| 基于严密波束归位模型的多波束测深点不确定度改进方法 |
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| 引用本文： | 曲萌,樊妙,卜宪海,孙毅,阳凡林.基于严密波束归位模型的多波束测深点不确定度改进方法[J].海洋通报,2018(6):643-651. |
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| 作者姓名： | 曲萌 樊妙 卜宪海 孙毅 阳凡林 |
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| 作者单位： | 山东科技大学 测绘科学与工程学院，山东 青岛 266590； 海岛 （礁） 测绘技术国家测绘地理信息局重点实验室，山东 青岛 266590,国家海洋信息中心，天津 300171,山东科技大学 测绘科学与工程学院，山东 青岛 266590； 海岛 （礁） 测绘技术国家测绘地理信息局重点实验室，山东 青岛 266590,国家海洋信息中心，天津 300171,山东科技大学 测绘科学与工程学院，山东 青岛 266590； 海岛 （礁） 测绘技术国家测绘地理信息局重点实验室，山东 青岛 266590 |
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| 基金项目： | 国家重点研发计划课题 （2017YFC1405006）；山东省重点研发计划项目 （2018GHY115002） |
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| 摘 要： | 利用不确定度可有效对多波束测深成果质量进行评估,针对现有不确定度计算模型因近似或简化导致一定误差的问题,本文提出一种基于严密波束归位模型的多波束测深点不确定度改进方法。首先分析了多波束测深过程中的各项误差源,基于误差传播定律与严密波束归位模型,详细推导了各误差源在波束归位各阶段的误差传播情况,最终得出了多波束测深成果不确定度的计算模型。文中利用实测数据计算了每个测深点的不确定度,绘制了单Ping扇面及条带的不确定度分布图,有利于直观、全面地了解所有测深点的误差变化趋势;计算结果与常用HGM不确定度模型进行了对比,表明本文方法更具合理性,对多波束测深成果的质量评估具有一定的参考价值。
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| 关 键 词： | 多波束 误差传播定律 波束归位 不确定度 质量评估 |
| 收稿时间： | 2018/3/12 0:00:00 |
| 修稿时间： | 2018/5/30 0:00:00 |
Uncertainty calculation of multibeam echo sounder based on accurate reduction model of footprints |
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| QU Meng,FAN Miao,BU Xian-hai,SUN Yi and YANG Fan-lin.Uncertainty calculation of multibeam echo sounder based on accurate reduction model of footprints[J].Marine Science Bulletin,2018(6):643-651. |
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| Authors: | QU Meng FAN Miao BU Xian-hai SUN Yi and YANG Fan-lin |
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| Institution: | College of Geomatics, Shandong University of Science and Technology, Qingdao 266590, China; Key Laboratory of Surveying and Mapping Technology on Island and Reef, National Administration of Surveying, Mapping and Geoinformation, Qingdao 266590, China;,National Marine Data and Information Service, Tianjin 300171, China,College of Geomatics, Shandong University of Science and Technology, Qingdao 266590, China; Key Laboratory of Surveying and Mapping Technology on Island and Reef, National Administration of Surveying, Mapping and Geoinformation, Qingdao 266590, China;,National Marine Data and Information Service, Tianjin 300171, China and College of Geomatics, Shandong University of Science and Technology, Qingdao 266590, China; Key Laboratory of Surveying and Mapping Technology on Island and Reef, National Administration of Surveying, Mapping and Geoinformation, Qingdao 266590, China; |
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| Abstract: | Uncertainty can be used to effectively evaluate the quality of multibeam sounding results. To solve the problem of simplification or approximate error of existing models, a method for calculating the uncertainty of multibeam sounding points based on a accurate reduction model of footprints is proposed. Firstly, the error sources in multibeam sounding are analyzed. Then, based on the law of error propagation and the accurate reduction model of beam footprint, the error propagation of each error source in each phase of beam reduction is deduced in detail. Finally, the uncertainty model of multibeam sounding results is obtained. To test the validity of the method, some in-situ measurements are used to calculate the uncertainty of each sounding point, and the uncertainty distribution of single ping and whole strip are plotted, which are helpful to intuitively and comprehensively identify the error change trend of all sounding points. Compared with the usual HGM uncertainty model, the calculation results of this proposed method is more reasonable and thus has some reference value for the quality evaluation of the multi-beam sounding results. |
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| Keywords: | multibeam law of error propagation reduction model of footprints uncertainty quality evaluation |
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