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Metadata Report for BODC Series Reference Number 1742917


Metadata Summary

Data Description

Data Category Currents -subsurface Eulerian
Instrument Type
NameCategories
Nortek Aquadopp 6000 3D Doppler current meter  current meters; water temperature sensor
Instrument Mounting subsurface mooring
Originating Country United Kingdom
Originator Mr Christian Buckingham
Originating Organization University of Southampton School of Ocean and Earth Science
Processing Status banked
Online delivery of data Download available - Ocean Data View (ODV) format
Project(s) OSMOSIS
 

Data Identifiers

Originator's Identifier AQUADOPPAQUADOPP_NW-INNER_201M_SN8362
BODC Series Reference 1742917
 

Time Co-ordinates(UT)

Start Time (yyyy-mm-dd hh:mm) 2012-09-03 13:00
End Time (yyyy-mm-dd hh:mm) 2013-09-06 07:40
Nominal Cycle Interval 600.0 seconds
 

Spatial Co-ordinates

Latitude 48.70000 N ( 48° 42.0' N )
Longitude 16.20600 W ( 16° 12.4' W )
Positional Uncertainty 0.0 to 0.01 n.miles
Minimum Sensor or Sampling Depth 201.0 m
Maximum Sensor or Sampling Depth 201.0 m
Minimum Sensor or Sampling Height 4661.72 m
Maximum Sensor or Sampling Height 4661.72 m
Sea Floor Depth 4862.73 m
Sea Floor Depth Source GEBCO1401
Sensor or Sampling Distribution Fixed common depth - All sensors are grouped effectively at the same depth which is effectively fixed for the duration of the series
Sensor or Sampling Depth Datum Instantaneous - Depth measured below water line or instantaneous water body surface
Sea Floor Depth Datum Chart reference - Depth extracted from available chart
 

Parameters

BODC CODERankUnitsTitle
AADYAA011DaysDate (time from 00:00 01/01/1760 to 00:00 UT on day)
AAFDZZ011DaysTime (time between 00:00 UT and timestamp)
ACYCAA011DimensionlessSequence number
HEADCM011DegreesOrientation (horizontal relative to true north) of measurement device {heading}
LCEWEL011Centimetres per secondEastward velocity of water current (Eulerian measurement) in the water body by in-situ current meter
LCNSEL011Centimetres per secondNorthward velocity of water current (Eulerian measurement) in the water body by in-situ current meter
PRESPS011DecibarsPressure (measured variable) exerted by the water body by fixed in-situ pressure sensor and corrected to read zero at sea level
PTCHFG011DegreesOrientation (pitch) of measurement platform by triaxial fluxgate compass
ROLLFG011DegreesOrientation (roll angle) of measurement platform by triaxial fluxgate compass
SVELCV011Metres per secondSound velocity in the water body by computation from temperature and salinity by unspecified algorithm
TEMPPR011Degrees CelsiusTemperature of the water body

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

From examination of the periods when the recorded pressure is significantly greater than the nominal depth of the moored instrument, BODC consider that for the following periods, data quality is significantly affected by knockdown of all the moorings:

  • Beginning of the mooring deployment to 23rd September 2012.
  • 27th January 2013 to 31st January 2013.
  • 16th February 2013 to 20th February 2013.
  • 6th March 2013 to 7th March 2013.
  • 20th April 2013 to 25th April 2013.
  • 3rd May 2013 to 8th May 2013.
  • 21st May 2013 to 8th June 2013.

During these periods, all parameters have been flagged as suspect and users are advised to use this data with extreme caution.

OSMOSIS RRS Discovery D381A and D381B Moored Current Meter Quality Report

The data originator notes that the quality of this data varies, in that the vertical gradient tends to show pronounced errors at 150m. It was not possible to fully explain or resolve this feature, but it was thought that it could relate to acoustic reverberation from nearby instruments or mooring-related structures.


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

Nortek Aquadopp Open Water Current Meter

This instrument provides 3D acoustic doppler current measurements along with standard measurements of temperature, pressure, tilt and direction. It can be used in real time measurement situations or can log to an internal recorder powered by internal batteries. It can also be configured to measure surface wave height, period and direction concurrently. It has the unique feature of being run in 'diagnostic' mode when set to collect data at 1 Hz frequency in user specified intervals. This allows studies of mooring motion and the performance of other current meters to be conducted. It can be set in various configurations with titanium housings for deployment at greater depths.

Standard Measured Parameters

  • 3D current velocity (East/North/Up, X/Y/Z or Beam 1/2/3)
  • Acoustic signal strength (Beam 1/2/3)
  • Compass
  • Tilt
  • Temperature
  • Pressure
  • Battery voltage
  • Status code
  • Error code

Surface wave monitoring

The standard Aquadopp is suitable for measuring surface wave height, period, and direction, which are calculated using the PUV method whereby spectra are estimated based on a combination of the pressure signal recorded by the instrument (P) and two horizontal components of the wave orbital velocity (U and V). More specifically, the pressure signal is used to provide an estimate of the wave frequency spectrum. The energy in this spectrum is then used to estimate wave height and period. The measurements of the wave orbital velocities are used to provide an estimate of the wave direction. Since these estimates are based on the distribution of wave energy and are not direct measurements of the free surface, they should be considered inferred estimates.

Both the dynamic pressure and the orbital velocities are driven by surface waves. The signals that are associated with these properties are complicated by the fact that they attenuate (that is the signals are weaker) with depth. The exact behaviour of the attenuation is determined by the water depth and the wavelength being observed. The greater the water depth the greater the attenuation; likewise, the shorter the wavelength (or higher the frequency of the wave) the greater the attenuation for a given water depth. This means that the estimation of wave parameters is limited by both water depth and wave frequency.

Specifications

Water Velocity Measurement
Range ± 5 m/s (standard 300 m version)
± 3 m/s (3000 m and 6000 m versions - higher ranges available on request)
Accuracy 1% of measured value ± 0.5 cm/s
Max. sampling rate 1 Hz, 4 Hz also available on request (standard version)
Internal sampling rate 23 Hz
Measurement Area
Measurement cell size 0.75 m
Measurement cell position 0.35 - 5.0 m
Default position 0.35 - 1.8 m
Doppler uncertainty (noise)
Typical 0.5 - 1.0 cm/s
At 1 Hz sampling rate 1.5 cm/s
Echo Intensity
Acoustic frequency 2 MHz
Resolution 0.45 dB
Dynamic range 90 dB
Sensors
Temperature Thermistor embedded in head
Range -4°C to 40°C
Accuracy/resolution 0.1°C / 0.01°C
Time response 10 min
Compass Magnetometer
Accuracy/Resolution 2° / 0.1° for tilt < 20°
Tilt Liquid level
Maximum tilt 30°
Up or down Automatic detect
Pressure Piezoresistive
Range 0 - 300 m (standard), 0 - 3000 m or 0 - 6000 m
Accuracy/resolution 0.5%
Analogue Inputs
No. of channels 2
Voltage supply 12 V
Voltage input 16 bit A/D
Materials
Standard version Delrin with titanium screws
3000 m version Delrin with titanium screws
6000 m version Titanium with Delrin transducer head
Environmental
Operating temperature -4°C to 40°C
Dimensions
Cylinder 568 mm x 75 mm (standard)
619 mm x 84 mm (3000 m version)
625 mm x 84 mm (6000 m version)
Weight in air 3.5 kg (standard)
3.6 kg (3000 m version)
7.6 kg (6000 m version)
Weight in water Neutral (standard)
1.2 kg (3000 m version)
4.8 kg (6000 m version)

Further details can be found in the manufacturer's specification sheets for the Aquadopp, Aquadopp 3000 and Aquadopp 6000.

BODC Processing

The data arrived at BODC in 60 Matlab files representing each Nortek sensor deployed during cruises D381A and D381B. No data file was received from the NE outer mooring serial number 1420, as this failed to log any data.

The data were reformatted to a BODC internal NetCDF format. The following table shows the mapping of variables within the Matlab file to appropriate BODC parameter codes:

Original parameter name Original Units Description BODC Parameter Code BODC Units Comments
mtime Matlab time Date and time from 00:00 01/01/1760 AADYAA01 and AAFDZZ01 Day number and day fraction (GMT) Conversion by transfer
u m.s-1 Northward current velocity (Eulerian) in the water body by in-situ current meter LCNSEl01 cm.s-1 *100
v m.s-1 Eastward current velocity (Eulerian) in the water body by in-situ current meter LCEWEL01 cm.s-1 *100
pressure decibars Pressure (measured variable) exerted by the water body by fixed in-situ pressure sensor and corrected to read zero at sea level PRESPS01 decibars  
temperature °C Temperature of the water body TEMPPR01 °C  
sound speed m.s-1 Sound velocity in the water body by computation from temperature and salinity by unspecified algorithm SVELCV01 m.s-1  
pitch degrees Orientation (pitch) of measurement platform by triaxial fluxgate compass PTCHFG01 degrees  
roll degrees Orientation (roll angle) of measurement platform by triaxial fluxgate compass ROLLFG01 degrees  
heading degrees True Orientation (horizontal relative to true north) of measurement device HEADCM01 degrees True  

Following reformatting, the data were screened using BODC in-house visualisation software, EDSERPLO.

Originator's Data Processing

Sampling strategy

A cluster of 9 moorings were deployed in the vicinity of the Porcupine Abyssal Plain Observatory. Each mooring contained between 5 and 13 Nortek Aquadopp single-point current meters.

Data Processing

The originator carried out the following processing:

  • Data were converted from .aqd files to Matlab files using Nortek "bin2mat" software
  • One Matlab file was created per mooring.
  • The positions of the deployments were taken from the cruise report and added to the Matlab files.
  • The files were truncated to cut off the deployment and recovery times of the mooring. These were identified by changes in the pressure channel.

The originator also created raw and gridded versions of the files, which are available on request.


Project Information

Ocean Surface Mixing, Ocean Sub-mesoscale Interaction Study (OSMOSIS)

Background

The Ocean Surface Mixing, Ocean Sub-mesoscale Interaction Study (OSMOSIS) consortium was funded to deliver NERC's Ocean Surface Boundary Layer (OSBL) programme. Commencing in 2011, this multiple year study will combine traditional observational techniques, such as moorings and CTDs, with the latest autonomous sampling technologies (including ocean gliders), capable of delivering near real-time scientific measurements through the water column.

The OSMOSIS consortium aims to improve understanding of the OSBL, the interface between the atmosphere and the deeper ocean. This layer of the water column is thought to play a pivotal role in global climate and the productivity of our oceans.

OSMOSIS involves collaborations between scientists at various universities (Reading, Oxford, Bangor, Southampton and East Anglia) together with researchers at the National Oceanography Centre (NOC), Scottish Association for Marine Science (SAMS) and Plymouth Marine Laboratory (PML). In addition, there are a number of project partners linked to the consortium.

Scientific Objectives

  • The primary goal of the fieldwork component of OSMOSIS is to obtain a year-long time series of the properties of the OSBL and its controlling 3D physical processes. This is achieved with an array of moorings (two nested clusters of 4 moorings, each centred around a central mooring) and gliders deployed near the Porcupine Abyssal Plain (PAP) observatory. Data obtained from this campaign will help with the understanding of these processes and subsequent development of associated parameterisations.
  • OSMOSIS will attempt to create parameterisations for the processes which determine the evolving stratification and potential vorticity budgets of the OSBL.
  • The overall legacy of OSMOSIS will be to develop new (physically based and observationally supported) parameterisations of processes that deepen and shoal the OSBL, and to implement and evaluate these parameterisations in a state-of-the-art global coupled climate model, facilitating improved weather and climate predictions.

Fieldwork

Three cruises are directly associated with the OSMOSIS consortium. Preliminary exploratory work in the Clyde Sea (September 2011) to hone techniques and strategies, followed by a mooring deployment and recovery cruise in the vicinity of the Porcupine Abyssal Plain (PAP) observatory (in late Summer 2012 and 2013 respectively). Additional opportunist ship time being factored in to support the ambitious glider operations associated with OSMOSIS.

Instrumentation

Types of instrumentation and measurements associated with the OSMOSIS observational campaign:

  • Ocean gliders
  • Wave rider buoys
  • Towed SeaSoar surveys
  • Microshear measurements
  • Moored current meters, conductivity-temperature sensors and ADCPs
  • Traditional shipboard measurements (including CTD, underway, discrete nutrients, LADCP, ADCP).

Contacts

Collaborator Organisation
Prof. Stephen Belcher University of Reading, U.K
Dr. Alberto C Naveira Garabato University of Southampton, U.K

Data Activity or Cruise Information

Data Activity

Start Date (yyyy-mm-dd) 2012-09-03
End Date (yyyy-mm-dd) 2013-09-06
Organization Undertaking ActivityUniversity of Southampton School of Ocean and Earth Science
Country of OrganizationUnited Kingdom
Originator's Data Activity IdentifierOSMOSIS NW inner
Platform Categorysubsurface mooring

OSMOSIS north-west inner mooring

The short term moorings were deployed and recovered during cruise RRS Discovery D381A as part of the Ocean Surface Mixing, Ocean Submesoscale Interaction Study (OSMOSIS) project.

The target for the inner north-west mooring was 48° 42.000' N, 16° 12.360' W in approximately 4,830 m of water. The mooring consisted of 50 Star-Oddi thermistors, one upward pointing 75 kHz ADCP, seven Nortek single-point current meters and seven SBE 37 MicroCAT sensors. In addition, a light and Argo tag were fixed at the top of the mooring.

Instruments deployed on the mooring

Instrument and equipment Instrument serial number Depth relative to surface
Thermistor T4215 33
Light W06-005 36
ARGO tag A02-018 36
Thermistor T4216 47
Nortek CM 8352 53
Thermistor T4217 54
SBE 37 MicroCAT 9376 54
Thermistor T4220 59
Thermistor T4221 64
Thermistor T4222 69
Thermistor T4223 74
Thermistor T4224 79
Thermistor T4225 84
Thermistor T4226 89
Thermistor T4227 94
Thermistor T4228 99
Nortek CM 8355 110
Thermistor T4229 110
SBE 37 MicroCAT 9377 111
Thermistor T4230 115
Thermistor T4231 120
Thermistor T4232 125
Thermistor T4233 130
Thermistor T4234 135
Thermistor T4235 140
Thermistor T4236 145
Thermistor T4237 150
Nortek CM 8360 159
SBE 37 MicroCAT 9378 160
Thermistor T4238 162
Thermistor T4239 171
Thermistor T4240 180
Thermistor T4241 189
Thermistor T4369 198
Thermistor T4371 207
Thermistor T4372 216
Nortek CM 8362 228
Thermistor T4382 228
SBE 37 MicroCAT 9379 229
Thermistor T4383 234
Thermistor T4384 244
Thermistor T4385 254
Thermistor T4386 264
Thermistor T4387 274
Thermistor T4388 284
Thermistor T4389 293
Nortek CM 8364 298
SBE 37 MicroCAT 9380 299
Thermistor T4390 305
Thermistor T4391 319
Thermistor T4392 334
Thermistor T4393 348
Nortek CM 8365 352
SBE 37 MicroCAT 7312 353
Thermistor T4394 363
Thermistor T4395 378
Thermistor T4396 393
Thermistor T4397 408
Thermistor T4398 423
Thermistor T4399 438
75 kHz ADCP LR10584 452
Thermistor T4400 453
Thermistor T4401 465
Thermistor T4402 480
Thermistor T4403 495
Nortek CM 9822 513
SBE 37 MicroCAT 7313 514
Release 1136/1492 4816

Related Data Activity activities are detailed in Appendix 1

Cruise

Cruise Name D381A
Departure Date 2012-08-28
Arrival Date 2012-09-13
Principal Scientist(s)Alberto C Naveira Garabato (University of Southampton School of Ocean and Earth Science)
Ship RRS Discovery

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
Q value below limit of quantification

Appendix 1: OSMOSIS NW inner

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.

Series IdentifierData CategoryStart date/timeStart positionCruise
1742886Currents -subsurface Eulerian2012-09-03 13:00:0048.7 N, 16.206 WRRS Discovery D381A
1742898Currents -subsurface Eulerian2012-09-03 13:00:0048.7 N, 16.206 WRRS Discovery D381A
1742905Currents -subsurface Eulerian2012-09-03 13:00:0048.7 N, 16.206 WRRS Discovery D381A
1742929Currents -subsurface Eulerian2012-09-03 13:00:0048.7 N, 16.206 WRRS Discovery D381A
1742930Currents -subsurface Eulerian2012-09-03 13:00:0048.7 N, 16.206 WRRS Discovery D381A
1742942Currents -subsurface Eulerian2012-09-03 13:00:0048.7 N, 16.206 WRRS Discovery D381A
1799648Hydrography time series at depth2012-09-03 13:00:0048.7 N, 16.206 WRRS Discovery D381A
1799661Hydrography time series at depth2012-09-03 13:00:0048.7 N, 16.206 WRRS Discovery D381A
1799673Hydrography time series at depth2012-09-03 13:00:0048.7 N, 16.206 WRRS Discovery D381A
1799685Hydrography time series at depth2012-09-03 13:00:0048.7 N, 16.206 WRRS Discovery D381A
1799697Hydrography time series at depth2012-09-03 13:00:0048.7 N, 16.206 WRRS Discovery D381A
1799704Hydrography time series at depth2012-09-03 13:00:0048.7 N, 16.206 WRRS Discovery D381A
1799716Hydrography time series at depth2012-09-03 13:00:0048.7 N, 16.206 WRRS Discovery D381A
1799728Hydrography time series at depth2012-09-03 13:00:0048.7 N, 16.206 WRRS Discovery D381A
1799741Hydrography time series at depth2012-09-03 13:00:0048.7 N, 16.206 WRRS Discovery D381A
1799753Hydrography time series at depth2012-09-03 13:00:0048.7 N, 16.206 WRRS Discovery D381A
1799765Hydrography time series at depth2012-09-03 13:00:0048.7 N, 16.206 WRRS Discovery D381A
1799777Hydrography time series at depth2012-09-03 13:00:0048.7 N, 16.206 WRRS Discovery D381A
1799789Hydrography time series at depth2012-09-03 13:00:0048.7 N, 16.206 WRRS Discovery D381A
1799790Hydrography time series at depth2012-09-03 13:00:0048.7 N, 16.206 WRRS Discovery D381A
1799808Hydrography time series at depth2012-09-03 13:00:0048.7 N, 16.206 WRRS Discovery D381A
1799821Hydrography time series at depth2012-09-03 13:00:0048.7 N, 16.206 WRRS Discovery D381A
1799833Hydrography time series at depth2012-09-03 13:00:0048.7 N, 16.206 WRRS Discovery D381A
1799845Hydrography time series at depth2012-09-03 13:00:0048.7 N, 16.206 WRRS Discovery D381A
1799857Hydrography time series at depth2012-09-03 13:00:0048.7 N, 16.206 WRRS Discovery D381A
1799869Hydrography time series at depth2012-09-03 13:00:0048.7 N, 16.206 WRRS Discovery D381A
1799870Hydrography time series at depth2012-09-03 13:00:0048.7 N, 16.206 WRRS Discovery D381A
1799882Hydrography time series at depth2012-09-03 13:00:0048.7 N, 16.206 WRRS Discovery D381A
1799894Hydrography time series at depth2012-09-03 13:00:0048.7 N, 16.206 WRRS Discovery D381A
1799901Hydrography time series at depth2012-09-03 13:00:0048.7 N, 16.206 WRRS Discovery D381A
1799913Hydrography time series at depth2012-09-03 13:00:0048.7 N, 16.206 WRRS Discovery D381A
1799925Hydrography time series at depth2012-09-03 13:00:0048.7 N, 16.206 WRRS Discovery D381A
1799937Hydrography time series at depth2012-09-03 13:00:0048.7 N, 16.206 WRRS Discovery D381A
1799949Hydrography time series at depth2012-09-03 13:00:0048.7 N, 16.206 WRRS Discovery D381A
1799950Hydrography time series at depth2012-09-03 13:00:0048.7 N, 16.206 WRRS Discovery D381A
1799962Hydrography time series at depth2012-09-03 13:00:0048.7 N, 16.206 WRRS Discovery D381A
1799974Hydrography time series at depth2012-09-03 13:00:0048.7 N, 16.206 WRRS Discovery D381A
1799986Hydrography time series at depth2012-09-03 13:00:0048.7 N, 16.206 WRRS Discovery D381A
1799998Hydrography time series at depth2012-09-03 13:00:0048.7 N, 16.206 WRRS Discovery D381A
1800006Hydrography time series at depth2012-09-03 13:00:0048.7 N, 16.206 WRRS Discovery D381A
1800018Hydrography time series at depth2012-09-03 13:00:0048.7 N, 16.206 WRRS Discovery D381A
1800031Hydrography time series at depth2012-09-03 13:00:0048.7 N, 16.206 WRRS Discovery D381A
1800043Hydrography time series at depth2012-09-03 13:00:0048.7 N, 16.206 WRRS Discovery D381A
1800055Hydrography time series at depth2012-09-03 13:00:0048.7 N, 16.206 WRRS Discovery D381A
1800067Hydrography time series at depth2012-09-03 13:00:0048.7 N, 16.206 WRRS Discovery D381A
1800079Hydrography time series at depth2012-09-03 13:00:0048.7 N, 16.206 WRRS Discovery D381A
1800080Hydrography time series at depth2012-09-03 13:00:0048.7 N, 16.206 WRRS Discovery D381A
1800092Hydrography time series at depth2012-09-03 13:00:0048.7 N, 16.206 WRRS Discovery D381A
1800111Hydrography time series at depth2012-09-03 13:00:0048.7 N, 16.206 WRRS Discovery D381A
1800123Hydrography time series at depth2012-09-03 13:00:0048.7 N, 16.206 WRRS Discovery D381A
1800135Hydrography time series at depth2012-09-03 13:00:0048.7 N, 16.206 WRRS Discovery D381A
1800147Hydrography time series at depth2012-09-03 13:00:0048.7 N, 16.206 WRRS Discovery D381A
1800159Hydrography time series at depth2012-09-03 13:00:0048.7 N, 16.206 WRRS Discovery D381A
1800160Hydrography time series at depth2012-09-03 13:00:0048.7 N, 16.206 WRRS Discovery D381A
1800172Hydrography time series at depth2012-09-03 13:00:0048.7 N, 16.206 WRRS Discovery D381A
1766458Hydrography time series at depth2012-09-03 13:00:0148.7 N, 16.206 WRRS Discovery D381A
1766471Hydrography time series at depth2012-09-03 13:00:0148.7 N, 16.206 WRRS Discovery D381A
1766483Hydrography time series at depth2012-09-03 13:00:0148.7 N, 16.206 WRRS Discovery D381A
1766495Hydrography time series at depth2012-09-03 13:00:0148.7 N, 16.206 WRRS Discovery D381A
1766502Hydrography time series at depth2012-09-03 13:00:0148.7 N, 16.206 WRRS Discovery D381A
1766514Hydrography time series at depth2012-09-03 13:00:0148.7 N, 16.206 WRRS Discovery D381A
1766526Hydrography time series at depth2012-09-03 13:00:0148.7 N, 16.206 WRRS Discovery D381A