顾及声线弯曲的横摇偏差迭代算法
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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 nonlinear 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 showthat 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.
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 nonlinear 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 showthat 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.
引文
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[4]张志伟,暴景阳,刘晟.平面拟合法校正多波束换能器横向安装偏差[J].海洋通报,2017,36(4):394-398.
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[11]朱小辰,刘雁春,肖付民,等.多波束测深外业数据提取与显示系统设计与开发[J].海洋测绘,2012,32(1):22-24.
[12]李家彪,郑玉龙,王小波,等.多波束测深及影响精度的主要因素[J].海洋测绘,2001,21(1):26-32.
[13]朱庆,李德仁.多波束测深数据的误差分析与处理[J].武汉测绘科技大学学报,1998,23(1):3-6+48.
[14]赵建虎,刘经南,阳凡林.多波束测深数据系统误差的削弱方法研究[J].武汉大学学报:信息科学版,2004,29(5):394-397.
[2]张志伟,暴景阳,肖付民.多波束换能器安装偏差对海底地形测量的影响[J].海洋测绘,2016,36(1):51-54.
[3]孙文川,暴景阳,金绍华,等.一种多波束换能器横摇角度偏差二次校准方法[J].武汉大学学报:信息科学版,2016,41(11):1440-1444.
[4]张志伟,暴景阳,刘晟.平面拟合法校正多波束换能器横向安装偏差[J].海洋通报,2017,36(4):394-398.
[5]刘方兰,张志荣,余平.多波束系统横摇、纵倾参数的校正方法[J].吉林大学学报:地球科学版,2004,34(4):621-624.
[6]王闰成.多波束测深系统的安装校准[J].海洋测绘,2003,23(1):34-37.
[7]张海涛,唐秋华,周兴华,等.多波束测深系统换能器的安装校准分析[J].海洋通报,2009,28(1):102-107.
[8]韩李涛,阳凡林,孔巧丽,等.多波束测深系统校正参数求解方案及可视化实现[J].测绘科学,2011,36(4):108-110.
[9]孙强,李明叁,王洪燕,等.多波束测深系统声线跟踪方法对比分析[J].海洋测绘,2015,35(2):48-51.
[10]孙文川,肖付民,金绍华,等.加权最小二乘估计的多波束声强数据归一化方法[J].测绘科学技术学报,2012,29(4):262-266.
[11]朱小辰,刘雁春,肖付民,等.多波束测深外业数据提取与显示系统设计与开发[J].海洋测绘,2012,32(1):22-24.
[12]李家彪,郑玉龙,王小波,等.多波束测深及影响精度的主要因素[J].海洋测绘,2001,21(1):26-32.
[13]朱庆,李德仁.多波束测深数据的误差分析与处理[J].武汉测绘科技大学学报,1998,23(1):3-6+48.
[14]赵建虎,刘经南,阳凡林.多波束测深数据系统误差的削弱方法研究[J].武汉大学学报:信息科学版,2004,29(5):394-397.