| EOF重构声速剖面对深水多波束的声速改正分析 |
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| 引用本文： | 张孝首,周兴华,唐秋华,王盼龙,丁继胜,王永康.EOF重构声速剖面对深水多波束的声速改正分析[J].海岸工程,2020,39(1):34-43. |
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| 作者姓名： | 张孝首 周兴华 唐秋华 王盼龙 丁继胜 王永康 |
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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;自然资源部第一海洋研究所,山东青岛266061,山东科技大学测绘科学与工程学院,山东青岛266590;自然资源部第一海洋研究所,山东青岛266061,山东科技大学测绘科学与工程学院,山东青岛266590;自然资源部第一海洋研究所,山东青岛266061,山东科技大学测绘科学与工程学院,山东青岛266590;自然资源部第一海洋研究所,山东青岛266061,山东科技大学测绘科学与工程学院,山东青岛266590;自然资源部第一海洋研究所,山东青岛266061,自然资源部第一海洋研究所,山东青岛266061 |
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| 基金项目： | 国家重点研发计划项目——海上搜寻演示验证技术与评估 |
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| 摘 要： | 声速误差是多波束水深地形测量主要误差源之一,通常采用现场声速剖面测量的方式加以改正,但在深远海多波束水深地形测量时,现场获取全深度的声速剖面并非易事。针对这一问题,利用东南印度洋海洋调查工作中采集到的17个站位的CTD数据,将所有站位声速剖面拓展到全深度,采用经验正交函数分析法(Empirical Orthogonal Functions,EOF)构建调查区声速剖面场,可获得声速剖面场内任意一点的声速值。然后通过EOF重构声速剖面场获得的声速值对测区内多波束水深地形数据进行改正,并与实测声速剖面对多波束水深地形数据的改正结果进行对比,结果表明,5000 m水深范围内2种声速改正结果相差很小,EOF重构法对深水多波束的声速改正满足水深测量的要求。
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| 关 键 词： | C.C.Leroy算法 EOF 声速剖面 多波束 |
Analysis on Correction of Deep Water Multi-beam Sound Velocity Using Sound Velocity Profiles Reconstructed by EOF |
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| ZHANG Xiao-shou,ZHOU Xing-hua,TANG Qiu-hua,WANG Pan-long,DING Ji-sheng,WANG Yong-kang.Analysis on Correction of Deep Water Multi-beam Sound Velocity Using Sound Velocity Profiles Reconstructed by EOF[J].Coastal Engineering,2020,39(1):34-43. |
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| Authors: | ZHANG Xiao-shou ZHOU Xing-hua TANG Qiu-hua WANG Pan-long DING Ji-sheng WANG Yong-kang |
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| Institution: | (College of Geodesy and Geomatics, Shandong University of Science and Technology, Qingdao 266590, China;First institute of oceanography, MNR, Qingdao 266061, China) |
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| Abstract: | Sound velocity error is one of the main error sources in multi-beam bathymetric survey and is usually corrected by in-situ measurement of sound velocity profile.However,it is not easy to obtain a full depth sound velocity profile in the field.For solving this problem,CTD data collected at 17 stations during the survey in the Southeast Indian Ocean are applied and the sound velocity profiles obtained at all the stations are expanded to a full depth.And then,the Empirical Orthogonal Function(EOF)method is used to reconstruct the sound velocity profile field in the survey area.Thus,the value of sound velocity at any point in the sound velocity profile field can be obtained.The sound velocity values thus obtained are used to correct the multi-beam bathymetric data in the survey area,and the corrected results are compared with those obtained by using the measured sound velocity profiles.It is shown that within the depth range of 5000 m the results from the two types of sound velocity corrections have very small differences,indicating that the correction of deep water multi-beam sound velocity by using the EOF reconstruction method can meet the requirements of bathymetric surveys. |
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| Keywords: | C C Leroy algorithm EOF sound velocity profile multi-beam |
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