerged buoys can effectively enhance the positioning accuracy of the marine geodetic network.These results can be applied to the construction and application of marine geodetic networks.