Collaborative Research: Calibrating Multibeam Sonars for Surveying Midwater Fish

合作研究：校准多波束声纳以测量中层水域鱼类

• 批准号: 0002842
• 负责人: Larry Mayer
• 金额: $ 34.29万
• 依托单位: University of New Hampshire
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2000
• 资助国家: 美国
• 起止时间: 2000-12-15 至 2004-11-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0002842&HistoricalAwards=false
• 关键词: Collaborative; Research; Calibrating; Multibeam; Sonars

This collaborative project between the Woods Hole Oceanographic Institution and the University of New Hampshire addresses an ocean science and fisheries management requirement for improved capabilities for measuring the abundance and distribution of fish and other organisms in the open ocean. Newly available multibeam echo sounders provide the capability to record and analyze acoustic returns on individual beams, which represents a new capability for the ocean research community. A multibeam echo sounder will be tested and calibrated in three venues: fresh-water test tank, sea-well test facility, and in situ on a towed vehicle. The objectives of this calibration exercise are the determination of the on-axis response, sensitivity limits, hence dynamic range, and directivity patterns for each beam. The use of acoustic measurements for fish stock abundance and other research applications has been established, but the potential for measuring the numerical density of fish is difficult without a means of calibrating the system in situ. Results from this sonar calibration project will provide a means for attaining better areal coverage without compromising spatial resolution.

伍兹霍尔海洋学研究所和新罕布什尔州大学之间的这一合作项目涉及海洋科学和渔业管理的一项要求，即提高测量公海鱼类和其他生物的丰度和分布的能力。 新的多波束回声测深仪提供了记录和分析单个波束回声回波的能力，这代表了海洋研究界的一种新能力。 多波束回声测深仪将在三个地点进行测试和校准：淡水试验池、水井试验设施和在拖曳车辆上进行现场测试。校准工作的目的是确定轴上响应、灵敏度极限，从而确定动态范围和每个波束的方向性模式。利用声学测量鱼类资源丰度和其他研究用途的做法已经确立，但如果没有在现场校准系统的手段，就很难测量鱼类的数量密度。该声纳校准项目的结果将提供一种在不影响空间分辨率的情况下实现更好的区域覆盖的手段。