Shcherbina Andrey Y, D'Asaro Eric A, Nylund Sven
Applied Physics Laboratory, University of Washington, Seattle, Washington.
Nortek AS, Rud, Norway.
J Atmos Ocean Technol. 2018 Feb;35(2):411-427. doi: 10.1175/jtech-d-17-0108.1. Epub 2018 Mar 1.
This paper describes the instrumentation and techniques for long-term targeted observation of the centimeter-scale velocity structure within the oceanic surface boundary layer, made possible by the recent developments in capabilities of autonomous platforms and self-contained pulse-coherent acoustic Doppler current profilers (ADCPs). Particular attention is paid to the algorithms of ambiguity resolution ("unwrapping") of pulse-coherent Doppler velocity measurements. The techniques are demonstrated using the new Nortek Signature1000 ADCP mounted on a Lagrangian float, a combination shown to be capable of observing ocean turbulence in a number of recent studies. Statistical uncertainty of the measured velocities in relation to the ADCP setup is also evaluated. Described techniques and analyses should be broadly applicable to other autonomous and towed applications of pulse-coherent ADCPs.
本文描述了用于长期目标观测海洋表面边界层内厘米级速度结构的仪器和技术，这得益于自主平台和独立式脉冲相干声学多普勒流速剖面仪（ADCP）能力的最新发展。特别关注了脉冲相干多普勒速度测量的模糊度分辨率（“解缠”）算法。使用安装在拉格朗日浮标上的新型Nortek Signature1000 ADCP演示了这些技术，在最近的一些研究中，这种组合已被证明能够观测海洋湍流。还评估了与ADCP设置相关的测量速度的统计不确定性。所描述的技术和分析应广泛适用于脉冲相干ADCP的其他自主和拖曳应用。
