Abstract: A digital bathymetry model according to principle of multi-beam bathymetric sonar system is designed, and a correction method of water depth survey due to effect of angular beamwidth is given. Accordingly, terrain maps are constructed to mimic the realtime terrain. The model and correction are verified by using practical water depth data of certain seafloor. Simulation results show that the model is in accordance with theoretical analysis and practical situation, and the correction effect of water depth is obvious.

Key words: multi-beam digital bathymetry model, angular beamwidth, footprint, terrain map

摘要： 建立了多波束系统数字测深与波束角效应改正模型。根据多波束系统工作原理，建立多波束系统数字水深测量模型，对其中波束角效应产生的测深影响进行改正，进而模拟测量了海底地图，并以实际海底水深数据进行检验。结果表明，该模型比较符合理论分析及实际情况，测深改正效果明显。

关键词: 多波束数字测深模型, 波束角, 脚印, 地图