Abstract

Today, numerous scientific echosounders are used as continuously monitoring systems in ocean observatories. These echosounders are usually calibrated in shallow water, either in laboratory tanks or at random ocean docks before deployments. If the systems are used for quantitative measurements by the observatories, they should be calibrated at the operating depths to consider the environmental effects on the calibration parameters. In this article, a simple in situ calibration method is presented, which was recently applied to one of the nodes of the Norwegian Lofoten-Vesterålen ocean observatory, when the research vessel with dynamic positioning system suspended and moved the calibration sphere between the vessel and the transducer. The calibration results of a 70-kHz split-beam echosounder demonstrate that this method can be applied to the cabled observatories.

中文翻译：

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天文台宽带回声测深仪的原位校准

摘要

如今，许多科学的回声测深仪被用作海洋观测站的连续监测系统。这些回声测深仪通常在部署前在浅水，实验室水箱或随机海洋码头中进行校准。如果将系统用于天文台的定量测量，则应在操作深度进行校准，以考虑环境因素对校准参数的影响。在本文中，一个简单的就地提出了一种校准方法，该方法最近被应用于挪威Lofoten-Vesterålen海洋天文台的一个节点，当时带有动态定位系统的研究船悬挂并在船和传感器之间移动了校准球。70 kHz分离光束回声测深仪的校准结果表明，该方法可以应用于有线天文台。