Metadata Report for BODC Series Reference Number 1039465
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
Data Description |
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Data Identifiers |
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Time Co-ordinates(UT) |
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Spatial Co-ordinates | |||||||||||||||||||||||||
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Parameters |
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Problem Reports
No Problem Report Found in the Database
Data Access Policy
Public domain data
These data have no specific confidentiality restrictions for users. However, users must acknowledge data sources as it is not ethical to publish data without proper attribution. Any publication or other output resulting from usage of the data should include an acknowledgment.
The recommended acknowledgment is
"This study uses data from the data source/organisation/programme, provided by the British Oceanographic Data Centre and funded by the funding body."
Narrative Documents
RBR Ltd Depth Recorder Model DR-1050
Single channel data logger.
Manufacturer's specifications:
Case size: 230 mm x 38 mm
Material: Delrin (acetal copolymer); titanium (for up to 10,500 m)
Depth ratings: Delrin housing 10/20/50/100/200/500/740 m (dBar); titanium 1000/2000/4000/6000/10,000 m (dBar)
Accuracy: ±0.05% full scale
Resolution: <0.001% full scale
Time Constant: < 10 msec
The DR-1050 uses an internal Keller piezo-resistive strain gauge sensor (an absolute pressure sensor). Atmospheric pressure must be subtracted from the absolute pressure to obtain water depth. The standard depth sensors are calibrated at RBR to better than ±0.05% full scale. Using reliable semiconductor technology and a 316 stainless steel housing, the depth sensors are developed for long-term stability in harsh environments. This is also reflected in their operating temperature range of -40°C to 125°C. Typical depth hysteresis of the depth sensor is ±0.015%FS, and it has a response time of 0.1 msec.
Data are uploaded from the logger and processed using the RBR Windows Data Logger Software.
Further details can be found in the manufacturer's specification sheet.
BODC Processing
Data were received in ASCII format files. The series were reformatted to QXF (a netCDF format) using the BODC transfer function 325. The following table shows how the variables within the file were mapped to the appropriate BODC parameter codes.
Original parameter name | Original Units | BODC Parameter Code | BODC Units | Comments |
---|---|---|---|---|
Time | DD/MM/YYYY HH:MI (GMT) | AADYAA01, AAFDZZ01 | day number, day fraction | Conversion by transfer |
Depth | meters | PPSBPS01 | meters |
Following transfer to QXF, the data were screened using BODC's in-house visualisation software, EDSERPLO. Any data considered as suspect were flagged accordingly. Flags from the originator marking suspect data were retained during transfer.
Originator's Data Processing
Marine Scotland applied the standard manufacturers' calibrations to all water level recorder (WLR)/Minilogger data and produced ASCII files for submission to BODC. Data files (.hmo) were named according to the mooring code and the instrument number. Files contained water level data in meters (WLR) or decibars (Minilogger). Minilogger files also contained temperature data. Header metadata were collated in additional files (.frm).
Project Information
No Project Information held for the Series
Data Activity or Cruise Information
Data Activity
Start Date (yyyy-mm-dd) | 2009-07-20 |
End Date (yyyy-mm-dd) | 2009-08-04 |
Organization Undertaking Activity | Marine Scotland Aberdeen Marine Laboratory |
Country of Organization | United Kingdom |
Originator's Data Activity Identifier | 774w |
Platform Category | fixed benthic node |
FRS Water Level Recorder (774w) from Pentland Firth
A bottom mounted RBR Water Level Recorder (DR-1050) was deployed by Marine Scotland, Aberdeen Marine Laboratory in the Pentland Firth (58° 39.71'N 03° 20.08'W). The instrument was deployed on 20/07/2009 and recovered on 21/07/2009, during the FRV Scotia cruise 1009S. The station had a nominal water depth of 46m.
The mooring consisted of the following instruments
Instrument type | Series Number | Serial Number | Deployment start | Deployment end | Instrument depth (m) | No. Readings/Hour | Comments |
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RBR WLR DR-1050 | 774w | 13556 | 20/07/2009 | 04/08/2009 | 46 | 60 | - |
Cruise
Cruise Name | 1009S |
Departure Date | 2009-07-19 |
Arrival Date | 2009-08-05 |
Principal Scientist(s) | Peter Hayes (Marine Scotland Aberdeen Marine Laboratory) |
Ship | FRV Scotia |
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 |