Metadata Report for BODC Series Reference Number 1644935

• 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

SIMORC TOTAL Australia ICHTHYS - ADCP Data Narrative

Narrative

Ten ADCP were deployed on ten moorings.

Data Quality Information

The following data quality checks were applied

• Changes in direction of over 45 degrees over consecutive datacycles were flagged suspect.
• Speeds stuck at zero for more than 1 consecutive datacycle were flagged suspect.

The ADCP data were found to be of good quality although the the shallowest bin did show repeated occurrences of zero speeds recorded for several consecutive datacycles. These were flagged suspect.

Data Access Policy

SIMORC data access conditions

The data collated and held at BODC on behalf of the SIMORC project are restricted. However, the data will be available to download from the Official SIMORC Website, as part of the project protocol. The data set will initially include data from the oil companies TOTAL, Shell and BP.

Narrative Documents

RD Instruments 300kHz Workhorse Sentinel Acoustic Doppler Current Profiler

Specifications

The manufacturer's specification document can be found here

BODC Processing

Data were received by BODC in Excel files. There were converted to MATLAB files (.mat). Analysis of the .mat files showed systematic timestamp duplication between the 1st and 01:00 a.m. and 02:00 a.m. on the December 3rd 2006. For each of the 4 datafiles, 6 datacycles were affected. For the first 3 datacycles, all associated data was set to NaN. The 3 final datacylcles were deleted. After that, all the datafiles were reformatted to QXF format using BODC transfer function 524. The following table shows how the variables within the files were mapped to the appropriate BODC parameter codes:

Following transfer to QXF, the data were screened using BODC's in-house visualisation software, EDSERPLO.

Originator's Data Processing

Data processing

Data were processed and quality controlled by Inpex Browse Ltd as follows:

• Data was adjusted from magnetic to true north using a magnetic variation of 2.7°E.
• The accuracy of the recorded data timing wad checked by comparing the elapsed deployment time according to the instrument clock, with that according to the calibrated digital watch. All instruments have performed (+/- 2 seconds by day), no timing corrections were performed.
• ADCP's data were removed by selecting 75% good pings threshold.
• Finally, time history checks were produced and quality controlled by an oceanographer prior to and after the removal of suspicious and corrupted data.

Project Information

System of Industry Metocean data for the Offshore and Research Communities (SIMORC)

The EU-funded SIMORC project is a collaborative effort between MARIS (Netherlands), BODC (UK), the International Association of Oil and Gas Producers (OGP) and IOC-IODE to provide a harmonised and quality controlled metocean data set from data collected by oil and gas producers, accessible through the SIMORC protocol.

Data Activity or Cruise Information

Data Activity

SIMORC Total Ichthys - Maret Island LNG ADCP mooring.

The survey at this site was made up of a single mooring.

This mooring was deployed in a water depth (defined as the Lowest Astronomical Tide) of 25 metres. (Nominal position of 14.4517°S, 124.9889°E):

On December 5th 2006, the mooring was repositioned to a water depth (defined as the Lowest Astronomical Tide) of 24 metres. (Nominal position of 14.4516°S, 124.9889°E):

On February 4th 2007, the mooring was repositioned to a water depth (defined as the Lowest Astronomical Tide) of 25 metres. (Nominal position of 14.45155°S, 124.9889°E):

On April 26th 2007, the mooring was repositioned to a water depth (defined as the Lowest Astronomical Tide) of 25 metres. (Nominal position of 14.45167°S, 124.9891°E):

Related Data Activity activities are detailed in Appendix 1

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:

Appendix 1: ICHTHYS Maret Island LNG

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.