Metadata Report for BODC Series Reference Number 1640400

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

CTD or STD cast

Instrument Type

Name	Categories
Sea-Bird SBE 19 SEACAT CTD	CTD; water temperature sensor; salinity sensor

Instrument Mounting

ship

Originating Country

France

Originator

Dr Valerie Quiniou-Ramus

Originating Organization

Total S.A.

Processing Status

QC in progress

Online delivery of data

Download not available

Project(s)

SIMORC

Data Identifiers

Originator's Identifier	SIMORC_ICHTHYS_P8_20081103_47090_0_V2
BODC Series Reference	1640400

Time Co-ordinates(UT)

Start Time (yyyy-mm-dd hh:mm)	2008-11-02 22:11
End Time (yyyy-mm-dd hh:mm)	-
Nominal Cycle Interval	-

Spatial Co-ordinates

Latitude	12.74340 S ( 12° 44.6' S )
Longitude	126.70600 E ( 126° 42.4' E )
Positional Uncertainty	0.01 to 0.05 n.miles
Minimum Sensor or Sampling Depth	0.0 m
Maximum Sensor or Sampling Depth	82.0 m
Minimum Sensor or Sampling Height	1.0 m
Maximum Sensor or Sampling Height	83.0 m
Sea Floor Depth	83.0 m
Sea Floor Depth Source	DATAHEAD
Sensor or Sampling Distribution	Variable common depth - All sensors are grouped effectively at the same depth, but this depth varies significantly during 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
ACYCAA01	1	Dimensionless	Sequence number
DEPHPR01	1	Metres	Depth (spatial coordinate) relative to water surface in the water body by profiling pressure sensor and conversion to seawater depth using UNESCO algorithm
PSALST01	1	Dimensionless	Practical salinity of the water body by CTD and computation using UNESCO 1983 algorithm
TEMPST01	1	Degrees Celsius	Temperature of the water body by CTD or STD

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

SIMORC Total Ichthys CTD Data Quality Report

Narrative

SeaBird SBE19 CTDs were deployed on the Ichthys-Maret Island and Ichthys-Champagny Island pipeline routes, Australia.

Data Quality Information

The following data quality checks were applied

Density profiles with depth were used as a guide to flagging temperature and salinity, whereby physically infeasible density inversions were used as the trigger for flagging salinity.
Changes in temperature, salinity, or dissolved oxygen concentration too large to be physically feasible were flagged suspect.
Beginning and End flags were applied to each profile to mark when the CTD was clearly in the water and the data outside this range should be treated with caution.

The salinity channel was heavily flagged as large spikes were recorded when the CTD was lowered through a thermocline. This data should be used with caution.

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

Sea-Bird SBE 19 and SBE 19plus SEACAT Profiler CTDs

The SBE 19 SEACAT Profiler is a self-contained, battery powered, pumped CTD system designed to measure conductivity, temperature, and pressure in marine or fresh water environments to depths of 10,500 meters. It was replaced by the SBE 19plus model in 2001. An updated version of this instrument is the SBE 19plus V2, which incorporates an electronics upgrade and additional features, with six differentially amplified A/D input channels, one RS-232 data input channel, and 64 MB FLASH memory.

The standard CTD unit comes with a plastic housing (rated to 600 m), although this can be replaced by titanium housing for depths up to 7000 m. It is typically used for CTD profiling although a conversion kit is available for mooring deployments. The CTD can also be attached to an SBE 36 CTD Deck Unit and Power/Data Interface Module (PDIM) for real-time operation on single-core armored cable up to 10,000 m.

Specifications

Parameter	SBE 19	SBE 19plus
Temperature	Range: -5 to +35 °C Accuracy: 0.01 °C Resolution: 0.001 °C Calibration: +1 to +32 °C*	Range: -5 to +35 °C Accuracy: 0.005 °C Resolution: 0.0001 °C Calibration: +1 to +32 °C*
Conductivity	Range: 0 to 7 S m^-1 (0 to 70 mmho cm^-1) Accuracy: 0.001 S m^-1 Resolution: 0.0001 S m^-1 Calibration: 0 to 7 S m^-1. Physical calibration over the range 1.4 - 6 S m^-1*	Range: 0 to 9 Sm^-1 Accuracy: 0.0005 Resolution: 0.00005 (most oceanic waters, resolves 0.4 ppm in salinity); 0.00007 (high salinity waters, resolves 0.4 ppm in salinity); 0.00001 (fresh waters, resolves 0.1 ppm in salinity) Calibration: 0 to 9 S m^-1. Physical calibration over the range 1.4 - 6 S m^-1*
Strain gauge pressure sensor	Range: 0 to100, 150, 300, 500, 1000, 1500, 3000, 5000, 10000 or 15000 psia Accuracy: 0.25% of full scale range (100 - 1500 psia); 0.15% of full scale range (3000 - 15000 psia) Resolution: 0.015% of full scale Calibration: 0 to full scale in 20% steps	Range: 0 to 20, 100, 350, 1000, 2000, 3500 or 7000 m Accuracy: 0.1% of full scale range Resolution: 0.002% of full scale range Calibration: ambient pressure to full scale range in 5 steps

Parameter

SBE 19

SBE 19plus

Temperature

Range: -5 to +35 °C

Accuracy: 0.01 °C

Resolution: 0.001 °C

Calibration: +1 to +32 °C*

Range: -5 to +35 °C

Accuracy: 0.005 °C

Resolution: 0.0001 °C

Calibration: +1 to +32 °C*

Conductivity

Range: 0 to 7 S m^-1 (0 to 70 mmho cm^-1)

Accuracy: 0.001 S m^-1

Resolution: 0.0001 S m^-1

Calibration: 0 to 7 S m^-1. Physical calibration over the range 1.4 - 6 S m^-1*

Range: 0 to 9 Sm^-1

Accuracy: 0.0005

Resolution: 0.00005 (most oceanic waters, resolves 0.4 ppm in salinity); 0.00007 (high salinity waters, resolves 0.4 ppm in salinity); 0.00001 (fresh waters, resolves 0.1 ppm in salinity)

Calibration: 0 to 9 S m^-1. Physical calibration over the range 1.4 - 6 S m^-1*

Strain gauge pressure sensor

Range: 0 to100, 150, 300, 500, 1000, 1500, 3000, 5000, 10000 or 15000 psia

Accuracy: 0.25% of full scale range (100 - 1500 psia); 0.15% of full scale range (3000 - 15000 psia)

Resolution: 0.015% of full scale

Calibration: 0 to full scale in 20% steps

Range: 0 to 20, 100, 350, 1000, 2000, 3500 or 7000 m

Accuracy: 0.1% of full scale range

Resolution: 0.002% of full scale range

Calibration: ambient pressure to full scale range in 5 steps

*Measurements outside this range may be at slightly reduced accuracy due to extrapolation errors.

Options and accessories

Additional sensors can be attached to the CTD, including:

high accuracy Paroscientific Digiquartz pressure sensor (depth range 0 to 20, 60, 130, 200, 270, 680, 1400, 2000, 4200, 7000 or 10500 m; accuracy 0.02% of full scale; resolution 0.0025% of full scale)
Dissolved Oxygen (SBE 43 DO Sensor)
pH* (SBE 18 pH Sensor or SBE 27 pH/ORP Sensor)
fluorescence
radiance (PAR)
light transmission
optical backscatter (turbidity)

The standard SBE 5M pump may be replaced by an SBE 5P (plastic housing) or 5T (titanium housing) pump for use with dissolved oxygen and/or other pumped sensors. Further details can be found in the manufacturer's SBE 19plus V2 instrument specification or theSBE 19 andSBE 19 plus user guides.

BODC Processing

Data were received by BODC in Excel spreadsheets which were unstable. They were stabilised as .txt files and then reformatted to QXF format using BODC transfer function 518. The following table shows how the variables within the files were mapped to the appropriate BODC parameter codes:

Original parameter name	Original Units	Description	BODC Parameter Code	BODC Units
Time	DD-MON-YY hh:mm:ss	Date and time (Western Standard Time)	AADYAA01 + AAFDZZ01	Day number and day fraction (GMT)
TEMP	degrees Celsius	Sea temperature	TEMPST01	degrees Celsius
Depth	metres	Instrument depth	DEPHPR01	metres
Salinity	PSU	Salinity	PSALST01	PSU
Oxygen	umol/l	Dissolved oxygen concentration	DOXYZZ01	umol/l
Conductivity	Siemens/metre	Conductivity	DEPHPR01	Siemens/metre

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

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

Cruise

Cruise Name	2008
Departure Date	2008-10-23
Arrival Date	2008-11-10
Principal Scientist(s)	Unknown (Unknown)
Ship	MV Bhagwan K

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