Development and test of a real-time wave measurement system with an Acoustic Waves and Current Profiler

Heitsenrether, Robert; Davis, E. S.; Sprenke, James; Teng, Chung-Chu

doi:10.1109/oceans.2012.6405085

“…A network of buoy-mounted sensors can also be used to monitor tsunamis in real-time to obtain the wave height, wavelength and wave propagation speed of a tsunami [219,220]. However, due to the deployment and maintenance cost, there is a limited number of buoyed sensors, which cover only a small part of the vast ocean surface.…”

Section: Tsunami Detectionmentioning

confidence: 99%

Spaceborne GNSS Reflectometry

Yu

¹

,

Han

²

,

Bu

³

et al. 2022

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This article presents a review on spaceborne Global Navigation Satellite System Reflectometry (GNSS-R), which is an important part of GNSS-R technology and has attracted great attention from academia, industry and government agencies in recent years. Compared with ground-based and airborne GNSS-R approaches, spaceborne GNSS-R has a number of advantages, including wide coverage and the ability to sense medium- and large-scale phenomena such as ocean eddies, hurricanes and tsunamis. Since 2014, about seven satellite missions have been successfully conducted and a large number of spaceborne data were recorded. Accordingly, the data have been widely used to carry out a variety of studies for a range of useful applications, and significant research outcomes have been generated. This article provides an overview of these studies with a focus on the basic methods and techniques in the retrieval of a number of geophysical parameters and the detection of several objects. The challenges and future prospects of spaceborne GNSS-R are also addressed.

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“…The first three sensors are relatively new to CO-OPS and considered test systems, while the fourth (TRDI 600 kHz Workhorse) is commonly used throughout CO-OPS' National Current Observation Program (NCOP) and it is considered a reference in this case [2,3,4]. The primary objective of this test was to assess the suitability for use of new ADCP's in PORTS and NCOP current measurement systems.…”

Section: Introductionmentioning

confidence: 99%

NOAA’s recent field testing of current and wave measurement systems – part ii

Wilson¹,

Heitsenrether²,

Gray³

et al. 2015

2015 IEEE/OES Eleveth Current, Waves and Turbulence Measurement (CWTM)

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The National Oceanic and Atmospheric Administration's (NOAA) Center for Operational Oceanographic Products and Services (CO-OPS) currently maintains twenty-two operational Physical Oceanographic Real-Time System (PORTS®) observatories throughout the United States' coastal regions. Ocean current observations are among the multiple PORTS® data products that provide critical support for safe navigation and a variety of scientific and engineering applications. To ensure that its observing network provides the most accurate and up-to-date products available, CO-OPS routinely conducts test and evaluation of newly available oceanographic sensors and measurement systems. From October 10 -December 3, 2014, CO-OPS conducted a field test in the South Chesapeake Bay which included three acoustic current profiling and wave sensors deployed in bottom mounted, upward looking configuration 1) the TRDI 500 kHz Sentinel V, 2) the Nortek 600 kHz AWAC-AST, and 3) the Nortek 500 kHz Signature 500 AD2CP; and an AXYS Technologies TriAXYS TM Next Wave II Directional Wave Buoy with Currents provided with an integrated Nortek 600 kHz Aquadopp acoustic sensor. Also included in the deployment was a bottom mounted TRDI 600 kHz Workhorse Sentinel acoustic current profiling sensor. The test site was near the mouth of the bay where currents are predominantly tidal and the average water depth is approximately 15 meters (50 feet). During the test, currents at the site ranged in magnitude from approximately 0-0.75 m/s on a daily basis and reached as high as 1.2 m/s (2.3 knots) on one occasion. Three high-wind storm events passed through the region and significant wave heights exceeded 2 m on multiple occasions. 978-1-4799-8419-0/15/$31.00 ©2015 IEEE

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“…In order to prepare for the establishment of new systems in nears shore regions where wave information is strongly desired but currently not available, CO-OPS has started to develop and test real-time currents and wave measurement systems featuring commonly available commercial-off-the-shelf acoustic sensors. To date, current and wave systems most recently developed and tested by CO-OPS have been based on bottom mounted, upward looking ADCP sensors [3,4]. One particular advantage of this system type is the capability to measure both parameters, simultaneously, using just one sensor mounted in a stable platform design.…”

Section: Introductionmentioning

confidence: 99%

NOAA’s recent field testing of current and wave measurement systems – part i

Heitsenrether

¹

,

Holcomb

²

,

Gray

³

et al. 2015

2015 IEEE/OES Eleveth Current, Waves and Turbulence Measurement (CWTM)

View full text Add to dashboard Cite

The National Oceanic and Atmospheric Administration's (NOAA) Center for Operational Oceanographic Products and Services (CO-OPS) currently maintains twenty-two operational Physical Oceanographic RealTime System (PORTS®) observatories throughout the United States' coastal regions. Ocean current observations are among the multiple PORTS® data products that provide critical support for safe navigation and a variety of scientific and engineering applications. To ensure that its observing network provides the most accurate and up-to-date products available, CO-OPS routinely conducts test and evaluation of newly available oceanographic sensors and measurement systems. From October 10 -December 3, 2014, CO-OPS conducted a field test in the South Chesapeake Bay which included three acoustic current profiling and wave sensors deployed in bottom mounted, upward looking configuration 1) the TRDI 500 kHz Sentinel V, 2) the Nortek 600 kHz AWAC-AST, and 3) the Nortek 500 kHz Signature 500 AD2CP; and an AXYS Technologies TriAXYS TM directional wave buoy with current measurement capability provided by an integrated Nortek 600 kHz Aquadopp acoustic sensor. Also included in the deployment was a bottom mounted TRDI 600 kHz Workhorse Sentinel acoustic current profiling sensor. The test site was near the mouth of the bay where currents are predominantly tidal and the average water depth is approximately 15 meters (50 feet). During the test, currents at the site ranged in magnitude from approximately 0-0.75 m/s on a daily basis and reached as high as 1.2 m/s (2.3 knots) on one occasion. Also, three high wind storm events passed through the region and significant wave heights exceeded 2 m on multiple occasions. Data results presented in this paper focus on comparison of currents measured by two of the bottom mounted sensors, the TRDI Workhorse and Nortek AWAC, and the TriAXYS TM wave buoy's Nortek Aquadopp sensor. Currents measured by the bottom mounted AWAC and Workhorse sensors showed excellent agreement throughout the entire test; differences in principle current axis headings remained less than 5 degrees and root mean squared deviations (RMSD) between the measured current magnitudes were within 4-5 cm/s over all profile depths. Comparisons of currents measured by these two bottom mounted sensors and the TriAXYS TM buoy's Aquadopp sensor showed good agreement in current direction but comparisons between current magnitudes varied throughout the test. During the first 20 days, currents measured by bottom mounted sensors did not exceed 1 m/s and comparison between bottom versus buoy mounted sensors' magnitudes were excellent; RMSDs remained within 5-6 cm/s. However, over the final 34 days of the test when currents measured by bottom mounted sensors often exceeded 1 m/s, the bottom versus buoy mounted sensors' current magnitudeRMSDs were approximately twice as large, in the 11-14 cm/s range. Preliminary results provide no clear indication of significant effect of wave conditions on bottom versus buoy mounted ADCP comparisons. Rather the...

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Development and test of a real-time wave measurement system with an Acoustic Waves and Current Profiler

Cited by 7 publications

References 2 publications

Spaceborne GNSS Reflectometry

Spaceborne GNSS Reflectometry

NOAA’s recent field testing of current and wave measurement systems – part ii

NOAA’s recent field testing of current and wave measurement systems – part i

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