Metadata Report for BODC Series Reference Number 1043753


Metadata Summary

Data Description

Data Category Offshore sea floor pressure series
Instrument Type
NameCategories
RBR DR-1050 depth recorder  sea level recorders
Instrument Mounting fixed benthic node
Originating Country United Kingdom
Originator Ms Sarah Hughes
Originating Organization Marine Scotland Aberdeen Marine Laboratory
Processing Status banked
Project(s) -
 

Data Identifiers

Originator's Identifier 792/W
BODC Series Reference 1043753
 

Time Co-ordinates(UT)

Start Time (yyyy-mm-dd hh:mm) 2010-08-06 14:31
End Time (yyyy-mm-dd hh:mm) 2010-08-09 09:46
Nominal Cycle Interval 60.0 seconds
 

Spatial Co-ordinates

Latitude 59.50800 N ( 59° 30.5' N )
Longitude 1.62017 W ( 1° 37.2' W )
Positional Uncertainty 0.05 to 0.1 n.miles
Minimum Sensor Depth 52.0 m
Maximum Sensor Depth 52.0 m
Minimum Sensor Height 0.0 m
Maximum Sensor Height 0.0 m
Sea Floor Depth 52.0 m
Sensor Distribution Fixed common depth - All sensors are grouped effectively at the same depth which is effectively fixed for the duration of the series
Sensor 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 Short Title Title
AADYAA01 1 Days Date(Loch_Day) Date (time from 00:00 01/01/1760 to 00:00 UT on day)
AAFDZZ01 1 Days Time(Day_Fract) Time (time between 00:00 UT and timestamp)
PREXPS01 1 Decibars MeasPress_SL Pressure (measured variable) exerted by the water body by fixed in-situ pressure sensor and corrected to read zero at sea level
 

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

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
Pressure decibars PREXPR01 decibars  

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) 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 decibars or meters. 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) 2010-08-06
End Date (yyyy-mm-dd) 2010-08-09
Organization Undertaking ActivityMarine Scotland Aberdeen Marine Laboratory
Country of OrganizationUnited Kingdom
Originator's Data Activity Identifier792w
Platform Categoryfixed benthic node

FRS Water Level Recorder (792w) from Fair Isle

A bottom mounted RBR Water Level Recorder (DR-1050) was deployed by Marine Scotland, Aberdeen Marine Laboratory in the waters near Fair Isle (59° 30.48'N 01° 37.21'W). The instrument was deployed on 06/08/2010 and recovered on 09/08/2010, during the FRV Scotia cruise 0910S. The station had a nominal water depth of 52m.

The mooring consisted of the following instruments:

Instrument type Series Number Serial Number Deployment start Deployment end Instrument depth (m) No. Readings/Hour Comments
RBR WLR DR-1050 792w 13557 06/08/2010 09/08/2010 52 60 -

Cruise

Cruise Name 0910S
Departure Date 2010-07-21
Arrival Date 2010-08-10
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