The IEEE Seventh Working Conference on Current Measurement TechnologyCurrent and Wave Monitoring and Emerging TechnologiesMarch 13-15 | Bahia Hotel | San Diego, CA, USA |
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Comparison of five current meters in a tidally dominated flowA. J. PlueddemannStatus: Accepted
Co-Authors: Velocity measurements from five current meters of four different types
were compared: Two single-bin acoustic backscatter sensors from Nortek
and Sontek, one profiling acoustic backscatter sensor from RD Instruments
(RDI) one acoustic phase-shift sensor from Falmouth Scientific Inc. (FSI),
and a Vector Measuring Current Meter (VMCM) two-axis propeller sensor.
The instruments were deployed in Buzzards Bay, Massachusetts between 8
Feb and 16 May 2000. The water depth was about 12 m. The longest record
available was 96 days and the shortest was 9.5 days. Tidal decomposition
of the 96 day record showed that the flow was dominated by the semi-diurnal
tide. The comparisons were done using hourly average data during the 9.5
day interval when all five instruments were operating. The Sontek and
RDI had comparable noise levels, while the Nortek noise level was about
25% higher. As a group the acoustic backscatter instruments had higher
noise levels than either the FSI or the VMCM. All five Submitted on October 07, 2002 |
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