Metadata Report for BODC Series Reference Number 1039489

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

Offshore sea floor pressure series

Instrument Type

Name	Categories
Vemco Minilog8 temperature recorder	water temperature sensor

Instrument Mounting

fixed benthic node

Originating Country

United Kingdom

Originator

Ms Sarah Hughes

Originating Organization

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	776/W
BODC Series Reference	1039489

Time Co-ordinates(UT)

Start Time (yyyy-mm-dd hh:mm)	2009-07-21 20:00
End Time (yyyy-mm-dd hh:mm)	2009-08-04 10:30
Nominal Cycle Interval	180.0 seconds

Spatial Co-ordinates

Latitude	58.65133 N ( 58° 39.1' N )
Longitude	3.30117 W ( 3° 18.1' W )
Positional Uncertainty	0.05 to 0.1 n.miles
Minimum Sensor or Sampling Depth	29.0 m
Maximum Sensor or Sampling Depth	29.0 m
Minimum Sensor or Sampling Height	0.0 m
Maximum Sensor or Sampling Height	0.0 m
Sea Floor Depth	29.0 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	Instantaneous - Depth measured below water line or instantaneous water body surface
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)
PREXPS01	1	Decibars	Pressure (measured variable) exerted by the water body by fixed in-situ pressure sensor and corrected to read zero at sea level
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 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

Data were received in ASCII format files. Pressure offsets were applied to the data where indicated as necessary by the originator. The series were transferred to BODC's in-house format. 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
Pressure	decibars	PREXPS01	decibars
Depth	m	DEPHFP01	m	Not derived for all moorings
Temperature	°C	TEMPPR01	°C	Not measured at all moorings

Following reformatting, the data were visually screened. Any data considered suspect were flagged accordingly. Flags from the originator's quality control 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)	2009-07-21
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	776w
Platform Category	fixed benthic node

FRS Minilogger (776w) from Pentland Firth

A bottom mounted, pressure recording VEMCO Minilogger was deployed by Marine Scotland, Aberdeen Marine Laboratory in the Pentland Firth (58° 39.08'N 03° 18.07'W). The instrument was deployed on 21/07/2009 and recovered on 04/08/2009, during the FRV Scotia cruise 1009S. The station had a nominal water depth of 29m.

The mooring consisted of the following instruments

Instrument type	Series Number	Serial Number	Deployment start	Deployment end	Instrument depth (m)	No. Readings/Hour	Comments
VEMCO Minilogger	776w	2827	21/07/2009	04/08/2009	29	20	-

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