• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>The Hydrographic journal >THE EFFECT OF REFRACTION ON OBLIQUE ANGLES OF MULTIBEAM ECHO-SOUNDERS DUE TO SOUND SPEED CHANGES THROUGH THE WATER COLUMN
【24h】

THE EFFECT OF REFRACTION ON OBLIQUE ANGLES OF MULTIBEAM ECHO-SOUNDERS DUE TO SOUND SPEED CHANGES THROUGH THE WATER COLUMN

机译：折射对水柱声速变化的影响对多波束回声测角的倾斜角的影响

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

This study investigated the effect of sound refraction in the water column on the accuracy of depths calculated from oblique swath angles of Multibeam Echosounders. This was accomplished by analysing data collected from the Tamar Estuary, Plymouth Sound and the Northeast Atlantic Ocean. Sound speed was computed from this data using the Chen and Millero, MacKenzie and Medwin formulae for the estimation of sound speed in seawater. Resulting values were graphed as sound velocity profiles and barographs thus visually illustrating discrepancies in sound speed estimation between the three sound speed formulae, leading to the conclusion that the sound speed formula used for the calculation of sound speed in the water column is a source of error related to the horizontal position in a charted depth. The analysis then utilised ray tracing to compare the horizontal distance a sound ray refracted in the water column from sound pulses emitted at near vertical and oblique angles. In all analysis, the extent of refraction increased as the swath angle increased as did the error between the estimated sound speeds from the Chen and Millero, MacKenzie and Medwin formulae. This study concludes the sound velocity formula used to compute sound speed in the water column and refraction at large oblique angles of Multibeam sonars contribute to errors associated with outer swaths of Multibeam sonars, thus contributing error to the horizontal position of chart depths.
机译：这项研究调查了水柱中声折射对根据多波束回声测斜仪倾斜倾斜角计算出的深度精度的影响。这是通过分析从添马舰河口，普利茅斯湾和东北大西洋收集的数据来完成的。使用Chen和Millero，MacKenzie和Medwin公式从该数据计算声速，以估算海水中的声速。将结果值绘制成声速剖面图和柱状图，从而直观地说明三个声速公式之间的声速估算差异，从而得出结论，用于计算水柱声速的声速公式是误差的来源与绘制深度中的水平位置有关。然后，该分析利用光线跟踪来比较在近垂直和倾斜角度发射的声脉冲在水柱中折射的声线的水平距离。在所有分析中，折射度随the角的增加而增加，Chen和Millero，MacKenzie和Medwin公式估计的声速之间的误差也随折射角的增加而增加。这项研究得出的声速公式用于计算水柱中的声速，并且多波束声纳大倾斜角处的折射会导致与多波束声纳的外部条带相关的误差，从而导致误差对海图深度的水平位置产生影响。

著录项

  • 来源
    《The Hydrographic journal》 |2004年第113期|p.15-20|共6页
  • 作者

    Desiree Batton;

  • 作者单位

    United States Strategic Command, Offutt Air Force Base, Omaha, Nebraska, USA;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 海洋学;
  • 关键词

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号