Metadata Report for BODC Series Reference Number 1170346
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 |
|||||||||||||||||||||||||
|
|||||||||||||||||||||||||
Data Identifiers |
|||||||||||||||||||||||||
|
|||||||||||||||||||||||||
Time Co-ordinates(UT) |
|||||||||||||||||||||||||
|
|||||||||||||||||||||||||
Spatial Co-ordinates | |||||||||||||||||||||||||
|
|||||||||||||||||||||||||
Parameters |
|||||||||||||||||||||||||
|
|||||||||||||||||||||||||
|
Problem Reports
No Problem Report Found in the Database
Data Access Policy
Open 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.
If the Information Provider does not provide a specific attribution statement, or if you are using Information from several Information Providers and multiple attributions are not practical in your product or application, you may consider using the following:
"Contains public sector information licensed under the Open Government Licence v1.0."
Narrative Documents
VEMCO Minilog12-TR temperature logger
Description
The VEMCO Minilog12-TR is a miniature data logger that records temperature at a user programmed time interval. It is housed in a waterproof cylinder and the temperature sensor is mounted on a protruding stainless steel probe.
Specifications
Memory | 16k, 32k or 64k. Temperature readings stored in Electrically Erasable Programmable Read Only Memory (EEPROM). Logging duration is between 3 hours and 5 years depending on the logging interval. |
---|---|
Data Retention | 20 years. |
Temperature Range | -5 to 40°C; 0.015°C resolution; ±0.1°C accuracy with factory calibration. |
Maximum Depth | 1000m |
Communication Link | Downloaded via PC interface box. Connects to computer via DB9 connector. No external connections are required. Full memory downloads in 6 minutes for 16k. |
Battery | Internal lithium battery with life of up to 5 years or up to 1200 full deployments. |
For more information please see the Manufacturer's information sheet.
PO328 Moored Minilogger sensors originators processing document
Data processing
The thermistor inside the Vemco minilogger initially produced an analogue value representing how its electrical resistance changes with temperature. This value was converted into a digital value using an analogue-to-digital (AtoD) converter inside the logger. When the data were downloaded an internally stored calibration was applied to the value to give the temperature in °C and the raw digital output as AtoD. Next, the data were converted from binary to ASCII format by the data originator. Data files supplied to BODC included both the digital temperature value as well as the raw digital output. The originator also supplied suggested correction factors for data from some of the loggers (summarised below). These were calculated by the originator to maintain a decreasing temperature-depth profile. The corrections have not been applied to the data.
Corrections supplied with the data
Serial number | Nominal height above seabed (m) | Correction (°C) | |
---|---|---|---|
East mooring | 2106 | 49 | 0.08 |
5230 | 41 | -0.06 | |
8961 | 17 | 0.9 | |
8947 | 5 | 0.6 | |
South mooring | 2406 | 48 | -0.06 |
2427 | 40 | -0.18 | |
2192 | 32 | -0.05 | |
2196 | 20 | -0.1 | |
2425 | 16 | -0.05 | |
2110 | 12 | 0.05 | |
2185 | 8 | -0.05 | |
West mooring | 2421 | 50 | 0.85 |
2195 | 30 | -0.12 | |
2197 | 6 | -0.35 |
PO328 Moored VEMCO Minilogger Sensor Processing undertaken by BODC
Data were received by BODC in ASCII files for each sensor deployed. The series were reformatted to internal BODC format using established procedures. The following table details mapping of variables to BODC parameter codes.
Parameters to be processed further
Originator' Variable | Units | BODC Parameter Code | Definition of Parameter Code | Units |
---|---|---|---|---|
Celsius | °C | TEMPPR01 | Temperature of the water column | °C |
Parameters not to be processed further
Originator's variable | Description |
---|---|
Temp(AtoD) | Raw digital output of sensor |
The raw digital output of the sensor supplied by the originator has been archived and is available on request if required.
BODC Quality Control
The reformatted data were visualised using BODC in-house software. Suspect data were marked by adding an appropriate quality control flag, and missing data marked by both setting the data to an appropriate absent data value and setting the quality control flag.
Project Information
No Project Information held for the Series
Data Activity or Cruise Information
Data Activity
Start Date (yyyy-mm-dd) | 2005-09-08 |
End Date (yyyy-mm-dd) | 2005-09-21 |
Organization Undertaking Activity | Proudman Oceanographic Laboratory (now National Oceanography Centre, Liverpool) |
Country of Organization | United Kingdom |
Originator's Data Activity Identifier | PO328_East |
Platform Category | subsurface mooring |
PO328 East temperature logger mooring
Deployment and recovery
The temperature logger array was deployed and recovered from FS Poseidon cruise PO328.
Deployment | Recovery | |
---|---|---|
Time (UTC) | 2005/09/08 08:00 - 08:27 on | 2005/09/21 07:01 |
Nominal water depth | 597 m | 599 m |
Position | 60° 14.41'N 04° 37.46'W | 60° 14.58'N 04° 37.05'W |
The mooring was deployed from the afterdeck using the A-frame. The sub-surface buoyancy is deployed first followed by the mooring wire, instruments being attached at pre-marked intervals on the wire. The MORS release is attached to the bottom end of the wire followed by the anchor clump which is cut free when the ship is on station. The ascent rate of the mooring was estimated as 100 m min-1.
Recovery was over the port side with the strayline attached to the sub-surface buoy being grappled first and the buoy winched onboard. This was then unshackled and the mooring wire attached to the winch. As the wire was wound in the Minilogs were removed one by one until finally the Oceano release was brought onboard.
Mooring setup
The moorings consisted of a 50 m mooring wire attached to a 500 kg anchor clump via an Oceano transponding release. Buoyancy was provided by a syntactic barrel buoy. Each had a 15 m stray line and pickup float to aid recovery. Vemco Minilog temperature recorders were attached using cable ties and PVC tape at 4 m intervals along the mooring wire. In addition a Seabird MicroCAT (temperature, conductivity and pressure) recorder was deployed at the deepest point; nominally 4 m above the bed. The Minilog sampling interval, either two minutes or four minutes, was determined by the memory capacity of the individual loggers.
Rig description
Instrument | Serial number | Nominal height above the bed (m) | Logging interval (minutes) | Time (UTC) of last data ensemble | Calibration date | Owner |
---|---|---|---|---|---|---|
Vemco Minilog | 2187 | 53 | 4 | 2005/09/22 17:12 UTC (logger turned off at 17:14:19) | 2004/08 | POL |
Vemco Minilog | 2106 | 49 | 2 | 2005/09/22 17:38 (logger turned off at 17:39:39) | 2005/06 | POL |
Vemco Minilog | 7333 | 45 | 2 | 2005/09/22 18:02 (logger turned off at 18:03:29) | 2005/12 | POL |
Vemco Minilog | 5230 | 41 | 4 | 2005/09/22 17:02 (logger turned off at 17:33:39) | 2005/12 | POL |
Vemco Minilog | 2108 | 37 | 2 | 2005/09/22 18:30 (logger turned off at 18:31:39) | 2005/06 | POL |
Vemco Minilog | 2112 | 33 | 2 | 2005/09/22 18:12 (logger turned off at 18:13:39) | 2005/06 | POL |
Vemco Minilog | 2193 | 29 | 4 | 19:20 on 22/09/2005 (logger turned off at 19:23:39) | 08/2004 | POL |
Vemco Minilog | 2424 | 25 | 2 | 2005/09/22 17:28 (logger turned off at 17:29:39) | 2001/07 | POL |
Vemco Minilog | 4484 | 21 | 2 | No data* | 2005/06 | POL |
Vemco Minilog | 8961 | 17 | 4 | 2005/09/22 17:52 (logger turned off at 17:55:39) | 2005/12 | POL |
Vemco Minilog | 2113 | 13 | 2 | 2005/09/22 15:32 (logger turned off at 15:33:39) | 2005/06 | POL |
Vemco Minilog | 4483 | 9 | 2 | 2005/09/22 19:02 (logger turned off at 19:02:59) | 2005/06 | POL |
Vemco Minilog | 8947 | 5 | 4 | 2005/09/22 17:20 (logger turned off at 17:21:39) | 2005/12 | POL |
Seabird MicroCAT | 3273 | 4 | 1 | 2005/09/21 16:14 | UKORS | |
Oceano release type RT661 | 183 |
*The originator was unable to download the data from this logger.
POL - Proudman Oceanographic Laboratory, Liverpool
UKORS - UK Ocean Research Services
Related Data Activity activities are detailed in Appendix 1
Cruise
Cruise Name | PO328 |
Departure Date | 2005-09-06 |
Arrival Date | 2005-09-25 |
Principal Scientist(s) | John Huthnance (Proudman Oceanographic Laboratory) |
Ship | FS Poseidon |
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: PO328_East
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 |
---|---|---|---|---|
1170278 | Hydrography time series at depth | 2005-09-07 06:00:00 | 60.2402 N, 4.6243 W | FS Poseidon PO328 |
1170291 | Hydrography time series at depth | 2005-09-07 06:00:00 | 60.2402 N, 4.6243 W | FS Poseidon PO328 |
1170309 | Hydrography time series at depth | 2005-09-07 06:00:00 | 60.2402 N, 4.6243 W | FS Poseidon PO328 |
1170310 | Hydrography time series at depth | 2005-09-07 06:00:00 | 60.2402 N, 4.6243 W | FS Poseidon PO328 |
1170322 | Hydrography time series at depth | 2005-09-07 06:00:00 | 60.2402 N, 4.6243 W | FS Poseidon PO328 |
1170334 | Hydrography time series at depth | 2005-09-07 06:00:00 | 60.2402 N, 4.6243 W | FS Poseidon PO328 |
1170358 | Hydrography time series at depth | 2005-09-07 06:00:00 | 60.2402 N, 4.6243 W | FS Poseidon PO328 |
1170371 | Hydrography time series at depth | 2005-09-07 06:00:00 | 60.2402 N, 4.6243 W | FS Poseidon PO328 |
1170383 | Hydrography time series at depth | 2005-09-07 06:00:00 | 60.2402 N, 4.6243 W | FS Poseidon PO328 |
1170395 | Hydrography time series at depth | 2005-09-07 06:00:00 | 60.2402 N, 4.6243 W | FS Poseidon PO328 |
1170402 | Hydrography time series at depth | 2005-09-07 06:00:00 | 60.2402 N, 4.6243 W | FS Poseidon PO328 |
1170696 | Hydrography time series at depth | 2005-09-08 12:00:03 | 60.2402 N, 4.6243 W | FS Poseidon PO328 |