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Field measurements of surface waves using a 5-beam ADCP

机译：使用5光束ADCP进行表面波的现场测量

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This study examines the performance of an improved 5-beam ADCP, with a vertical beam, when deployed to measure non-directional waves in waters of 40 m depth. To assess the performance, the ADCP is compared with four co-located directional wave buoys. The surface elevation spectra as measured by the vertical beam compare well with estimates from the buoys in the range 0.10-0.35 Hz. Except for peak period, spectral estimates of wave height, mean energy period and spectral bandwidth from the vertical beam agree well with estimates from the buoys, showing only small differences of 2-7%. Some cases exist where either the ADCP or the buoys can resolve particular wave systems that the other sensor cannot resolve, though some of these instances may be the result of numerical artefact. At low frequencies, the ADCP shows a better sensitivity to swell components, and though the buoys can produce low frequency peaks, the difference between the two sensors is particularly evident during low energy sea states. At high frequencies, both sensors may show susceptibility to noise. The study intends to increase the level of confidence in using a 5-beam ADCP with a vertical beam, and of its comparative performance with a different wave sensor. (C) 2015 Elsevier Ltd. All rights reserved.
机译：这项研究检查了改进的5光束ADCP在垂直光束中的性能，该ADCP可以测量40 m深度的水中的非定向波。为了评估性能，将ADCP与四个并置的定向波浮标进行比较。垂直光束测得的表面仰角光谱与浮标在0.10-0.35 Hz范围内的估计值很好地比较。除高峰期外，垂直波束的波高，平均能量周期和频谱带宽的频谱估计值与浮标的估计值非常吻合，仅显示出2-7％的微小差异。在某些情况下，ADCP或浮标都可以解析另一个传感器无法解析的特定波浪系统，尽管其中一些实例可能是数字假象的结果。在低频时，ADCP对膨胀组件表现出更好的灵敏度，尽管浮标可以产生低频峰值，但在低能海况下，两个传感器之间的差异尤为明显。在高频下，两个传感器都可能表现出对噪声的敏感性。这项研究旨在提高使用带有垂直光束的5光束ADCP的置信水平，以及使用不同的波传感器时的比较性能。 （C）2015 Elsevier Ltd.保留所有权利。

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