Metadata Report for BODC Series Reference Number 1623408
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 |
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Time Co-ordinates(UT) |
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Parameters |
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Problem Reports
No Problem Report Found in the Database
Originator's quality control comments for PD37_06 COBS moorings
Data supplied to BODC were accompanied by data quality notes from the Originator that detailed observations made when the data were processed and subsequent processing decisions. A summary of these notes have been provided in the tables below.
Rig#985
Instrument | Serial number | Instrument depth | Data quality comments |
---|---|---|---|
Sea-Bird MicroCAT | 02991 | 5 m | The temperature data from this instrument are of good quality. Comparison checks performed against CTD data found a consistent offset of -0.0039 S m-1 in the conductivity channel (distance between CTD and mooring of less than 400 m at deployment and less than 300 m at recovery). An offset correction of +0.0039 S m-1 has been applied to these data. |
Sea-Bird MicroCAT | 04998 | 10 m | None. |
Rig#986
Instrument | Serial number | Instrument depth | Data quality comments |
---|---|---|---|
Sea-Bird 16+ SEACAT fitted with Seapoint Turbidity Meter #10471 | 04597 | Located on seabed | The conductivity data became unrealistic after 2007-01-17 12:00:03 UTC and has been converted to absent data values. Comparisons performed against the data recorded by the two MicroCATs present at this site found an offset of -0.04 in salinity and -0.01°C in temperature. Offset corrections of +0.04 in salinity and +0.01°C in temperature have been applied to this series. |
Teledyne RDI 600 kHz ADCP | 5806 | Located on seabed | To correct for the magnetic declination (difference between magnetic north and true north) latitude values were changed by -3.754°. All latitude values were modified by +0.64521° to correct for the compass error. |
Rig#988
Instrument | Serial number | Instrument depth | Data quality comments |
---|---|---|---|
Sea-Bird 16+ SEACAT fitted with Seapoint Turbidity Meter #10489 | 04737 | Located on seabed | There was only one CTD available close to deployment, and none available at recovery to perform the CTD comparison checks, meaning it was not possible for the originator to determine whether an offset was affecting these data. For this reason the Data Originator recommends that these data are used with caution. |
Teledyne RDI 600 kHz ADCP | 5807 | Located on seabed | To correct for the magnetic declination (difference between magnetic north and true north) latitude values were changed by -3.866°. All latitude values were modified by +2.7419° to correct for the compass error. |
Data Access Policy
Open Data supplied by Natural Environment Research Council (NERC)
You must always use the following attribution statement to acknowledge the source of the information: "Contains data supplied by Natural Environment Research Council."
Narrative Documents
Teledyne RDI Workhorse Sentinel 600 kHz Acoustic Doppler Current Profiler (ADCP)
The Workhorse Sentinel is a self-contained ADCP that can be used either on a mooring or mounted in the hull of a moving vessel. Its 4-beam design provides a redundant data source (in case of a blocked or damaged beam), an independent data quality measure (error velocity) and reduces the variance in data, thereby improving data reliability, quality and accuracy.
Real-time data can be transmitted to shore via a cable link or acoustic modem or they can be stored internally. Sensors for bottom tracking, pressure and directional wave measurements can be added to the instrument and a special casing is available for deeper applications.
Specifications
Typical range | 50 m |
Number of depth cells | 1 to 128 |
Typical ping rate | 2 Hz |
Standard depth rating | 200 to 6000 m |
Beam angle | 20 ° |
Echo intensity profile | |
Dynamic range | 80 dB |
Precision | ± 1.5 dB |
Velocity | |
Accuracy | 0.3% of the water velocity relative to the ADCP ± 0.3 cm s -1 |
Resolution | 0.1 cm s -1 |
Range | ± 5 m s -1 (default) ± 20 m s -1 (maximum) |
Vertical resolution | Range / Std Dev |
for 0.5 m | 39 m / 12.9 cm s -1 |
for 1 m | 43 m / 6.1 cm s -1 |
for 2 m | 47 m / 3.0 cm s -1 |
for 4 m | 52 m / 2.0 cm s -1 |
Long Range mode | |
Range | 70 m |
Depth cell size | 4 m |
Std Deviation | 4.2 cm s -1 |
Temperature | |
Operating temp. | -5 to 45 °C |
Precision | ± 0.4 °C |
Resolution | 0.01 °C |
Tilt | |
Range | ± 15 ° |
Accuracy | ± 0.5 ° |
Precision | ± 0.5 ° |
Resolution | 0.01 ° |
Compass | |
Accuracy | ± 2 ° |
Resolution | 0.01 ° |
Maximum tilt | ± 15 ° |
Precision | ± 0.5 ° |
Further details can be found in the manufacturer's specification sheet .
BODC Processing document for Coastal Observatory moored ADCP data
The data arrived at BODC as 117 ASCII format .dat files representing moored ADCP data recorded at the Coastal Observatory sites 1(9), 20 and 21 between 07 August 2002 and 20 September 2011. Following standard BODC procedure the files were reformatted into BODC standard internal format using an internal transfer function. This included removing surface null bins.
The following table shows how the originator's variables were mapped to the appropriate BODC parameter codes:
Originator's variable | Units | Description | BODC parameter code | Units | Comments |
---|---|---|---|---|---|
Sea surface height | m | Surface elevation (Mean Water Height) of the water body by acoustic doppler current profiler (ADCP) | ASLVMWHA | Metres | - |
East | cm/s | Eastward current velocity (Eulerian) in the water body by moored acoustic doppler current profiler (ADCP) | LCEWAP01 | cm s -1 | - |
North | cm/s | Northward current velocity (Eulerian) in the water body by moored acoustic doppler current profiler (ADCP) | LCNSAP01 | cm s -1 | - |
Vertical | cm/s | Upward current velocity in the water body by moored acoustic doppler current profiler (ADCP) | LRZAAP01 | cm s -1 | - |
Error | cm/s | Current velocity error in the water body by moored acoustic doppler current profiler (ADCP) | LERRAP01 | cm s -1 | - |
3beam_matrix | None | - | - | - | Boolean value stating whether the data originator had performed the three beam correction on a particular bin. Values indicating that the three beam correction had been performed were converted into an originator's flag ('L') when the data were transferred into qxf format. |
Height from sea bed | m | Height above bed (ADCP bin) in the water body | HBINAA01 | Metres | - |
The reformatted data were visualised using the in-house EDSERPLO software. Suspect data were marked by adding an appropriate quality control flag, missing data by both setting the data to an appropriate value and setting the quality control flag.
COBS RDI Teledyne 600 kHz ADCP Data Processing
Sampling Strategy
Two mooring sites were maintained for the duration of the Liverpool Bay Coastal Observatory project. Moored instruments present at Site A (also known as Site 1/9) through the entire data collection phase of the observatory. From 05 April 2005 (Cruise PD11_05) moorings were also present at an additional Site B. From April 2005 until December 2009 mooring Site B was located at Coastal Observatory Station 20. The moorings were moved to Station 21 from January 2010, where they remained until the end of the observatory.
Originator's Processing
The raw ADCP data were processed using the standard RDI software bblist which resulted in the creation of two files, the first containing the current velocities separated by bin depth and an auxiliary file containing the variables heading, pitch, roll, temperature and pressure. The variables present in the auxiliary files were only used for quality control purposes with the exception of pressure, which was used to calculate sea surface height taking into account the latitude and the height of the transducer head above the seabed, which was estimated to be 0.7 m. Sea surface height and the current velocity data were then combined into one file.
Before the data were supplied to BODC, some quality control procedures were performed by the Data Originator. First the Originator corrected the latitude values to take into account the difference between magnetic north and true north (magnetic declination). The Originator also corrected the latitude values for compass error caused by localised magnetic fields such as the ADCP frame and battery, using HF radar data recorded by two HF radars located at Abergele and Formby as a reference. Once compass errors for all ADCP series recorded at Site A had been calculated, a mean of all errors was taken. As the ADCP compass error is a random error, the expected mean of all errors is approximately 0°, however the Originator found that the actual mean compass error was approximately 5.3°. All compass errors were therefore modified by 5.3°. The compass error values given in the Originator's data processing documents have taken this adjustment into account.
The bins recorded above the sea surface were then converted to absent data indicators by the Data Originator. If there were any problems with the pressure data recorded by the ADCP, then data from another instrument attached to the same frame was used instead. If no pressure records were available, then backscatter intensity was used to calculate the sea surface. The top three bins have been removed in all series to remove noise in these data caused by side lobe contamination. A more detailed explanation of all of the quality control procedures performed before the data were submitted to BODC can be found in the Originator's ADCP quality control methodology document.
Analysis of the Coastal Observatory ADCP data found that some of the midwater beams had been contaminated, with the Originator suspecting that the cause was the contamination of individual acoustic beams by the recovery line attached to the ADCP lander frame. As the contamination only affected individual acoustic beams, it was possible to estimate the horizontal component of the contaminated beam using the vertical components of the two perpendicular beams and the unaffected horizontal component. A full description of how this procedure was carried out can be found in the Originator's ADCP correction report
Finally a visual inspection of the data was carried out to find any obvious errors which had not been corrected by the previous quality control checks.
Project Information
Proudman Oceanographic Laboratory Coastal Observatory
The Coastal Observatory was established by Proudman Oceanographic Laboratory as a coastal zone real time observing and monitoring system. The main objective is to understand a coastal sea's response both to natural forcing and to the consequences of human activity. Near real-time measurements will be integrated with coupled models into a pre-operational coastal prediction system whose results will be displayed on the World Wide Web.
The Observatory is expected to grow and evolve as resources and technology allow, all the while building up long time series. A site selection pilot study was carried out in September 2001 and the Observatory became operational in August 2002.
The site is located in Liverpool Bay and is subject to typical coastal sea processes, with strong tides, occasional large storm surges and waves, freshwater input, stable and unstable stratification, high suspended sediment concentration and biogeochemical interaction. Measurements and monitoring will focus on the impacts of storms, variations in river discharge (especially the Mersey), seasonality and blooms in Liverpool Bay.
A variety of methods will be used to obtain measurements, including:
- Moored instruments for in situ time series of currents, temperature and salinity profiles, and surface waves and meteorology. It is hoped that turbidity and chlorophyll measurements will be made at another site as the Observatory progresses;
- The Cefas Smartbuoy for surface properties such as nutrients and chlorophyll, starting late 2002;
- R.V. Prince Madog to carry out spatial surveys and service moorings;
- Instrumented ferries for near surface temperature, salinity, turbidity, chlorophyll and nutrients. The first route will be Liverpool to Douglas, Isle of Man, starting late 2002;
- Drifters for surface currents and properties such as temperature and salinity, starting in 2004;
- Tide gauges, with sensors for meteorology, waves, temperature and salinity, where appropriate;
- Meteorological data from Bidston Observatory and Hilbre Island, HF radar and tide gauge sites;
- Shore-based HF radar measuring waves and surface currents out to a range of 50 km, starting in 2003;
- Satellite data, with infrared for sea surface temperature and visible for chlorophyll and suspended sediment.
The partners currently involved with the project are listed below:
- Proudman Oceanographic Laboratory
- British Oceanographic Data Centre
- UK Meteorological Office
- Centre for Environment, Fisheries and Aquaculture Science
- Environment Agency
- Liverpool University and Port Erin Marine Laboratory
- Bangor University School of Ocean Sciences
- National Oceanography Centre Southampton
- Department of Agriculture and Rural Development in Northern Ireland
A summary of Coastal Observatory cruises to date on R.V. Prince Madog is given in the table below:
Year | No. of cruises | Work summary |
---|---|---|
2001 | 1 | Site selection and pilot study. 95 CTD casts. |
2002 | 4 | POL moorings deployed and serviced Cefas Waverider and SmartBuoy deployed and serviced 103 CTD casts |
2003 | 10 | POL moorings serviced Cefas Waverider and SmartBuoy serviced 341 CTD/LISST casts |
2004 | 9 | POL moorings serviced Cefas Waverider and SmartBuoy serviced 347 CTD/LISST casts |
2005 | 9 | POL moorings serviced Cefas Waverider and SmartBuoy serviced 268 CTD/LISST casts |
2006 | 11 | POL moorings serviced Cefas Waverider and SmartBuoy serviced 508 CTD/LISST casts |
2007 | 9 | POL moorings serviced Cefas Waverider and SmartBuoy serviced 471 CTD/LISST casts |
2008 | 9 | POL moorings serviced Cefas Waverider and SmartBuoy serviced 260 CTD/LISST casts |
2009 | 7 | POL moorings serviced Cefas Waverider and SmartBuoy serviced 213 CTD/LISST casts |
2010 | 8 | POL moorings serviced Cefas Waverider and SmartBuoy serviced 268 CTD/LISST casts |
2011 | 6 | POL moorings serviced Cefas Waverider and SmartBuoy serviced 307 CTD/LISST casts to date, ongoing |
Data Activity or Cruise Information
Data Activity
Start Date (yyyy-mm-dd) | 2006-12-15 |
End Date (yyyy-mm-dd) | 2007-02-14 |
Organization Undertaking Activity | Proudman Oceanographic Laboratory (now National Oceanography Centre, Liverpool) |
Country of Organization | United Kingdom |
Originator's Data Activity Identifier | POLRIG986 |
Platform Category | subsurface mooring |
Proudman Oceanographic Laboratory Rig#986
Deployment and Recovery
This rig was deployed as part of the Liverpool Bay Coastal Observatory during R.V. Prince Madog cruise PD37_06. All of the major moorings objectives were accomplished during this cruise. Recovery of the rig took place during R.V. Prince Madog cruise PD02_07.
Rig Position | 53° 32.040'N 3° 21.4698'W |
---|---|
Water Depth | 24.7 m |
Deployed (UT) | 2006-12-15 09:09 UTC |
Recovered (UT) | 2007-02-14 12:09 UTC |
No. of days | 61 |
Rig Description
This rig was a bottom frame comprising of the following instruments 0.5 m above the seabed; Waves Acoustic Doppler Current Profiler (ADCP), a SonTek ADV Logger and a SeaBird 16plus. The frame was fitted with two Benthos releases s/n 71922 (Rx 11.5 kHz, Tx 12.0 kHz, release A) and s/n 72858 (Rx 14.5 kHz, Tx 12.0 kHz, release A) both fitted with a fizz link and a spooler with 150m of rope for recovery of the ballast weight.
Instrument | Serial Number | Parameters Measured | Sampling Description | Comments |
---|---|---|---|---|
RDI 600 kHz Waves ADCP | 5806 | Horizontal current velocity components Vertical current velocity components Temperature Pressure | Mode 1: 100 pings every 10 minutes (velocity standard deviation 0.007 m s-1). 35 x 1 m bins (2.65 - 36.65 m above the bed). | Sound velocity calculated from temperature, depth and salinity of 32. Beam co-ordinates - speeds, correlation, echo intensity, % good. Fitted with a pressure sensor and 1 Gbyte PCMCIA memory; hourly wave recording enabled. Clock set at 15:25:15 UTC 2006-12-12; delayed start 08:00:00 UTC 2006-12-13. |
Sea-Bird 16plus V RS-485 1.0 | 4597 | Temperature Conductivity Pressure Turbidity | Sample interval 600 s; digiquartz integration time 40 s, range 400; pump 0.5 s, 1 s delay. | Fitted to base of frame with pumped conductivity sensor underneath. SeaPoint turbidity sensor 10471 taped to roll bar; set up for 0 - 125 FTU range. Clock set at 14:25:10 UTC 2006-12-12; delayed start at 08:00:00 UTC 2006-12-13. |
SonTek ADV (Acoustic Doppler Velocimeter) | ADV Logger G250; sensor B252H. | Current velocity and direction at a small sampling volume at a fixed (10cm) distance from probe using 3D Doppler techniques. | Sample rate 16 Hz; burst interval 3600 s; | Changed compass orientation to up. Clock set at 15:55:00 UTC on 2006-12-12; Delayed start at 08:00:00 UTC on 2007-12-13. |
Other Series linked to this Data Activity - 753118
Cruise
Cruise Name | PD37/06 |
Departure Date | 2006-12-14 |
Arrival Date | 2006-12-15 |
Principal Scientist(s) | Phil J Knight (Proudman Oceanographic Laboratory) |
Ship | RV Prince Madog |
Complete Cruise Metadata Report is available here
Fixed Station Information
Fixed Station Information
Station Name | COA |
Category | Offshore area |
Latitude | 53° 31.51' N |
Longitude | 3° 23.00' W |
Water depth below MSL | 26.0 m |
Liverpool Bay Coastal Observatory Mooring Site A (COA/Site 1/Site 9)
This station is the main mooring site for the Proudman Oceanographic Laboratory (POL) Liverpool Bay Coastal Observatory and was first occupied in 2002. It is also known both as Coastal Observatory Site 1 and Site 9. POL perform two main types of activities at this station: they deploy moorings; and in addition, they take CTD profiles during each site visit. The station lies within a box of mean water depth 22.5 m with the following coordinates:
Box Corner | Latitude (+ve North) | Longitude (+ve East) |
---|---|---|
North-west corner | 53.54097 | -3.42958 |
South-east corner | 53.50945 | -3.33714 |
The position of this station relative to the other POL Coastal Observatory sites can be seen from the figure below.
Mooring Deployment History
2011
Rig Type | Typical Instruments | Rig IDs | Comment |
---|---|---|---|
Frame | ADCP, CTD, OBS, OXY | 1117, 1121, 1125, 1127, 1130, 1132, | January - November |
SmartBuoy | CTD x 2, AC-S, CT x 2, FL x 3, OBS x 2, PAR x 2, WMS, NAS, OXY, T x 2 | 1116, 1120, 1124 | January - November |
2010
Rig Type | Typical Instruments | Rig IDs | Comment |
---|---|---|---|
Frame | ADCP, CTD, ADV, OBS | 1086, 1090, 1094, 1098, 1102, 1106, 1109 | January - December |
SmartBuoy | CT x 2, FL x 2, OBS, PAR x 2, WMS, NAS, CTD, OXY, BD, T | 1085, 1089, 1093, 1097, 1101, 1105, 1108, 1112 | January - December |
2009
Rig Type | Typical Instruments | Rig IDs | Comment |
---|---|---|---|
Frame | ADCP, CTD, ADV, OBS | 1055, 1062, 1067, 1071, 1074, 1078, 1082 | January - December |
SmartBuoy | CT x 2, FL x 2, OBS, PAR x 2, WMS, NAS, CTD, OXY, BD, T | 1054, 1061, 1066, 1070, 1073, 1077, 1081 | January - December |
2008
Rig Type | Typical Instruments | Rig IDs | Comment |
---|---|---|---|
Frame | ADCP, CTD, ADV, OBS | 1024, 1028, 1032, 1036, 1041, 1044, 1047, 1051 | January - December |
SmartBuoy | CT x 2, FL x 2, OBS, PAR x 2, WMS, NAS, CTD, OXY, BD, T | LB1_047/1023, LB1_048/1027, LB1_049/1031, LB1_050/1035, 1040, 1043, LB1_053/1050 | January - December |
2007
Rig Type | Typical Instruments | Rig IDs | Comment |
---|---|---|---|
Frame | ADCP, CTD, ADV, OBS | 990, 997, 1001, 1005, 1010, 1014, 1017, 1021 | January - December |
SmartBuoy | CT x 2, FL x 2, OBS, PAR x 2, WMS, NAS, CTD, OXY, BD, T | LB1_039/989, LB1_040/996, LB1_041/1000, LB1_042/1004, LB1_043/1009, LB1_044/1013, LB1_045/1016, LB1_046/1020 | January - December |
2006
Rig Type | Typical Instruments | Rig IDs | Comment |
---|---|---|---|
Frame | ADCP, CTD, ADV, OBS | 951, 962, 966, 970, 974, 978, 982, 986 | January - December |
SmartBuoy | CT x 2, FL x 2, OBS, PAR x 2, WMS, NAS, CTD, OXY, BD | 958, 961, 965, 969, 973, 977, LB1_037/981, LB1_038/985 | January - December |
2005
Rig Type | Typical Instruments | Rig IDs | Comment |
---|---|---|---|
Frame | ADCP, CT | 913, 914, 921, 925, 929, 933, 938, 942, 945, 949 | January - December |
SmartBuoy | CT, FL, OBS, PAR, WMS, NAS, OXY | 912, 920, 924, 928, 932, 937, LB1_028/941, LB1_029/944, LB1_030/948 | January - December |
Frame with telemetry buoy | ADCP | 914 | March - April |
2004
Rig Type | Typical Instruments | Rig IDs | Comment |
---|---|---|---|
Frame | BPR, ADCP, TR, CT | 890, 892, 893, 896, 898, 900, 902, 904, 907, 908, 910, 911 | January - December |
SmartBuoy | CT, FL, OBS, PAR, WMS, NAS | 889, 891, 895, 897, 899, 901, 903, 906, 909 | January - December |
Frame with telemetry buoy | ADCP | 893, 908, 911 | April - May, October - December |
2003
Rig Type | Instruments | Rig IDs | Comment |
---|---|---|---|
Frame | BPR, ADCP, TR, CT | 861, 864, 866, 869, 872, 878, 880, 883, 885, 887, 888 | January - December |
SmartBuoy | CT, FL, OBS, PAR, WMS, NAS | 863, 865, 867, 870, 871, 877, 879, 882, 884, 886 | January - December |
2002
Rig Type | Instruments | Rig IDs | Comment |
---|---|---|---|
Frame | BPR, ADCP, TR, CT | 851, 854, 856, 858 | August - December |
Line mooring | CT x 3 | 853, 855 | August - November |
SmartBuoy | CT, FL, OBS, PAR, WMS, NAS | 857, 860 | November - December |
2001
Rig Type | Instruments | Rig IDs | Comment |
---|---|---|---|
Frame | ADCP, OBS | 838, 839, 840, 841, 843, 844, 845, 846, 848, 849 | September |
CTD Sampling History
Year | Number of Cruises | Total Casts per year |
2011 | 6 | 116 including a 46 cast tidal cycle from 2011-04-18 to 2011-04-19 and a 51 cast tidal cycle station from 2011-07-27 to 2011-07-28 |
2010 | 8 | 71 including a 52 cast tidal cycle station from 2010-04-28 to 2010-04-29 |
2009 | 7 | 21 |
2008 | 9 | 75 including a 54 cast tidal cycle station from 2008-05-13 to 2008-05-14 |
2007 | 8 | 71 including a 51 cast tidal cycle station from 2007-05-15 to 2007-05-16 |
2006 | 9 | 72 including a 53 cast tidal cycle station from 2006-05-09 to 2006-05-10 |
2005 | 9 | 41 including a 22 cast tidal cycle station from 2005-04-05 to 2005-04-06 |
2004 | 9 | 77 including a 54 cast tidal cycle station from 2004-05-11 to 2004-05-12 |
2003 | 10 | 28 |
2002 | 4 | 13 |
The CTD instrument package for these cruises was a Sea-Bird 911plus, with beam transmissometer, fluorometer, LICOR PAR sensor, LISST-25, and oxygen sensor.
Key
AC-S = Absorption and attenuation spectrophotometer
ADCP = Acoustic Doppler Current Profiler
ADV = Acoustic Doppler Velocimeter
BD = Bacterial degradation experiment
BPR = Bottom Pressure Recorder
CT = Conductivity and temperature logger
CTD = Conductivity, temperature, depth sensor
FL = Fluorometer
NAS = in-situ nutrient analyser
OBS = Optical Backscatter Turbidity meter
OXY = Oxygen sensor
PAR = PAR sensor
T = Temperature logger
TR = Transmissometer
WMS = Automatic water sampler
Other Series linked to this Fixed Station for this cruise - 747057 747162 747266 747334 747395 747451 747499 747506 752951 753026 753118 1003634 1003646
Other Cruises linked to this Fixed Station (with the number of series) - CO 01/12 (5) PD01/08 (17) PD01/11 (14) PD02/03 (10) PD02/05 (11) PD02/07 (15) PD02/09B (17) PD02/10 (15) PD04/06 (1) PD05/10 (16) PD06/04 (12) PD06/07 (16) PD07/08 (14) PD07/11 (17) PD09/06 (11) PD09/07 (64) PD09/08 (16) PD10/03 (9) PD10/10 (14) PD11/04B (13) PD11/05 (9) PD11/11 (57) PD12/05 (2) PD12/09 (16) PD13/07 (14) PD14/08 (67) PD16/06 (9) PD16/07 (15) PD17/03 (12) PD17/10 (15) PD18/04 (13) PD18/05 (11) PD18/09 (17) PD19/08 (2) PD20/02 (7) PD20/06 (9) PD20/07 (17) PD21/05 (10) PD21/10 (15) PD21/11 (9) PD22/04 (13) PD22/06 (9) PD23/03A (10) PD23/07 (15) PD23/08 (13) PD24/02 (2) PD24/09 (17) PD25/03B (12) PD25/05 (11) PD25/06 (9) PD25/11 (7) PD27/07 (17) PD29/04 (12) PD29/06 (9) PD29/08 (14) PD29/10 (17) PD30/05 (10) PD31/02 (11) PD31/03 (12) PD32/04 (12) PD33/08 (5) PD33/09 (16) PD34/03 (12) PD34/05 (10) PD35/02 (11) PD35/06 (14) PD36/10 (16) PD37/08 (18) PD38/03 (13) PD38/04 (12) PD38/09 (16) PD41/05 (11) PD43/11 (11) PD44/03 (7) PD47/09 (15) PD48/03 (5) PD48/04 (8) PD48/05 (10) PD49/10 (14) PD52/04 (8)
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 |
Q | value below limit of quantification |