多波束声呐后向散射数据角度响应模型的改进算法

针对多波束后向散射数据的角度响应(AR)影响显著而现有角度响应模型在复杂底质环境下不完善导致多波束声呐图像质量偏低的问题,给出了一种改进的角度响应模型和改正方法。首先通过对多次声呐脉冲(Ping)数据平均获得角度响应曲线,然后给出了角度响应参数的提取方法,在此基础上研究并给出了单次脉冲内不同区段的改正模型,最终实现了多波束后向散射数据的角度响应影响减弱。试验验证了该方法的有效性。

Study on Improvement of Multibeam Backscatter Angular Response Model

Because multibeam backscatter data is greatly affected by the AR (angular response)and the AR correction models are not perfect in the complex seabed,the multibeam image quality is seriously reduced.This paper puts forward an improved AR model and a correction method.Firstly,we average continual pings to obtain the AR curve;Secondly,we give out the extraction method of AR parameters;Thirdly,we use the parameters to establish the improved AR model of different sections of one ping;Finally,we use the model to weaken the AR effect in multibeam backscatter images.The validities of the method have been verified by the experiments of the field multibeam acoustic backscatter.