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Metadata Report for BODC Series Reference Number 1742770


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_NE-INNER_056M_SN9853
BODC Series Reference 1742770
 

Time Co-ordinates(UT)

Start Time (yyyy-mm-dd hh:mm) 2012-09-05 12:10
End Time (yyyy-mm-dd hh:mm) 2013-09-05 08:40
Nominal Cycle Interval 600.0 seconds
 

Spatial Co-ordinates

Latitude 48.69400 N ( 48° 41.6' N )
Longitude 16.17300 W ( 16° 10.4' W )
Positional Uncertainty 0.0 to 0.01 n.miles
Minimum Sensor or Sampling Depth 56.0 m
Maximum Sensor or Sampling Depth 56.0 m
Minimum Sensor or Sampling Height 4830.1 m
Maximum Sensor or Sampling Height 4830.1 m
Sea Floor Depth 4886.11 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) 2012-09-05
End Date (yyyy-mm-dd) 2013-09-05
Organization Undertaking ActivityUniversity of Southampton School of Ocean and Earth Science
Country of OrganizationUnited Kingdom
Originator's Data Activity IdentifierOSMOSIS NE inner
Platform Categorysubsurface mooring

OSMOSIS north-east 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 north-east inner (NE-I) mooring was 48° 42.000' N, 16° 10.440' W in approximately 4,830 m of water. The mooring consisted of 50 Star-Oddi thermistors, one upward pointing 75 kHz ADCP, three 600 kHz ADCPs, 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 T4242 32
Light W06-007 35
ARGO tag A02-020 35
Thermistor T4244 46
600 kHz ADCP WHS3644 51
Thermistor T4245 52
Nortek CM 9853 54
SBE 37 MicroCAT 9381 54
Thermistor T4246 59
Thermistor T4247 64
Thermistor T4248 69
Thermistor T4249 74
Thermistor T4251 79
Thermistor T4252 84
Thermistor T4253 89
Thermistor T4254 94
Thermistor T4255 99
600 kHz ADCP WHS3821 108
Thermistor T4256 110
Nortek CM 9854 111
SBE 37 MicroCAT 9382 112
Thermistor T4467 117
Thermistor T4258 122
Thermistor T4259 127
Thermistor T4260 132
Thermistor T4261 137
Thermistor T4262 142
Thermistor T4263 147
Thermistor T4264 152
Nortek CM 9859 160
SBE 37 MicroCAT 9383 160
Thermistor T4265 163
Thermistor T4266 172
Thermistor T4267 181
Thermistor T4268 190
Thermistor T4404 199
Thermistor T4405 208
Thermistor T4406 217
600 kHz ADCP WHS4015 228
Thermistor T4407 229
Nortek CM 9861 230
SBE 37 MicroCAT 9384 231
Thermistor T4408 236
Thermistor T4411 246
Thermistor T4412 256
Thermistor T4413 266
Thermistor T4414 276
Thermistor T4415 286
Thermistor T4416 295
Nortek CM 9867 299
SBE 37 MicroCAT 9385 299
Thermistor T4418 305
Thermistor T4419 319
Thermistor T4420 334
Thermistor T4421 348
Nortek CM 9868 352
SBE 37 MicroCAT 7316 353
Thermistor T4422 363
Thermistor T4423 378
Thermistor T4424 393
Thermistor T4425 408
Thermistor T4426 423
Thermistor T4427 438
75 kHz ADCP LR17825 452
Thermistor T4428 453
Thermistor T4429 464
Thermistor T4430 479
Thermistor T4432 494
Nortek CM 9874 512
SBE 37 MicroCAT 8075 513
Release 1138/1494 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 NE 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
1742782Currents -subsurface Eulerian2012-09-05 12:10:0048.694 N, 16.173 WRRS Discovery D381A
1742794Currents -subsurface Eulerian2012-09-05 12:10:0048.694 N, 16.173 WRRS Discovery D381A
1742801Currents -subsurface Eulerian2012-09-05 12:10:0048.694 N, 16.173 WRRS Discovery D381A
1742813Currents -subsurface Eulerian2012-09-05 12:10:0048.694 N, 16.173 WRRS Discovery D381A
1742825Currents -subsurface Eulerian2012-09-05 12:10:0048.694 N, 16.173 WRRS Discovery D381A
1742837Currents -subsurface Eulerian2012-09-05 12:10:0048.694 N, 16.173 WRRS Discovery D381A
1799102Hydrography time series at depth2012-09-05 12:10:0048.694 N, 16.173 WRRS Discovery D381A
1799114Hydrography time series at depth2012-09-05 12:10:0048.694 N, 16.173 WRRS Discovery D381A
1799126Hydrography time series at depth2012-09-05 12:10:0048.694 N, 16.173 WRRS Discovery D381A
1799138Hydrography time series at depth2012-09-05 12:10:0048.694 N, 16.173 WRRS Discovery D381A
1799151Hydrography time series at depth2012-09-05 12:10:0048.694 N, 16.173 WRRS Discovery D381A
1799163Hydrography time series at depth2012-09-05 12:10:0048.694 N, 16.173 WRRS Discovery D381A
1799175Hydrography time series at depth2012-09-05 12:10:0048.694 N, 16.173 WRRS Discovery D381A
1799187Hydrography time series at depth2012-09-05 12:10:0048.694 N, 16.173 WRRS Discovery D381A
1799199Hydrography time series at depth2012-09-05 12:10:0048.694 N, 16.173 WRRS Discovery D381A
1799206Hydrography time series at depth2012-09-05 12:10:0048.694 N, 16.173 WRRS Discovery D381A
1799218Hydrography time series at depth2012-09-05 12:10:0048.694 N, 16.173 WRRS Discovery D381A
1799231Hydrography time series at depth2012-09-05 12:10:0048.694 N, 16.173 WRRS Discovery D381A
1799243Hydrography time series at depth2012-09-05 12:10:0048.694 N, 16.173 WRRS Discovery D381A
1799255Hydrography time series at depth2012-09-05 12:10:0048.694 N, 16.173 WRRS Discovery D381A
1799267Hydrography time series at depth2012-09-05 12:10:0048.694 N, 16.173 WRRS Discovery D381A
1799279Hydrography time series at depth2012-09-05 12:10:0048.694 N, 16.173 WRRS Discovery D381A
1799280Hydrography time series at depth2012-09-05 12:10:0048.694 N, 16.173 WRRS Discovery D381A
1799292Hydrography time series at depth2012-09-05 12:10:0048.694 N, 16.173 WRRS Discovery D381A
1799311Hydrography time series at depth2012-09-05 12:10:0048.694 N, 16.173 WRRS Discovery D381A
1799323Hydrography time series at depth2012-09-05 12:10:0048.694 N, 16.173 WRRS Discovery D381A
1799335Hydrography time series at depth2012-09-05 12:10:0048.694 N, 16.173 WRRS Discovery D381A
1799347Hydrography time series at depth2012-09-05 12:10:0048.694 N, 16.173 WRRS Discovery D381A
1799359Hydrography time series at depth2012-09-05 12:10:0048.694 N, 16.173 WRRS Discovery D381A
1799360Hydrography time series at depth2012-09-05 12:10:0048.694 N, 16.173 WRRS Discovery D381A
1799372Hydrography time series at depth2012-09-05 12:10:0048.694 N, 16.173 WRRS Discovery D381A
1799384Hydrography time series at depth2012-09-05 12:10:0048.694 N, 16.173 WRRS Discovery D381A
1799396Hydrography time series at depth2012-09-05 12:10:0048.694 N, 16.173 WRRS Discovery D381A
1799403Hydrography time series at depth2012-09-05 12:10:0048.694 N, 16.173 WRRS Discovery D381A
1799415Hydrography time series at depth2012-09-05 12:10:0048.694 N, 16.173 WRRS Discovery D381A
1799427Hydrography time series at depth2012-09-05 12:10:0048.694 N, 16.173 WRRS Discovery D381A
1799439Hydrography time series at depth2012-09-05 12:10:0048.694 N, 16.173 WRRS Discovery D381A
1799440Hydrography time series at depth2012-09-05 12:10:0048.694 N, 16.173 WRRS Discovery D381A
1799452Hydrography time series at depth2012-09-05 12:10:0048.694 N, 16.173 WRRS Discovery D381A
1799464Hydrography time series at depth2012-09-05 12:10:0048.694 N, 16.173 WRRS Discovery D381A
1799476Hydrography time series at depth2012-09-05 12:10:0048.694 N, 16.173 WRRS Discovery D381A
1799488Hydrography time series at depth2012-09-05 12:10:0048.694 N, 16.173 WRRS Discovery D381A
1799507Hydrography time series at depth2012-09-05 12:10:0048.694 N, 16.173 WRRS Discovery D381A
1799519Hydrography time series at depth2012-09-05 12:10:0048.694 N, 16.173 WRRS Discovery D381A
1799520Hydrography time series at depth2012-09-05 12:10:0048.694 N, 16.173 WRRS Discovery D381A
1799532Hydrography time series at depth2012-09-05 12:10:0048.694 N, 16.173 WRRS Discovery D381A
1799544Hydrography time series at depth2012-09-05 12:10:0048.694 N, 16.173 WRRS Discovery D381A
1799556Hydrography time series at depth2012-09-05 12:10:0048.694 N, 16.173 WRRS Discovery D381A
1799568Hydrography time series at depth2012-09-05 12:10:0048.694 N, 16.173 WRRS Discovery D381A
1799581Hydrography time series at depth2012-09-05 12:10:0048.694 N, 16.173 WRRS Discovery D381A
1799593Hydrography time series at depth2012-09-05 12:10:0048.694 N, 16.173 WRRS Discovery D381A
1799600Hydrography time series at depth2012-09-05 12:10:0048.694 N, 16.173 WRRS Discovery D381A
1799612Hydrography time series at depth2012-09-05 12:10:0048.694 N, 16.173 WRRS Discovery D381A
1799624Hydrography time series at depth2012-09-05 12:10:0048.694 N, 16.173 WRRS Discovery D381A
1799636Hydrography time series at depth2012-09-05 12:10:0048.694 N, 16.173 WRRS Discovery D381A
1766330Hydrography time series at depth2012-09-05 12:10:0148.694 N, 16.173 WRRS Discovery D381A
1766342Hydrography time series at depth2012-09-05 12:10:0148.694 N, 16.173 WRRS Discovery D381A
1766354Hydrography time series at depth2012-09-05 12:10:0148.694 N, 16.173 WRRS Discovery D381A
1766366Hydrography time series at depth2012-09-05 12:10:0148.694 N, 16.173 WRRS Discovery D381A
1766378Hydrography time series at depth2012-09-05 12:10:0148.694 N, 16.173 WRRS Discovery D381A
1766391Hydrography time series at depth2012-09-05 12:10:0148.694 N, 16.173 WRRS Discovery D381A