Metadata Report for BODC Series Reference Number 580821

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 Category

Hydrography time series at depth

Instrument Type

Name	Categories
Vemco Minilog8 temperature recorder	water temperature sensor

Instrument Mounting

subsurface mooring

Originating Country

United Kingdom

Originator

Dr Bill Turrell

Originating Organization

Fisheries Research Services Aberdeen Marine Laboratory (now Marine Scotland Aberdeen Marine Laboratory)

Processing Status

banked

Online delivery of data

Download available - Ocean Data View (ODV) format

Project(s)

Data Identifiers

Originator's Identifier	666/T8
BODC Series Reference	580821

Time Co-ordinates(UT)

Start Time (yyyy-mm-dd hh:mm)	2001-05-22 16:08
End Time (yyyy-mm-dd hh:mm)	2001-10-04 00:32
Nominal Cycle Interval	1440.0 seconds

Spatial Co-ordinates

Latitude	56.99780 N ( 56° 59.9' N )
Longitude	1.74780 W ( 1° 44.9' W )
Positional Uncertainty	0.05 to 0.1 n.miles
Minimum Sensor or Sampling Depth	35.0 m
Maximum Sensor or Sampling Depth	35.0 m
Minimum Sensor or Sampling Height	40.0 m
Maximum Sensor or Sampling Height	40.0 m
Sea Floor Depth	75.0 m
Sea Floor Depth Source	-
Sensor or Sampling Distribution	Fixed common depth - All sensors are grouped effectively at the same depth which is effectively fixed for the duration of the series
Sensor or Sampling Depth Datum	Sea floor reference - Depth measured as a height above sea floor but converted into a depth relative to the sea surface according to the same datum as used for sea floor depth (applicable to instrument depths not bathymetric depths)
Sea Floor Depth Datum	Instantaneous - Depth measured below water line or instantaneous water body surface

Parameters

BODC CODE	Rank	Units	Title
AADYAA01	1	Days	Date (time from 00:00 01/01/1760 to 00:00 UT on day)
AAFDZZ01	1	Days	Time (time between 00:00 UT and timestamp)
TEMPPR01	1	Degrees Celsius	Temperature of the water body

Definition of Rank
Rank 1 is a one-dimensional parameter Rank 2 is a two-dimensional parameter Rank 0 is a one-dimensional parameter describing the second dimension of a two-dimensional parameter (e.g. bin depths for moored ADCP data)

Problem Reports

No Problem Report Found in the Database

Data quality

The temperature channel is noisy throught the dataset and there is a sharp increase in values from start to finish.

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

Vemco Minilog8 TR temperature logger

The VEMCO Minilog8-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	16 or 64k memory size, approximately 8000 readings stored in non-volatile Electrically Erasable Programmable Read Only Memory (EEPROM). Logging duration is between 1 second to 6 hours for up to 5 years depending on the logging interval.
Data Retention	20 years.
Temperature Range	-5 to 40 °C; 0.1-0.2 °C resolution; ±0.2-0.3 °C accuracy with factory calibration.
Maximum Depth	680 m
Communication Link	Infrared LED. No external connections are required. Full memory downloads in 3 to 6 minutes.
Battery	Internal lithium battery with life of up to 5 years or up to 700- 1000 full deployments.

Further details can be found in the manufacturer's specification sheet.

BODC processing

The data were provided to BODC in ascii format and were transferred to qxf format by BODC produced Matlab transfer 136. The full data file contained only temperature data. This was mapped to the appropriate BODC parameter code.

Variable	Units	BODC parameter code	Units	Comments
Temperature	deg C	TEMPPR01	deg C	-

Following the transfer the data was screened using the BODC in-house visualisation software, EDSERPLO. Any suspect data points were flagged with the appropriate BODC flag code.

Originator's data processing

The data from the Vemco Miniloggers were merged to form "pseudo" thermistor chain records prior to being supplied to BODC.

FRS applied the standard manufaturers' calibrations to all data, and produced ascii files for submission to BODC.

Project Information

No Project Information held for the Series

Data Activity or Cruise Information

Data Activity

Start Date (yyyy-mm-dd)	2001-05-22
End Date (yyyy-mm-dd)	2001-10-10
Organization Undertaking Activity	Fisheries Research Services Aberdeen Marine Laboratory (now Marine Scotland Aberdeen Marine Laboratory)
Country of Organization	United Kingdom
Originator's Data Activity Identifier	666
Platform Category	subsurface mooring

FRS moored Vemco Minilogger from Stonehaven

A moored Vemco minilogger was deployed by Fisheries Research Services (FRS) in Sonehaven (56.99783° N, 1.74783° W) on 22/05/01 as part of the Clupea 0701c cruise, and recovered on 10/10/01 by the Clupea 1401c cruise. The station had a nominal water depth of 75 m. The SonTek Argonaut had a sampling period of 12 minutes. The data were supplied as current meter records at depths of: Series 6661 at 1m, Series 6662 at 5 m, Series 6663 at 10 m, Series 6664 at 15 m, Series 6665 at 20 m, Series 6666 at 30 m, Series 6667 at 35 m, Series 6668 at 50 m.

The mooring consisted of the following instruments.

Instrument type	Series Number	Serial Number	Deployment start	Deployment end	Instrument depth (m)	Comments
Vemco Minilogger	6661	4151	22/05/2001	10/10/2001	1	Minilogger lost. No data received.
Vemco Minilogger	6662	4152	22/05/2001	10/10/2001	5	Data have minimal editing.
Vemco Minilogger	6663	4140	22/05/2001	10/10/2001	10	Data have minimal editing. Data interval set at 4 mins and 1 sec in error.
Vemco Minilogger	6664	4153	22/05/2001	10/10/2001	15	Data have minimal editing.
Vemco Minilogger	6665	4141	22/05/2001	10/10/2001	20	Minilogger lost. No data received.
Vemco Minilogger	6666	1917	22/05/2001	10/10/2001	30	Data have minimal editing.
Vemco Minilogger	6667	4142	22/05/2001	10/10/2001	35	Data have minimal editing.
Vemco Minilogger	6668	1916	22/05/2001	10/10/2001	50	Data have minimal editing.

Related Data Activity activities are detailed in Appendix 1

Cruise

Cruise Name	0701C
Departure Date	2001-05-22
Arrival Date	2001-06-11
Principal Scientist(s)	Simon Greenstreet (Fisheries Research Services Aberdeen Marine Laboratory)
Ship	FRV Clupea

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