Metadata Report for BODC Series Reference Number 2047242
Metadata Summary
Problem Reports
Data Access Policy
Narrative Documents
Project Information
Data Activity or Cruise Information
Fixed Station Information
BODC Quality Flags
SeaDataNet Quality Flags
Metadata Summary
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Time Co-ordinates(UT) |
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Parameters |
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Problem Reports
No Problem Report Found in the Database
Data Access Policy
Open Data supplied by Natural Environment Research Council (NERC)
You must always use the following attribution statement to acknowledge the source of the information: "Contains data supplied by Natural Environment Research Council."
Narrative Documents
Teledyne RDI Workhorse Sentinel 600 kHz Acoustic Doppler Current Profiler (ADCP)
The Workhorse Sentinel is a self-contained ADCP that can be used either on a mooring or mounted in the hull of a moving vessel. Its 4-beam design provides a redundant data source (in case of a blocked or damaged beam), an independent data quality measure (error velocity) and reduces the variance in data, thereby improving data reliability, quality and accuracy.
Real-time data can be transmitted to shore via a cable link or acoustic modem or they can be stored internally. Sensors for bottom tracking, pressure and directional wave measurements can be added to the instrument and a special casing is available for deeper applications.
Specifications
Typical range | 50 m |
Number of depth cells | 1 to 128 |
Typical ping rate | 2 Hz |
Standard depth rating | 200 to 6000 m |
Beam angle | 20 ° |
Echo intensity profile | |
Dynamic range | 80 dB |
Precision | ± 1.5 dB |
Velocity | |
Accuracy | 0.3% of the water velocity relative to the ADCP ± 0.3 cm s-1 |
Resolution | 0.1 cm s-1 |
Range | ± 5 m s-1 (default) ± 20 m s-1 (maximum) |
Vertical resolution | Range / Std Dev |
for 0.5 m | 39 m / 12.9 cm s-1 |
for 1 m | 43 m / 6.1 cm s-1 |
for 2 m | 47 m / 3.0 cm s-1 |
for 4 m | 52 m / 2.0 cm s-1 |
Long Range mode | |
Range | 70 m |
Depth cell size | 4 m |
Std Deviation | 4.2 cm s-1 |
Temperature | |
Operating temp. | -5 to 45 °C |
Precision | ± 0.4 °C |
Resolution | 0.01 °C |
Tilt | |
Range | ± 15 ° |
Accuracy | ± 0.5 ° |
Precision | ± 0.5 ° |
Resolution | 0.01 ° |
Compass | |
Accuracy | ± 2 ° |
Resolution | 0.01 ° |
Maximum tilt | ± 15 ° |
Precision | ± 0.5 ° |
Further details can be found in the manufacturer's specification sheet.
Wave Hub site ADCP mooring May 2012: Originator's processing
Sampling Strategy
The ADCP mooring was deployed from the 13/05/2012-22/05/2012 using the Plymouth University vessel, RV Falcon Spirit. Data were collected for Wave Hub Baseline Study project funded by NERC grant NE/I015108/1.
Data Processing
No post-processing was applied to the file. It was submitted to BODC as raw ASCII format from the instrument.
No quality control flags have been applied to the files.
Field Calibrations
No field calibrations were undertaken.
Wave Hub site ADCP mooring May 2012: Processing by BODC
Data from one moored ADCP mooring arrived at BODC in tab delimited text file. The mooring was active between 13/05/2012-22/05/2012 and was part of the Wave Hub Baseline Study project. This was converted into a matlab file for transfer into BODCs database. The following table shows how the variables within the files were mapped to appropriate BODC parameter codes:
Originator's Variable | Units | BODC Parameter Code | Units | Comment |
---|---|---|---|---|
vele | mm/s | LCEWAP01 | cm/s | Units were converted by dividing by 10. |
veln | mm/s | LCNSAP01 | cm/s | Units were converted by dividing by 10. |
velver | mm/s | LRZAAP01 | cm/s | Units were converted by dividing by 10. |
velerr | mm/s | LERRAP01 | cm/s | Units were converted by dividing by 10. |
mag | mm/s | - | - | Channel not transferred |
dir | Degrees True | - | - | Channel not transferred |
pg1 | Percent | - | - | Channel not transferred |
pg2 | Percent | - | - | Channel not transferred |
pg3 | Percent | - | - | Channel not transferred |
pg4 | Percent | - | - | Channel not transferred |
The reformatted data were visualised using BODC's in-house visualisation software. Suspect data were marked by adding an appropriate quality control flag, missing data by both setting the data to an appropriate absent data value and setting the quality control flag.
*The beam percentages were supplied by the originator but they are not included in the final BODC files. They are available on request in the original format, along with the Mag and Dir channels.
Project Information
NERC Discovery Science - Wave Hub baseline study
Background
This proposal has been designed to fill urgent scientific gaps in relation to baseline studies in renewable energy test sites and to take advantage of the unique opportunity presented by the development of the Wave Hub demonstrator site.
This project was funded by the NERC grant - NE/I015108/1 Wave Hub baseline study.
It is essential to obtain this information prior to deployment of infrastructure to understand the impact of arrays of wave devices together with the Wave Hub infrastructure. This opportunity has already been lost at other wave energy device testing sites (such as at European Marine Energy Centre (EMEC), Orkney), because devices, together with infrastructure such as moorings and cabling have already been installed.
This project is also driven by the need to expand the science capability and resources over the next five years to address the questions which have arisen directly in respect of marine renewable energy development and sustainable use of marine resources. Hence, many of the activities are also viewed as capacity building and skill development within Plymouth Marine Laboratory (PML) - Partnership for Research in Marine Renewable Energy (PRIMaRE) that are pivotal to address the scientific requirements of the renewable energy sector.
Scientific Objectives
To obtain:
- Detailed oceanographic study at the Wave Hub site and surrounds - covering the whole range of physical, chemical and biological parameters before the deployment of Wave Hub infrastructure and wave energy devices.
- Ensure data acquisition in time and space to allow development of physical and ecosystem models at scales relevant to wave arrays. Ultimately models will make predictive assessments of the extent, timescales and intensity of ecosystem impacts and perturbation resulting from implementation of wave energy arrays.
- Engagement of environmental economists to ensure these same data can be used to develop economic valuation estimates of critical life supporting ecosystem services at scales appropriate to arrays of wave devices for comparison with other uses of marine space.
- To address the questions which have arisen directly in respect of marine renewable energy development and sustainable use of marine resources.
Fieldwork
The data were acquired from the RV Falcon Spirit, the Plymouth University vessel. The small 14m catermaran was used on a daily basis from 13 May 2012 to 24 May 2012 with the idea to capture high quality, spatially resolved field data ahead of the Wave Hub construction.
Instrumentation
Types of instruments/measurements:
- CTDs
- Moored temperature loggers
- VMADCP
- Moored ADCPs
- Towed undulated CTD
Contacts
Collaborator | Organisation |
---|---|
Dr Phil Hosegood (lead) | University of Plymouth School of Marine Science and Engineering |
Dr Ricardo Torres | Plymouth Marine Laboratory, U.K |
Data Activity or Cruise Information
Data Activity
Start Date (yyyy-mm-dd) | 2012-05-13 |
End Date (yyyy-mm-dd) | 2012-05-22 |
Organization Undertaking Activity | University of Plymouth School of Marine Science and Engineering |
Country of Organization | United Kingdom |
Originator's Data Activity Identifier | mADCP_201205 |
Platform Category | subsurface mooring |
Wave Hub site ADCP mooring May 2012 for NERC grant NE/I015108/1
Deployment | RV Falcon Spirit (13/05/2012 10:45:00) |
---|---|
Recovery | RV Falcon Spirit (24/05/2012 13:42:00) |
Deployment Position | 50.34592°N, -5.59967°E |
Water Depth (m) | 55.5 |
The ADCP was in an MSI bed frame, and the mooring was kept upright by a large sub-surface float.
Instrument deployed on the mooring
614 kHz Broadband Upward facing ADCP
Height above bed (m) | Instrument serial number |
---|---|
0.7 | 1517 |
Related Data Activity activities are detailed in Appendix 1
Cruise
Cruise Name | 2012-05 |
Departure Date | 2012-05-13 |
Arrival Date | 2012-05-24 |
Principal Scientist(s) | Phil Hosegood (University of Plymouth School of Marine Science and Engineering) |
Ship | RV Falcon Spirit |
Complete Cruise Metadata Report is available here
Fixed Station Information
No Fixed Station Information held for the Series
BODC Quality Control Flags
The following single character qualifying flags may be associated with one or more individual parameters with a data cycle:
Flag | Description |
---|---|
Blank | Unqualified |
< | Below detection limit |
> | In excess of quoted value |
A | Taxonomic flag for affinis (aff.) |
B | Beginning of CTD Down/Up Cast |
C | Taxonomic flag for confer (cf.) |
D | Thermometric depth |
E | End of CTD Down/Up Cast |
G | Non-taxonomic biological characteristic uncertainty |
H | Extrapolated value |
I | Taxonomic flag for single species (sp.) |
K | Improbable value - unknown quality control source |
L | Improbable value - originator's quality control |
M | Improbable value - BODC quality control |
N | Null value |
O | Improbable value - user quality control |
P | Trace/calm |
Q | Indeterminate |
R | Replacement value |
S | Estimated value |
T | Interpolated value |
U | Uncalibrated |
W | Control value |
X | Excessive difference |
SeaDataNet Quality Control Flags
The following single character qualifying flags may be associated with one or more individual parameters with a data cycle:
Flag | Description |
---|---|
0 | no quality control |
1 | good value |
2 | probably good value |
3 | probably bad value |
4 | bad value |
5 | changed value |
6 | value below detection |
7 | value in excess |
8 | interpolated value |
9 | missing value |
A | value phenomenon uncertain |
B | nominal value |
Q | value below limit of quantification |
Appendix 1: mADCP_201205
Related series for this Data Activity are presented in the table below. Further information can be found by following the appropriate links.
If you are interested in these series, please be aware we offer a multiple file download service. Should your credentials be insufficient for automatic download, the service also offers a referral to our Enquiries Officer who may be able to negotiate access.
Series Identifier | Data Category | Start date/time | Start position | Cruise |
---|---|---|---|---|
2047150 | Currents -subsurface Eulerian | 2012-05-13 10:45:01 | 50.34592 N, 5.59967 W | RV Falcon Spirit 2012-05 |
2047162 | Currents -subsurface Eulerian | 2012-05-14 00:00:00 | 50.34592 N, 5.59967 W | RV Falcon Spirit 2012-05 |
2047174 | Currents -subsurface Eulerian | 2012-05-15 00:00:00 | 50.34592 N, 5.59967 W | RV Falcon Spirit 2012-05 |
2047186 | Currents -subsurface Eulerian | 2012-05-16 00:00:01 | 50.34592 N, 5.59967 W | RV Falcon Spirit 2012-05 |
2047198 | Currents -subsurface Eulerian | 2012-05-17 00:00:00 | 50.34592 N, 5.59967 W | RV Falcon Spirit 2012-05 |
2047205 | Currents -subsurface Eulerian | 2012-05-18 00:00:00 | 50.34592 N, 5.59967 W | RV Falcon Spirit 2012-05 |
2047217 | Currents -subsurface Eulerian | 2012-05-19 00:00:00 | 50.34592 N, 5.59967 W | RV Falcon Spirit 2012-05 |
2047229 | Currents -subsurface Eulerian | 2012-05-20 00:00:00 | 50.34592 N, 5.59967 W | RV Falcon Spirit 2012-05 |
2047230 | Currents -subsurface Eulerian | 2012-05-21 00:00:00 | 50.34592 N, 5.59967 W | RV Falcon Spirit 2012-05 |