Metadata Report for BODC Series Reference Number 1166925

• 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

Problem Reports

No Problem Report Found in the Database

Quality Control Report

Pressure and depth data appear to be in generally good order, but are subject to occasional, small discontinuities, consistent with vertical displacements of the mooring up to about 10 cm. Variability on either side of these discontinuities seems to be unaffected, but users should take care when analysing the series as a whole. Temperature data, where available, appear to be in generally good order.

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. 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.

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) 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

Marine Scotland mooring (810w), North Scotland

The mooring was located at 58° 33.06' N, 04° 14.65' W in a nominal water depth of 30m.

The mooring was deployed off the north coast of Scotland on 29 October 2011 by Marine Scotland during FRV Scotia cruise 1311S and was recovered on 02 November 2011 during the same cruise. Instrumentation details are included in the following table.

Cruise

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:

SeaDataNet Quality Control Flags

The following single character qualifying flags may be associated with one or more individual parameters with a data cycle: