2011 IEEE/OES 10th Current, Waves and Turbulence Measurements (CWTM)最新文献_第3页

Turbulence measurements in a jet: Comparing the vectrino and vectrinoii 射流湍流测量:矢量与矢量的比较

2011 IEEE/OES 10th Current, Waves and Turbulence Measurements (CWTM) Pub Date : 2011-03-20 DOI: 10.1109/CWTM.2011.5759547

L. Zedel, A. Hay

引用次数: 18

A summary of quality control tests for waves and in situ currents and their effectiveness 波浪和原位电流的质量控制试验及其有效性综述

2011 IEEE/OES 10th Current, Waves and Turbulence Measurements (CWTM) Pub Date : 2011-03-20 DOI: 10.1109/CWTM.2011.5759534

S. Haines, R. Crout, J. Bosch, W. Burnett, J. Fredericks, D. Symonds, Julie Thomas

引用次数: 1

Voyage to the bottom of the Puerto Rico Trench: Tales from a free fall current meter 航行到波多黎各海沟底部:从一个自由落体电流计的故事

2011 IEEE/OES 10th Current, Waves and Turbulence Measurements (CWTM) Pub Date : 2011-03-20 DOI: 10.1109/CWTM.2011.5759538

W. Schmidt, E. Siegel

引用次数: 1

HF radar observations in the German Bight: Measurements and quality control 德国海域的高频雷达观测:测量和质量控制

2011 IEEE/OES 10th Current, Waves and Turbulence Measurements (CWTM) Pub Date : 2011-03-20 DOI: 10.1109/CWTM.2011.5759524

K. Gurgel, T. Schlick, G. Voulgaris, J. Seemann, F. Ziemer

{"title":"HF radar observations in the German Bight: Measurements and quality control","authors":"K. Gurgel, T. Schlick, G. Voulgaris, J. Seemann, F. Ziemer","doi":"10.1109/CWTM.2011.5759524","DOIUrl":"https://doi.org/10.1109/CWTM.2011.5759524","url":null,"abstract":"In the South-Eastern part of the North Sea, known as the German Bight, the Helmholz-Zentrum Gessthacht (HZG, former GKSS Research Center) is currently installing the experimental observation Network “Coastal Observing System for Northern and Arctic Seas” (COSYNA). The main components of COSYNA include in situ instruments, a network of High-Frequency over-the-horizon (HF) radars currently consisting of three “WEllen RAdar” (WERA) systems installed on the islands of Wangerooge and Sylt, and close to the harbour of Büsum, as well as numerical models which are linked to the radar measurements by data assimilation. The WERA HF radar system was developed at the University of Hamburg in 1996. A commercial version is available since 2000. As WERA uses FMCW modulation for range resolution, there is no blind range in front of the system and data are available very close to the shore line. Azimuthal and range resolutions are ±3° and 1.5 km, respectively with a maximum range of 120 km. Ocean current maps are created three times an hour. Operation of the HF radar systems started during summer 2010. The three radial components of the current field as measured by the WERA radars are transfered to a central server at HZG, where they are quality checked and combined to give 2-D current maps. Radial components and 2-D maps are archived in a database and made available to the numerical model system. COSYNA provides a web-based interface to make the 2-D maps, as well as the model results available to the public. This paper describes details of the HF radar network including the procedures to reduce the impact of Radio Frequency Interference (RFI) on the measured ocean current maps and to control the quality of the data.","PeriodicalId":345178,"journal":{"name":"2011 IEEE/OES 10th Current, Waves and Turbulence Measurements (CWTM)","volume":"242 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122630044","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 15

High Resolution Doppler profiler measurements of turbulence from a profiling body 高分辨率多普勒剖面仪对剖面体湍流的测量

2011 IEEE/OES 10th Current, Waves and Turbulence Measurements (CWTM) Pub Date : 2011-03-20 DOI: 10.1109/CWTM.2011.5759562

P. Rusello, E. Siegel, M. Alford

引用次数: 5

Performance of the nortek Aquadopp Z-Cell Profiler on a NOAA surface buoy nortek Aquadopp Z-Cell剖面仪在NOAA海面浮标上的性能

2011 IEEE/OES 10th Current, Waves and Turbulence Measurements (CWTM) Pub Date : 2011-03-20 DOI: 10.1109/CWTM.2011.5759554

E. Siegel, R. Riley, K. Grissom

{"title":"Performance of the nortek Aquadopp Z-Cell Profiler on a NOAA surface buoy","authors":"E. Siegel, R. Riley, K. Grissom","doi":"10.1109/CWTM.2011.5759554","DOIUrl":"https://doi.org/10.1109/CWTM.2011.5759554","url":null,"abstract":"Observations of current velocity in near-surface and near-bottom boundary layers are critically important for many scientific, operational, and engineering applications. Nortek developed the Aquadopp Z-Cell Profiler, a dual-frequency, six-beam acoustic Doppler current profiler, to meet the needs of observing the complete water column velocity profile, including the near-surface or near-bottom currents. The Aquadopp Z-Cell Profiler employs three acoustic beams directed horizontally and spaced equally around the circumference of the profiler with 120 deg spacing between the beams. These beams measure the two-component horizontal currents at the level of the instrument (cell zero), thereby eliminating the common blanking distance associated with standard ADCP's. Near-surface and water column current velocity profile observations from a Z-Cell Profiler mounted on a NOAA NDBC 3 m discus buoy (located in the northern Gulf of Mexico) are compared with current velocity profile measurements from a bottom mounted 600 kHz Nortek AWAC and 600 kHz Teledyne RD Instruments Workhorse acoustic Doppler current profiler. A tidal analysis suggests that velocity data from the horizontal beams (cell zero) are of good quality and consistent in direction and magnitude with the velocity measurements in cells below, with the AWAC and Workhorse velocity, and with theory. Several cases are presented that indicate the measurements in cell zero are important to make independent of velocity lower in the water column in order to correctly characterize the flow regime. Current speed and direction differences between cell zero and lower cells project a horizontal spatial separation of water parcels as much as 20 km/day, with a mean separation of 8.5 km/day.","PeriodicalId":345178,"journal":{"name":"2011 IEEE/OES 10th Current, Waves and Turbulence Measurements (CWTM)","volume":"155 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115924053","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Error assessment of HF radar-based ocean current measurements: An error model based on sub-period measurement variance 高频雷达海流测量误差评估:基于子周期测量方差的误差模型

2011 IEEE/OES 10th Current, Waves and Turbulence Measurements (CWTM) Pub Date : 2011-03-20 DOI: 10.1109/CWTM.2011.5759527

K. Laws, J. Vesecky, J. Paduan

{"title":"Error assessment of HF radar-based ocean current measurements: An error model based on sub-period measurement variance","authors":"K. Laws, J. Vesecky, J. Paduan","doi":"10.1109/CWTM.2011.5759527","DOIUrl":"https://doi.org/10.1109/CWTM.2011.5759527","url":null,"abstract":"Data from CODAR-type ocean current sensing radar systems are used here to evaluate the performance of an error indicator provided as part of the available radar data. Investigations are based on data from pairs of radar systems with over-water baselines. Approximately year-long time series are used. The radar data are the typical hourly radial measurements provided by CODAR systems. These measurements are actually the median (or mean) of anywhere between 2 and 7 sub-hourly measurements collected by the radar system. The error indicator under examination is based on the standard deviation (std) of the sub-hourly radials, divided by the square root of the number of sub-hourly radials. These values are recorded in the hourly data files produced by recent versions of the CODAR data processing software. Examination of the model demonstrates a positive correlation between the model and the measured baseline difference std for all baseline pairs examined. The predictive capability of the error model is demonstrated by presenting its use as a data discriminator and by examination of time series of sliding boxcar samples of radar data. Baseline difference std for data rejected by a threshold based on the error model is shown to be significantly higher than for the data retained. The results presented here demonstrate potential to improve assessment of the HF radar current measurement uncertainty. Such improvement has potential to benefit all applications of HF radar data, including for example, Lagrangian particle tracking and surface current assimilation into numerical models.","PeriodicalId":345178,"journal":{"name":"2011 IEEE/OES 10th Current, Waves and Turbulence Measurements (CWTM)","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123676120","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 7

Spar buoy platform for water wave, turbulence and underwater electric field sensors 用于水波、湍流和水下电场传感器的浮筒平台

2011 IEEE/OES 10th Current, Waves and Turbulence Measurements (CWTM) Pub Date : 2011-03-20 DOI: 10.1109/CWTM.2011.5759551

C. Bradley, W. Venezia

引用次数: 1

Surface-current variability statistics in the tidally dominated San Francisco Bay 潮汐占主导地位的旧金山湾的表面流变率统计

2011 IEEE/OES 10th Current, Waves and Turbulence Measurements (CWTM) Pub Date : 2011-03-20 DOI: 10.1109/CWTM.2011.5759541

M. Hubbard, N. Garfield, D. Barrick

引用次数: 1

Turbulent dissipation estimates from pulse coherent doppler instruments 用脉冲相干多普勒仪器估计湍流耗散

2011 IEEE/OES 10th Current, Waves and Turbulence Measurements (CWTM) Pub Date : 2011-03-20 DOI: 10.1109/CWTM.2011.5759546

P. Rusello, E. Cowen

引用次数: 17