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Metadata Report for BODC Series Reference Number 248750


Metadata Summary

Data Description

Data Category Currents -subsurface Eulerian
Instrument Type
NameCategories
Interocean S4 current meter  current meters
Instrument Mounting subsurface mooring
Originating Country United Kingdom
Originator -
Originating Organization Institute of Oceanographic Sciences Bidston Laboratory (now National Oceanography Centre, Liverpool)
Processing Status banked
Online delivery of data Download available - Ocean Data View (ODV) format
Project(s) North Sea Project 1987-1992
 

Data Identifiers

Originator's Identifier 1121T/C35FC
BODC Series Reference 248750
 

Time Co-ordinates(UT)

Start Time (yyyy-mm-dd hh:mm) 1988-09-06 06:30
End Time (yyyy-mm-dd hh:mm) 1988-10-02 16:40
Nominal Cycle Interval 600.0 seconds
 

Spatial Co-ordinates

Latitude 52.60830 N ( 52° 36.5' N )
Longitude 3.75330 E ( 3° 45.2' E )
Positional Uncertainty 0.05 to 0.1 n.miles
Minimum Sensor or Sampling Depth 18.0 m
Maximum Sensor or Sampling Depth 18.0 m
Minimum Sensor or Sampling Height 12.0 m
Maximum Sensor or Sampling Height 12.0 m
Sea Floor Depth 30.0 m
Sea Floor Depth Source -
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 Sea floor reference - Depth measured as a height above sea floor but converted into a depth relative to the sea surface according to the same datum as used for sea floor depth (applicable to instrument depths not bathymetric depths)
Sea Floor Depth Datum Instantaneous - Depth measured below water line or instantaneous water body surface
 

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)
LCDAEL011Degrees TrueDirection (towards) of water current (Eulerian measurement) in the water body by in-situ current meter and correction to true North
LCSAEL011Centimetres per secondSpeed of water current (Eulerian measurement) in the water body by in-situ current meter

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

Data Quality Report

A visual inspection between these data, data recorded by other instruments on the same mooring and data recorded during previous/subsequent deployments show good agreement.


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

InterOcean Spherical Solid State Sensor Current Meter S4 series

The S4 family are self-contained current measuring sensors enclosing all necessary solid state electronics for acquiring, processing and outputting data. Data retrieval is accomplished through a serial port without opening the instrument.

The spherical shape of the S4 is a contributing factor in the rejection of the vertical components of water movement and there are no protruding parts or sensor support structures to interfere with the water flow.

The S4 measures the magnitude and direction of the horizontal current motion of the water. Water flows through the electromagnetic field created by the instrument, thereby producing a voltage which is proportional to the magnitude of the water velocity past the sensor. This voltage is then sensed by two pairs of titanium electrodes located symmetrically on the equator of the spherical housing which forms the sensor.

Manufacturer's specifications: Meter (sphere, diameter 25cm) is designed for depths down to 1000m (S4 standard: glass-filled cycloaliphalic epoxy construction with grooved surface for hydrodynamic stability) or down to 6000m (S4D, deep: annealed borosilicate glass version with smooth surface). The meter is shackled directly into the mooring cable by means of an axial titanium load bearing shaft.

Meter comprises:-

  1. Electromagnetic, 2 axis current speed sensor, range 0 to 350cm/s (standard) 0 to 50 and 0 to 100cm/s (optional), resolution 0.2cm/s (standard) 0.03cm/s (0 to 50 range) 0.06cm/s (0 to 100 range), accuracy 2 per cent reading +/- 1cm/s. The sensor responds to the component of flow normal to its vertical axis.

  2. Flux-gate magnetometer compass for heading information used to reference the current direction to magnetic north, compass range 360°, resolution 0.5°, accuracy 2°, tilt +/- 25° for specified accuracy.

  3. Temperature stable quartz oscillator clock, accuracy 12 minutes/year.

  4. Optional automatic tilt compensation i.e. the allowable tilt of the meter from the vertical at which the vertical cosine response is fully corrected, angle range +/- 45°, resolution 0.6°, accuracy (speed correction) 1 per cent (angle output) 0.25°.

  5. Optional semiconductor (thermistor or platinum) temperature sensor, range -5 to +45 °C, resolution 0.05 °C, accuracy 0.2 °C, response time at 63 per cent 1 min (1.5 sec thermistor or 60msec platinum).

  6. Optional conductive conductivity sensor, range 5 to 70mS/cm, resolution 0.1mS/cm, accuracy 0.2mS/cm (optional inductive sensor, range 1 to 70mS/cm).

  7. Optional semiconductor strain gauge pressure sensor, range 0 to 1000dBar (70M option), resolution 1dBar (4mm with 70M option), accuracy 0.25 per cent fs.

  8. Recorder, CMOS static RAM microprocessor, 64KByte (128K or 256KByte optional) performs vector averaging, burst sampling and adaptive sampling.

Available versions of the S4 are listed in the table below:

S4RT Basic S4 current meter without memory installed, for real-time monitoring applications only.
S4 The basic S4 current measuring instrument, with current speed and direction sensors and internal memory from 64K to 1 megabyte of solid-state memory.
S4DW S4 current meter directional wave measuring instrument. Includes 1 megabyte of memory, 70 meter high-resolution depth, adaptive sampling, and Lithium battery pack, standard.
S4P S4 instrument outfitted for profiling applications. Fitted with fast response Platinum temperature sensor, inductive flow- through conductivity sensor, and high-resolution depth sensor as standard. Memory size may be from 64K to 1 megabyte.
S4D Deep water S4 instrument for use to depths of 6,000 meters.
S4A Advanced current measuring instrument with large memory capacity, and dual-mode logging capability. Memory size may be 32-256 megabytes. Includes high speed binary down-loads using Zmodem protocol with 32 bit CRC error checking. Adaptive current sampling is standard on this instrument.
S4ADW Large memory capacity S4 directional wave measuring instrument. Includes 32 to 256 megabyte memory, 70 meter high-resolution depth sensor, and Lithium battery pack, standard.
S4ADW-i New generation of S4ADW directional wave measuring instrument providing internally-processed directional wave data for direct output from the instrument without the need for external analysis software. Ideal multi-purpose oceanographic instrument for integrated-system applications requiring pre-processed output directly into a datalogger, PLC, modem, or other external device without need for PC computer. Used for directional wave, current, and tide measurements, with additional parameters available. Includes long-life lithium battery, and internal memory sizes from 32MB to 256MB.
S4AP An S4A instrument outfitted for profiling applications. Fitted with fast response Platinum temperature sensor, inductive flow-through conductivity sensor, and high- resolution depth sensor, standard. Memory size may be 32-256 megabytes.
S4AD Deep water S4A instrument for use to depths of 6,000 meters. Has all the same features and options as available with the standard S4A.
S4AH Same as S4A but uses 5 Hz sampling rate instead of 2 Hz. S4AHDW, S4AHP, S4AHD are 5 Hz models of the units listed above.

Further details are available from the manufacturer's specification sheet.

BODC Current Meter Screening

BODC screen both the series header qualifying information and the parameter values in the data cycles themselves.

Header information is inspected for:

  • Irregularities such as unfeasible values
  • Inconsistencies between related information. For example:
    • Depths of meter and sea bed.
    • Times for mooring deployment and for start/end of data series.
    • Length of record or number of data cycles, the cycle interval, the clock error and the period over which accrued.
    • Parameters stated as measured and the parameters actually present in the data cycles.
  • Originator's comments on meter/mooring performance and data quality.

Documents are written by BODC highlighting irregularities which cannot be resolved.

Data cycles are inspected using time series plots of all parameters. Currents are additionally inspected using vector scatter plots and time series plots of North and East velocity components. These presentations undergo intrinsic and extrinsic screening to detect infeasible values within the data cycles themselves and inconsistencies as seen when comparing characteristics of adjacent data sets displaced with respect to depth, position or time. Values suspected of being of non- oceanographic origin may be tagged with the BODC flag denoting suspect value.

The following types of irregularity, each relying on visual detection in the time series plot, are amongst those which may be flagged as suspect:

  • Spurious data at the start or end of the record.
  • Obvious spikes occurring in periods free from meteorological disturbance.
  • A sequence of constant values in consecutive data cycles.

If a large percentage of the data is affected by irregularities, deemed abnormal, then instead of flagging the individual suspect values, a caution may be documented. Likewise documents will highlight irregularities seen in the current vector scatter plots such as incongruous centre holes, evidence of mooring 'knock-down', abnormal asymmetry in tidally dominated records or gaps as when a range of speeds or directions go unregistered due to meter malfunction.

The term 'knock-down' refers to the situation when the 'drag' exerted on a mooring at high current speeds may cause instruments to tilt beyond the angle at which they are intended to operate. At this point the efficiency of the current sensors to accurately record the flow is reduced.

Inconsistencies between the characteristics of the data set and those of its neighbours are sought, and where necessary, documented. This covers inconsistencies in the following:

  • Maximum and minimum values of parameters (spikes excluded).
  • The orientation and symmetry of the current vector scatter plot.
  • The direction of rotation of the current vectors.
  • The approximate amplitude and periodicity of the tidal currents.
  • The occurrence of meteorological events and, finally, for series for which no time check was possible, the phase.

This intrinsic and extrinsic screening of the parameter values seeks to confirm the qualifying information and the source laboratory's comments on the series. In screening and collating information, every care is taken to ensure that errors of BODC making are not introduced.


Project Information

North Sea Project

The North Sea Project (NSP) was the first Marine Sciences Community Research project of the Natural Environment Research Council (NERC). It evolved from a NERC review of shelf sea research, which identified the need for a concerted multidisciplinary study of circulation, transport and production.

The ultimate aim of the NERC North Sea Project was the development of a suite of prognostic water quality models to aid management of the North Sea. To progress towards water quality models, three intermediate objectives were pursued in parallel:

  • Production of a 3-D transport model for any conservative passive constituent, incorporating improved representations of the necessary physics - hydrodynamics and dispersion;
  • Identifying and quantifying non-conservative processes - sources and sinks determining the cycling and fate of individual constituents;
  • Defining a complete seasonal cycle as a database for all the observational studies needed to formulate, drive and test models.

Proudman Oceanographic Laboratory hosted the project, which involved over 200 scientists and support staff from NERC and other Government funded laboratories, as well as seven universities and polytechnics.

The project ran from 1987 to 1992, with marine field data collection between April 1988 and October 1989. One shakedown (CH28) and fifteen survey cruises (Table 1), each lasting 12 days and following the same track, were repeated monthly. The track selected covered the summer-stratified waters of the north and the homogeneous waters in the Southern Bight in about equal lengths together with their separating frontal band from Flamborough head to Dogger Bank, the Friesian Islands and the German Bight. Mooring stations were maintained at six sites for the duration of the project.

Table 1: Details of NSP Survey Cruises on RRS Challenger
Cruise No. Date
CH28 29/04/88 - 15/05/88
CH33 04/08/88 - 16/08/88
CH35 03/09/88 - 15/09/88
CH37 02/10/88 - 14/10/88
CH39 01/11/88 - 13/11/88
CH41 01/12/88 - 13/12/88
CH43 30/12/88 - 12/01/89
CH45 28/01/89 - 10/02/89
CH47 27/02/89 - 12/03/89
CH49 29/03/89 - 10/04/89
CH51 27/04/89 - 09/05/89
CH53 26/05/89 - 07/06/89
CH55 24/06/89 - 07/07/89
CH57 24/07/89 - 06/08/89
CH59 23/08/89 - 04/09/89
CH61 21/09/89 - 03/10/89

Alternating with the survey cruises were process study cruises (Table 2), which investigated some particular aspect of the science of the North Sea. These included fronts (nearshore, circulation and mixing), sandwaves and sandbanks, plumes (Humber, Wash, Thames and Rhine), resuspension, air-sea exchange, primary productivity and blooms/chemistry.

Table 2: Details of NSP Process cruises on RRS Challenger
Cruise No. Date Process
CH34 18/08/88 - 01/09/88 Fronts - nearshore
CH36 16/09/88 - 30/09/88 Fronts - mixing
CH56 08/07/89 - 22/07/89 Fronts - circulation
CH58 07/08/89 - 21/08/89 Fronts - mixing
CH38 24/10/88 - 31/10/88 Sandwaves
CH40 15/11/88 - 29/11/88 Sandbanks
CH42 15/12/88 - 29/12/88 Plumes/Sandbanks
CH46 12/02/89 - 26/02/89 Plumes/Sandwaves
CH44 13/01/89 - 27/01/89 Resuspension
CH52 11/05/89 - 24/05/89 Resuspension
CH60 06/09/89 - 19/09/89 Resuspension
CH48 13/03/89 - 27/03/89 Air/sea exchanges
CH62 05/10/89 - 19/10/89 Air/sea exchanges
CH50 12/04/89 - 25/04/89 Blooms/chemistry
CH54 09/06/89 - 22/06/89 Production

In addition to the main data collection period, a series of cruises took place between October 1989 and October 1990 that followed up work done on previous cruises (Table 3). Process studies relating to blooms, plumes (Humber, Wash and Rhine), sandwaves and the flux of contaminants through the Dover Strait were carried out as well as two `survey' cruises.

Table 3: Details of NSP `Follow up' cruises on RRS Challenger
Cruise No. Date Process
CH62A 23/10/89 - 03/11/89 Blooms
CH64 03/04/90 - 03/05/90 Blooms
CH65 06/05/90 - 17/05/90 Humber plume
CH66A 20/05/90 - 31/05/90 Survey
CH66B 03/06/90 - 18/06/90 Contaminants through Dover Strait
CH69 26/07/90 - 07/08/90 Resuspension/Plumes
CH72A 20/09/90 - 02/10/90 Survey
CH72B 04/10/90 - 06/10/90 Sandwaves/STABLE
CH72C 06/10/90 - 19/10/90 Rhine plume

The data collected during the observational phase of the North Sea Project comprised one of the most detailed sets of observations ever undertaken in any shallow shelf sea at that time.


Data Activity or Cruise Information

Data Activity

Start Date (yyyy-mm-dd) 1988-09-06
End Date (yyyy-mm-dd) 1988-10-02
Organization Undertaking ActivityInstitute of Oceanographic Sciences Bidston Laboratory (now National Oceanography Centre, Liverpool)
Country of OrganizationUnited Kingdom
Originator's Data Activity IdentifierRIG#C35FC
Platform Categorysubsurface mooring

North Sea Project POLRIG#C35FC

Deployment

This rig was deployed as part of the North Sea Project Survey at Site F.

Rig Position 52° 36.50'N, 003° 45.20'E
Water Depth 30.0

Rig Description

The U-shaped mooring consisted of one InterOcean System Model S4 current meter and one Aanderaa RCM7 current meter. A spar marker buoy was attached to the anchor, a ground line attached the anchor to a further anchor and this was attached to a sub-surface (0.8m diameter steel sphere) buoy. The two current meters were attached to this line.

Instrument Meter Height Parameters Measured
S4 1121 12.0 Current Speed and Direction
Aanderaa 9348 7.0 Current Speed and Direction, Temperature, Pressure and Conductivity

The Aanderaa pressure sensor was not of tide gauge quality, it was used to give an indication of mooring stability.

Related Data Activity activities are detailed in Appendix 1


Fixed Station Information

Fixed Station Information

Station NameNSP Survey F and CTD Site AE
CategoryOffshore area
Latitude52° 37.00' N
Longitude3° 46.00' E
Water depth below MSL30.0 m

North Sea Project Survey Mooring Site F and CTD Site AE

Site F was one of six fixed stations where moorings were deployed during the North Sea Project survey. This location is also one of 123 North Sea Project CTD Sites.

The site was situated in a region of strong tidal currents, up to a maximum of 1.0 m/s and in relatively shallow (30 m) water. These factors produced well mixed conditions through the water column, throughout the year.

The rigs deployed here line within a box bounded by co-ordinates 52° 36.50'N, 003° 45.20'E at the southwest corner and 52° 37.10'N, 003° 46.14'E at the northeast corner. The magnetic variation at this site was 3.1°W.

The deployment history is summarised below:

Rig ID Meter
Type
Meter
Height
(m)
Start
Date
Data
Return
(Days)
Comments
C33FC CM (S4) 12.0 05/08/88 30.6 Good data
CM
(Aanderaa)
7.0
C35FC CM (S4) 12.7 06/09/88 26.4 Good data
CM
(Aanderaa)
7.0
C37FC CM (S4) 12.0 04/10/88 28.6 Good data
CM
(Aanderaa)
7.0
C39FC CM (S4) 12.0 20/11/88 29.8 Good data
CM
(Aanderaa)
7.0
C43FC CM (S4) 12.0 07/01/89 22.0 Good data
CM
(Aanderaa)
7.0 9.6 Short record
C51FC CM (S4) 12.0 28/04/89 0.0 No data recorded
CM
(Aanderaa)
7.0 0.7 Velocity record short, rotor fouled by fishing line
29.6 Good data for Temperature, Conductivity and Pressure
C53FC CM (S4) 12.0 29/05/89 27.1 Good data
CM
(Aanderaa)
7.0
C55FC CM (S4) 12.0 25/06/89 0.0 Data corrupt
CM
(Aanderaa)
7.0 30.1 Good data
C57FC CM (S4) 12.0 27/07/89 28.2 Good data
CM
(Aanderaa)
7.0
C59FC CM (S4) 12.0 25/08/89 27.3 Good data
CM
(Aanderaa)
7.0

Related Fixed Station activities are detailed in Appendix 2


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: RIG#C35FC

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
592047Currents -subsurface Eulerian1988-09-06 06:27:0052.6083 N, 3.7533 ENot applicable

Appendix 2: NSP Survey F and CTD Site AE

Related series for this Fixed Station 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
782725CTD or STD cast1988-05-09 00:21:0053.51767 N, 0.68333 ERRS Challenger CH28
768977CTD or STD cast1988-08-05 06:33:0052.6215 N, 3.76883 ERRS Challenger CH33
248590Currents -subsurface Eulerian1988-08-05 14:10:0052.6117 N, 3.7533 ENot applicable
591959Currents -subsurface Eulerian1988-08-05 14:11:0052.6117 N, 3.7533 ENot applicable
769169CTD or STD cast1988-08-07 08:30:0052.622 N, 3.77583 ERRS Challenger CH33
783010CTD or STD cast1988-09-04 02:17:0052.61267 N, 3.7635 ERRS Challenger CH35
783243CTD or STD cast1988-09-06 01:01:0052.62033 N, 3.76667 ERRS Challenger CH35
592047Currents -subsurface Eulerian1988-09-06 06:27:0052.6083 N, 3.7533 ENot applicable
784246CTD or STD cast1988-10-02 17:55:0052.62133 N, 3.76167 ERRS Challenger CH37
784467CTD or STD cast1988-10-04 20:20:0052.6175 N, 3.76617 ERRS Challenger CH37
248762Currents -subsurface Eulerian1988-10-04 21:00:0052.6155 N, 3.7687 ENot applicable
592035Currents -subsurface Eulerian1988-10-04 21:00:0052.6155 N, 3.7687 ENot applicable
821271CTD or STD cast1988-11-02 03:35:0052.615 N, 3.759 ERRS Challenger CH39
248608Currents -subsurface Eulerian1988-11-02 12:40:0052.617 N, 3.7657 ENot applicable
592023Currents -subsurface Eulerian1988-11-02 12:40:0052.617 N, 3.7657 ENot applicable
821480CTD or STD cast1988-11-04 02:58:0052.60867 N, 3.7605 ERRS Challenger CH39
785680CTD or STD cast1988-12-02 08:39:0052.6195 N, 3.76783 ERRS Challenger CH41
785145CTD or STD cast1988-12-04 08:56:0052.6155 N, 3.7705 ERRS Challenger CH41
786357CTD or STD cast1989-01-04 21:01:0052.6145 N, 3.76783 ERRS Challenger CH43
786554CTD or STD cast1989-01-07 08:30:0052.61533 N, 3.7625 ERRS Challenger CH43
248621Currents -subsurface Eulerian1989-01-07 09:15:0052.6183 N, 3.7583 ENot applicable
591972Currents -subsurface Eulerian1989-01-07 09:15:0052.6183 N, 3.7583 ENot applicable
791034CTD or STD cast1989-01-29 05:21:0052.6165 N, 3.76833 ERRS Challenger CH45
1859395Water sample data1989-01-29 05:26:0052.61658 N, 3.76834 ERRS Challenger CH45
791046CTD or STD cast1989-01-29 05:44:0052.61933 N, 3.775 ERRS Challenger CH45
1859402Water sample data1989-01-29 05:46:0052.61925 N, 3.775 ERRS Challenger CH45
791255CTD or STD cast1989-01-31 09:29:0052.61533 N, 3.76417 ERRS Challenger CH45
1859611Water sample data1989-01-31 09:32:0052.61537 N, 3.76422 ERRS Challenger CH45
792246CTD or STD cast1989-02-28 01:52:0052.613 N, 3.765 ERRS Challenger CH47
792479CTD or STD cast1989-03-02 03:33:0052.61517 N, 3.75883 ERRS Challenger CH47
1857339Water sample data1989-03-02 03:36:0052.61519 N, 3.7589 ERRS Challenger CH47
793772CTD or STD cast1989-03-30 03:52:0052.61333 N, 3.7665 ERRS Challenger CH49
1858459Water sample data1989-03-30 03:57:0052.61336 N, 3.7665 ERRS Challenger CH49
793993CTD or STD cast1989-04-01 04:44:0052.614 N, 3.76267 ERRS Challenger CH49
1858668Water sample data1989-04-01 04:48:0052.61395 N, 3.76264 ERRS Challenger CH49
794714CTD or STD cast1989-04-28 09:49:0052.61967 N, 3.77083 ERRS Challenger CH51
592011Currents -subsurface Eulerian1989-04-28 10:50:0052.617 N, 3.7665 ENot applicable
794935CTD or STD cast1989-04-30 09:16:0052.62567 N, 3.77067 ERRS Challenger CH51
1860789Water sample data1989-04-30 09:22:0052.62575 N, 3.77065 ERRS Challenger CH51
796002CTD or STD cast1989-05-27 04:50:0052.61317 N, 3.76517 ERRS Challenger CH53
1863032Water sample data1989-05-27 04:53:0052.61322 N, 3.76522 ERRS Challenger CH53
796014CTD or STD cast1989-05-27 05:45:0052.61933 N, 3.77433 ERRS Challenger CH53
1863044Water sample data1989-05-27 05:48:0052.61935 N, 3.77433 ERRS Challenger CH53
796247CTD or STD cast1989-05-29 04:03:0052.61717 N, 3.7645 ERRS Challenger CH53
1863277Water sample data1989-05-29 04:08:0052.61719 N, 3.76454 ERRS Challenger CH53
248737Currents -subsurface Eulerian1989-05-29 05:10:0052.6157 N, 3.769 ENot applicable
591996Currents -subsurface Eulerian1989-05-29 05:10:0052.6157 N, 3.769 ENot applicable
797343CTD or STD cast1989-06-25 01:30:0052.61217 N, 3.77383 ERRS Challenger CH55
1656310Water sample data1989-06-25 01:33:0052.61211 N, 3.77385 ERRS Challenger CH55
1865548Water sample data1989-06-25 01:33:0052.61211 N, 3.77385 ERRS Challenger CH55
797380CTD or STD cast1989-06-25 08:30:0052.6155 N, 3.76967 ERRS Challenger CH55
1656358Water sample data1989-06-25 08:35:0052.61548 N, 3.76965 ERRS Challenger CH55
1865597Water sample data1989-06-25 08:35:0052.61548 N, 3.76965 ERRS Challenger CH55
591984Currents -subsurface Eulerian1989-06-25 09:10:0052.6147 N, 3.7658 ENot applicable
797552CTD or STD cast1989-06-26 23:38:0052.61733 N, 3.76333 ERRS Challenger CH55
1656543Water sample data1989-06-26 23:42:0052.61734 N, 3.7634 ERRS Challenger CH55
1865770Water sample data1989-06-26 23:42:0052.61734 N, 3.7634 ERRS Challenger CH55
798703CTD or STD cast1989-07-25 03:45:0052.61683 N, 3.76783 ERRS Challenger CH57
1245577Water sample data1989-07-25 03:47:0052.61676 N, 3.76788 ERRS Challenger CH57
1709035Water sample data1989-07-25 03:47:0052.61676 N, 3.76788 ERRS Challenger CH57
1864361Water sample data1989-07-25 03:47:0052.61676 N, 3.76788 ERRS Challenger CH57
248798Currents -subsurface Eulerian1989-07-27 05:10:0052.6167 N, 3.7658 ENot applicable
591960Currents -subsurface Eulerian1989-07-27 05:10:0052.6167 N, 3.7658 ENot applicable
798912CTD or STD cast1989-07-27 05:24:0052.61717 N, 3.77583 ERRS Challenger CH57
1245774Water sample data1989-07-27 05:26:0052.6171 N, 3.77581 ERRS Challenger CH57
1709232Water sample data1989-07-27 05:26:0052.6171 N, 3.77581 ERRS Challenger CH57
1864570Water sample data1989-07-27 05:26:0052.6171 N, 3.77581 ERRS Challenger CH57
801245CTD or STD cast1989-08-24 02:44:0052.6155 N, 3.75367 ERRS Challenger CH59
1855935Water sample data1989-08-24 02:48:0052.61552 N, 3.75363 ERRS Challenger CH59
801282CTD or STD cast1989-08-24 08:42:0052.61667 N, 3.78933 ERRS Challenger CH59
1855972Water sample data1989-08-24 08:44:0052.61665 N, 3.7894 ERRS Challenger CH59
801429CTD or STD cast1989-08-25 23:20:0052.618 N, 3.7665 ERRS Challenger CH59
1856127Water sample data1989-08-25 23:23:0052.61803 N, 3.7665 ERRS Challenger CH59
248805Currents -subsurface Eulerian1989-08-25 23:45:0052.6147 N, 3.7682 ENot applicable
592059Currents -subsurface Eulerian1989-08-25 23:45:0052.6147 N, 3.7682 ENot applicable
799927CTD or STD cast1989-09-22 08:19:0052.62 N, 3.76617 ERRS Challenger CH61
1854692Water sample data1989-09-22 08:24:0052.62001 N, 3.76616 ERRS Challenger CH61
800101CTD or STD cast1989-09-23 21:23:0052.61817 N, 3.76933 ERRS Challenger CH61
1854864Water sample data1989-09-23 21:27:0052.61823 N, 3.76935 ERRS Challenger CH61
802562CTD or STD cast1990-05-21 11:50:0052.619 N, 3.76633 ERRS Challenger CH66A
802710CTD or STD cast1990-05-23 14:47:0052.61917 N, 3.77133 ERRS Challenger CH66A
827881CTD or STD cast1990-06-16 07:35:0052.63783 N, 3.77633 ERRS Challenger CH66B
804476CTD or STD cast1990-09-22 06:16:0052.61767 N, 3.77133 ERRS Challenger CH72A
804741CTD or STD cast1990-09-25 18:29:0052.62517 N, 3.76583 ERRS Challenger CH72A
829549CTD or STD cast1990-10-14 16:27:0052.6185 N, 3.76233 ERRS Challenger CH72C