顾及声线弯曲的横摇偏差迭代算法  

An Iterative Algorithm for Roll Offset Considering the Bending of Sound Ray

作　　者：刘国庆 金绍华[1] 尤宝平[1] 朱穆华[1] LIU Guoqing;JIN Shaohua;YOU Baoping;ZHU Muhua(Department of Hydrography and Cartography,Dalian Naval Academy,Dalian 116018,China)

机构地区：[1]海军大连舰艇学院海洋测绘系,辽宁大连116018

出　　处：《海洋测绘》2018年第4期39-42,共4页Hydrographic Surveying and Charting

基　　金：国家自然科学基金(41576105)

摘　　要：横摇偏差校准是多波束水深测量测前准备的一项重要内容。针对传统多波束横摇偏差校准操作复杂且存在主观因素问题,同时考虑到横摇偏差引起海底地形失真的非线性变化,提出了顾及声线弯曲的横摇偏差自动迭代算法。该算法以平坦海底为假设,基于常梯度声线跟踪模型和最小二乘原理,对多Ping数据进行迭代拟合,最后取其平均值作为横摇偏差。仿真分析结果表明,迭代算法能逐步调整横摇偏差引起的海底地形非线性失真,提高横摇偏差计算值的准确性。The calibration for roll offset is an important part of preparation for multi-beam sounding. Aiming at the complexity and subjective factors of the traditional calibratiion for multi-beam roll offset, considering the nonHaear variation of the terrain distortion caused by roll offset, an automatic iterative algorithm for roll offset considering the bending of sound ray is proposed.Based on the assumption of a flat seafloor,the algorithm fits the multi-ping data iteratively based on the constant-gradient sound ray tracking model and the least squares principle, and finally takes the average as the roll offset.The simulation results show that the iterative algorithm can gradually adjust the nonlinear distortion of the seafloor caused by roll offset, and improve the accuracy of the calculation for roll offset iterative.

关 键 词：多波束测深 横摇偏差 声线弯曲 地形倾角 最小二乘 迭代算法 

分 类 号：P229[天文地球—大地测量学与测量工程]