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Metadata Report for BODC Series Reference Number 439423


Metadata Summary

Data Description

Data Category Currents -subsurface Eulerian
Instrument Type
NameCategories
SeaTech transmissometer  transmissometers
Aanderaa RCM 7/8 Recording Current Meter  current meters
Instrument Mounting subsurface mooring
Originating Country United Kingdom
Originator -
Originating Organization Proudman Oceanographic Laboratory (now National Oceanography Centre, Liverpool)
Processing Status banked
Online delivery of data Download available - Ocean Data View (ODV) format
Project(s) Land Ocean Interaction Study (LOIS)
LOIS Shelf Edge Study (LOIS - SES)
 

Data Identifiers

Originator's Identifier as09903.765
BODC Series Reference 439423
 

Time Co-ordinates(UT)

Start Time (yyyy-mm-dd hh:mm) 1996-04-19 13:30
End Time (yyyy-mm-dd hh:mm) 1996-05-10 13:30
Nominal Cycle Interval 3600.0 seconds
 

Spatial Co-ordinates

Latitude 56.45500 N ( 56° 27.3' N )
Longitude 9.06430 W ( 9° 3.9' W )
Positional Uncertainty 0.1 to 0.5 n.miles
Minimum Sensor or Sampling Depth 284.0 m
Maximum Sensor or Sampling Depth 284.0 m
Minimum Sensor or Sampling Height 7.0 m
Maximum Sensor or Sampling Height 7.0 m
Sea Floor Depth 291.0 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)
ATTNMR011per metreAttenuation (red light wavelength) per unit length of the water body by 20 or 25cm path length transmissometer
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
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

No Problem Report Found in the Database


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

Aanderaa Recording Current Meter Model 7/8

Manufacturer's specifications: recording unit height 49.5cm (RCM8 52.0cm), diameter 12.8cm, vane size 48.5x50.0cm. Meter is designed for depths down to 2000m (RCM8 6000m). It incorporates a spindle which is shackled to the mooring line. The meter is attached to the spindle through a gimbal mounting which permits a maximum 27° deviation of the spindle from the vertical, the meter still remaining horizontal.

Meter comprises :

  1. Paddle wheel rotor magnetically coupled to an electronic counter

  2. Vane, which aligns instrument with current flow, has a balance weight ensuring static balance and tail fins to ensure dynamic balance in flows up to 250cm/s.

  3. Magnetic compass (needle is clamped to potentiometer ring) - direction recorded with 0.35° resolution, 5° accuracy for speeds 5 to 100cm/s, 7.5° accuracy for remaining speeds within 2.5 to 200cm/s range.

  4. Quartz clock, accuracy better than 2 sec/day within temperature range 0 to 20°C.

  5. Thermistor (temperature sensor), standard range -2.46 to 21.48°C (max on high range 36.04°C), accuracy 0.05°C, resolution 0.1 per cent of range, 63 per cent response time 12sec.

  6. Inductive cell conductivity sensor (optional), range 0 to 70mmho/cm standard resolution 0.1 per cent of range.

  7. Silicon piezoresistive bridge, standard range 0 to 3000 psi (RCM8 to 9000 psi), resolution 0.1% of range.

  8. Self balancing potentiometer which converts the output from each sensor into a 10 bit binary number for storage on magnetic tape.

  9. Associated electronics.

A built-in clock triggers the instrument at preset intervals and up to six channels are sampled in sequence. Channel 1 is a fixed reference reading for control purposes and data identification. Channels 2, 3 and 4 represent measurement of temperature, conductivity and pressure. Channels 5 and 6 represent the VECTOR AVERAGED current speed and direction since the previous triggering of the instrument. The number of rotor revolutions and the direction is sampled every 12 seconds and broken into North and East components. Successive components are added and recorded as speed and direction. For recording intervals longer than 10 minutes, speed and direction are sampled 1/50th of recording interval.

It has become common practice in some laboratories to deploy these meters as temperature and conductivity loggers without current measuring capabilities.

The following link will provide the manufacturer specifications:

Manufacturer specifications

SeaTech Transmissometer

Introduction

The transmissometer is designed to accurately measure the the amount of light transmitted by a modulated Light Emitting Diode (LED) through a fixed-length in-situ water column to a synchronous detector.

Specifications

  • Water path length: 5 cm (for use in turbid waters) to 1 m (for use in clear ocean waters).
  • Beam diameter: 15 mm
  • Transmitted beam collimation: <3 milliradians
  • Receiver acceptance angle (in water): <18 milliradians
  • Light source wavelength: usually (but not exclusively) 660 nm (red light)

Notes

The instrument can be interfaced to Aanderaa RCM7 current meters. This is achieved by fitting the transmissometer in a slot cut into a customized RCM4-type vane.

A red LED (660 nm) is used for general applications looking at water column sediment load. However, green or blue LEDs can be fitted for specilised optics applications. The light source used is identified by the BODC parameter code.

Further details can be found in the manufacturer's Manual.

Aanderaa Current Meter Data Processing

Data Originator's Processing

The following procedures are carried out before the data were supplied to BODC.

Data were downloaded from the instrument logger, and factory calibrations were applied to the current speed channel, and the pressure, conductivity and temperature channels when fitted. Where available, laboratory calibrations of the current direction channels were used; factory formulae were used in their absence. Where no form factor was known for the conductivity sensor, a value of 2.8 was used.

Please note (concerns vector averaged current data): The current data are averaged by the logger over the sampling interval, whereas the pressure, temperature and conductivity data are single point measurements taken at the end of the interval. The data originator has moved the time stamps to the mid-point of the vector averaging sampling interval for all channels without interpolation.

BODC Data Processing and Quality Control

Where pressure sensors were fitted: the data record was compared with the pressure computed from the water depth on deployment and rig geometry. The time series was visually screened for evidence of rig movement (e.g. trawling) and excessive leaning (perhaps due to strong currents).

Where temperature sensors were fitted: the data record was compared with calibrated CTD data taken in the vicinity and checked for agreement within a few tenths of a degree Celsius. Obvious spikes were flagged. Periods of excessively noisy data were noted.

Where conductivity sensors were fitted: salinity (PSS-78) was computed from in-situ temperature and conductivity and a nominal pressure computed from the water depth on deployment and rig geometry. Obvious spikes were flagged.

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.

Data Processing Notes

The transmission readings were converted to attenuance using the following values:

air correction reading = 186.997
blanked path reading = 799.0

SeaTech Transmissometer Data Processing

Deployment/Recovery Procedure

(A. Banaszek/ P.Knight, Proudman Oceanographic Laboratory, Birkenhead)

Prior to deployment, the counts logged by the transmissometer in free air and with the light path blocked were recorded. It was then strapped to the CTD frame, lowered into the water and held at a fixed depth for approximately 20 minutes for intercalibration with the CTD transmissometer.

On recovery the data were downloaded from the instrument logger and supplied to BODC as raw counts.

Post-Cruise Calibration

(Dr. S.E. Jones, University of Wales, Bangor)

The raw transmission counts were compared with fully corrected CTD attenuance data from the intercalibration cast. The air-correction counts reading (ACR) for each deployment was found from inversion of the formula:

Atten = -(1/p) * ln { (counts-BPR) / (ACR - BPR) }

where:

Atten = CTD attenuance (per metre)
p = path length (metres)
counts = datalogger reading (counts)
BPR = blocked path reading (counts)
ACR = air correcion reading (counts)

Air correction reading values for each instrument deployment were passed on to BODC.

BODC Data Processing and Quality Control

The data were then converted from data logger counts to attenuance (per metre) by applying the above calibration formula to each datacycle in the series.

The data were visually screened for evidence of fouling on the optics, leaking power connectors and flat batteries. Obvious spikes and any features believed to be of non-oceanographic origin were flagged suspect.


Project Information

Land Ocean Interaction Study (LOIS)

Introduction

The Land Ocean Interaction Study (LOIS) was a Community Research Project of the Natural Environment Research Council (NERC). The broad aim of LOIS was to gain an understanding of, and an ability to predict, the nature of environmental change in the coastal zone around the UK through an integrated study from the river catchments through to the shelf break.

LOIS was a collaborative, multidisciplinary study undertaken by scientists from NERC research laboratories and Higher Education institutions. The LOIS project was managed from NERC's Plymouth Marine Laboratory.

The project ran for six years from April 1992 until April 1998 with a further modelling and synthesis phase beginning in April 1998 and ending in April 2000.

Project Structure

LOIS consisted of the following components:

  • River-Atmosphere-Coast Study (RACS)
    • RACS(A) - Atmospheric sub-component
    • RACS(C) - Coasts sub-component
    • RACS(R) - Rivers sub-component
    • BIOTA - Terrestrial salt marsh study
  • Land Ocean Evolution Perspective Study (LOEPS)
  • Shelf-Edge Study (SES)
  • North Sea Modelling Study (NORMS)
  • Data Management (DATA)

Marine Fieldwork

Marine field data were collected between September 1993 and September 1997 as part of RACS(C) and SES. The RACS data were collected throughout this period from the estuaries and coastal waters of the UK North Sea coast from Great Yarmouth to the Tweed. The SES data were collected between March 1995 and September 1996 from the Hebridean slope. Both the RACS and SES data sets incorporate a broad spectrum of measurements collected using moored instruments and research vessel surveys.


LOIS Shelf Edge Study (LOIS - SES)

Introduction

SES was a component of the NERC Land Ocean Interaction Study (LOIS) Community Research Programme that made intensive measurements from the shelf break in the region known as the Hebridean Slope from March 1995 to September 1996.

Scientific Rationale

SES was devoted to the study of interactions between the shelf seas and the open ocean. The specific objectives of the project were:

  • To identify the time and space scales of ocean-shelf momentum transmission and to quantify the contributions to ocean-shelf water exchange by physical processes.

  • To estimate fluxes of water, heat and certain dissolved and suspended constituents across a section of the shelf edge with special emphasis on net carbon export from, and nutrient import to, the shelf.

  • To incorporate process understanding into models and test these models by comparison with observations and provide a basis for estimation of fluxes integrated over time and the length of the shelf.

Fieldwork

The SES fieldwork was focussed on a box enclosing two sections across the shelf break at 56.4-56.5 °N and 56.6-56.7 °N. Moored instrument arrays were maintained throughout the experiment at stations with water depths ranging from 140 m to 1500 m, although there were heavy losses due to the intensive fishing activity in the area. The moorings included meteorological buoys, current meters, transmissometers, fluorometers, nutrient analysers (but these never returned any usable data), thermistor chains, colour sensors and sediment traps.

The moorings were serviced by research cruises at approximately three-monthly intervals. In addition to the mooring work this cruises undertook intensive CTD, water bottle and benthic surveys with cruise durations of up to 6 weeks (3 legs of approximately 2 weeks each).

Moored instrument activities associated with SES comprised current measurements in the North Channel in 1993 and the Tiree Passage from 1995-1996. These provided boundary conditions for SES modelling activities.

Additional data were provided through cruises undertaken by the Defence Evaluation and Research Agency (DERA) in a co-operative programme known as SESAME.


Data Activity or Cruise Information

Data Activity

Start Date (yyyy-mm-dd) 1996-04-19
End Date (yyyy-mm-dd) 1996-05-10
Organization Undertaking ActivityProudman Oceanographic Laboratory (now National Oceanography Centre, Liverpool)
Country of OrganizationUnited Kingdom
Originator's Data Activity IdentifierPOLRIG#765
Platform Categorysubsurface mooring

Proudman Oceanographic Laboratory Moored Instrument Rig #765

This rig was deployed as part of the LOIS Shelf-Edge Study at site S300.

Rig position: 56°, 27.30'N 09° 03.86'W
Deployed: 19 Apr 1996 12:33
from RRS Challenger (cruise CH126A)
Recovered: 10 May 1996 14:15
onto RRS Challenger (cruise CH126B)

The instruments were anchored by 1000kg of chain and kept erect by a 48" diameter buoy attached 25m below the sea surface.

Instruments deployed on the rig

Height above
Sea Bed
Instrument
270m Aanderaa current meter (#8240)
269m to 219m 50m thermistor chain (#2336)
202m Aanderaa current meter (#6749)
201m to 151m 50m thermistor chain (#2337)
145m Aanderaa current meter (#11049)
144m to 44m 100m thermistor chain (#2339)
39m Aanderaa current meter (#11219)
7m Aanderaa current meter (#9903)
fitted with SeaTech transmissometer (#101D)

Related Data Activity activities are detailed in Appendix 1

Cruise

Cruise Name CH126A
Departure Date 1996-04-11
Arrival Date 1996-04-26
Principal Scientist(s)Paul Tett (Napier University School of Life Sciences)
Ship RRS Challenger

Complete Cruise Metadata Report is available here


Fixed Station Information

Fixed Station Information

Station NameLOIS(SES) S300
CategoryOffshore location
Latitude56° 27.14' N
Longitude9° 4.00' W
Water depth below MSL300.0 m

LOIS (SES) Mooring and CTD Site S300

Site S300 was a fixed station where moorings were deployed during the Land-Ocean Interaction Study (LOIS) Shelf Edge Study (SES). It was also one of fourteen CTD sites on repeat section S, across the Hebridean Slope, occupied by cruises between March 1995 and September 1996.

Instrument Deployment History

The following tables summarise the instruments deployed at this site for which data may be available.

1995

Mar Apr May Jun Jul Aug Sep Oct Nov Dec
CM a   b b b b c   d d
TChn     a a a a b      
Tr                    
NA                    

1996

Jan Feb Mar Apr May Jun Jul Aug
CM d     e e     f
TChn       c c c c d
Tr       a a a a b
NA       a a a a  

Each different letter in the tables above corresponds to an individual instrument record.

Glossary

  • CM = Current meter (Aanderaa or S4)
  • TChn = Thermistor chain
  • Tr = Transmissometer
  • NA = Nutrient analyser

Note

  1. Transmissometers may have been fitted to some of the current meters.
  2. Other instruments (colour sensors) may have been deployed.
  3. Only periods for which useful data were returned are shown.

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: POLRIG#765

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
442467Hydrography time series at depth1996-04-19 12:30:0056.455 N, 9.0643 WRRS Challenger CH126A
436241Currents -subsurface Eulerian1996-04-19 12:45:0056.455 N, 9.0643 WRRS Challenger CH126A
436289Currents -subsurface Eulerian1996-04-19 12:45:0056.455 N, 9.0643 WRRS Challenger CH126A
439005Currents -subsurface Eulerian1996-04-19 12:45:0056.455 N, 9.0643 WRRS Challenger CH126A
442418Hydrography time series at depth1996-04-19 13:00:0056.455 N, 9.0643 WRRS Challenger CH126A
442455Hydrography time series at depth1996-04-19 13:00:0056.455 N, 9.0643 WRRS Challenger CH126A
436216Currents -subsurface Eulerian1996-04-19 14:15:0056.455 N, 9.0643 WRRS Challenger CH126A

Appendix 2: LOIS(SES) S300

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
436136Currents -subsurface Eulerian1995-03-28 15:35:0056.4742 N, 9.0618 WRRS Charles Darwin CD91B
506074PAR radiance and irradiance1995-05-08 12:11:0056.4547 N, 9.0652 WRRS Charles Darwin CD93A
439656Hydrography time series at depth1995-05-08 12:30:0056.4547 N, 9.0652 WRRS Charles Darwin CD93A
439804Hydrography time series at depth1995-05-09 16:15:0056.4587 N, 9.0627 WRRS Charles Darwin CD93A
439700Hydrography time series at depth1995-05-09 16:30:0056.4587 N, 9.0627 WRRS Charles Darwin CD93A
439724Hydrography time series at depth1995-05-09 16:30:0056.4587 N, 9.0627 WRRS Charles Darwin CD93A
426074Currents -subsurface Eulerian1995-05-09 16:32:3056.4587 N, 9.0627 WRRS Charles Darwin CD93A
431316Currents -subsurface Eulerian1995-05-09 16:45:0056.4587 N, 9.0627 WRRS Charles Darwin CD93A
431341Currents -subsurface Eulerian1995-05-09 16:45:0056.4587 N, 9.0627 WRRS Charles Darwin CD93A
431408Currents -subsurface Eulerian1995-05-09 16:45:0056.4587 N, 9.0627 WRRS Charles Darwin CD93A
439306Currents -subsurface Eulerian1995-05-09 16:45:0056.4587 N, 9.0627 WRRS Charles Darwin CD93A
439331Currents -subsurface Eulerian1995-05-09 16:45:0056.4587 N, 9.0627 WRRS Charles Darwin CD93A
439761Hydrography time series at depth1995-05-09 17:00:0056.4587 N, 9.0627 WRRS Charles Darwin CD93A
390260CTD or STD cast1995-07-27 22:28:0056.4582 N, 9.0683 WRRS Challenger CH120
439712Hydrography time series at depth1995-08-14 14:05:0056.458 N, 9.0632 WRRS Challenger CH121A
431353Currents -subsurface Eulerian1995-08-14 14:07:3056.458 N, 9.0632 WRRS Challenger CH121A
439318Currents -subsurface Eulerian1995-08-14 14:07:3056.458 N, 9.0632 WRRS Challenger CH121A
439343Currents -subsurface Eulerian1995-08-14 14:07:3056.458 N, 9.0632 WRRS Challenger CH121A
431328Currents -subsurface Eulerian1995-08-14 14:10:3056.458 N, 9.0632 WRRS Challenger CH121A
431421Currents -subsurface Eulerian1995-08-14 14:10:3056.458 N, 9.0632 WRRS Challenger CH121A
426086Currents -subsurface Eulerian1995-08-14 14:12:3056.458 N, 9.0632 WRRS Challenger CH121A
439736Hydrography time series at depth1995-08-14 14:25:0056.458 N, 9.0632 WRRS Challenger CH121A
439773Hydrography time series at depth1995-08-14 14:25:0056.458 N, 9.0632 WRRS Challenger CH121A
439816Hydrography time series at depth1995-08-14 14:59:3056.458 N, 9.0632 WRRS Challenger CH121A
431365Currents -subsurface Eulerian1995-09-03 11:15:0056.4588 N, 9.0622 WRRS Challenger CH121C
431433Currents -subsurface Eulerian1995-09-03 11:15:0056.4588 N, 9.0622 WRRS Challenger CH121C
439540Hydrography time series at depth1995-09-03 11:30:0056.4587 N, 9.0622 WRRS Challenger CH121C
439748Hydrography time series at depth1995-09-03 11:30:0056.4587 N, 9.0622 WRRS Challenger CH121C
438905Currents -subsurface Eulerian1995-11-27 07:45:0056.4622 N, 9.0612 WRRS Challenger CH123A
442467Hydrography time series at depth1996-04-19 12:30:0056.455 N, 9.0643 WRRS Challenger CH126A
436241Currents -subsurface Eulerian1996-04-19 12:45:0056.455 N, 9.0643 WRRS Challenger CH126A
436289Currents -subsurface Eulerian1996-04-19 12:45:0056.455 N, 9.0643 WRRS Challenger CH126A
439005Currents -subsurface Eulerian1996-04-19 12:45:0056.455 N, 9.0643 WRRS Challenger CH126A
442418Hydrography time series at depth1996-04-19 13:00:0056.455 N, 9.0643 WRRS Challenger CH126A
442455Hydrography time series at depth1996-04-19 13:00:0056.455 N, 9.0643 WRRS Challenger CH126A
436216Currents -subsurface Eulerian1996-04-19 14:15:0056.455 N, 9.0643 WRRS Challenger CH126A
496188Transmittance/attenuance, turbidity, or SPM conc.1996-04-19 14:42:0056.4615 N, 9.0602 WRRS Challenger CH126A
442572Hydrography time series at depth1996-04-19 15:00:0056.4615 N, 9.0602 WRRS Challenger CH126A
439030Currents -subsurface Eulerian1996-07-11 20:37:3056.4553 N, 9.0648 WRRS Challenger CH128A
439460Currents -subsurface Eulerian1996-07-11 20:37:3056.4553 N, 9.0648 WRRS Challenger CH128A
477295Hydrography time series at depth1996-07-11 20:40:0056.4553 N, 9.0648 WRRS Challenger CH128A
477258Hydrography time series at depth1996-07-11 20:42:0056.4553 N, 9.0648 WRRS Challenger CH128A
477314Hydrography time series at depth1996-07-11 20:42:0056.4553 N, 9.0648 WRRS Challenger CH128A
477363Hydrography time series at depth1996-07-11 20:42:0056.4553 N, 9.0648 WRRS Challenger CH128A
477271Hydrography time series at depth1996-07-11 20:44:0056.4553 N, 9.0648 WRRS Challenger CH128A
477326Hydrography time series at depth1996-07-11 20:44:0056.4553 N, 9.0648 WRRS Challenger CH128A
477338Hydrography time series at depth1996-07-11 20:44:0056.4553 N, 9.0648 WRRS Challenger CH128A
477351Hydrography time series at depth1996-07-11 20:44:0056.4553 N, 9.0648 WRRS Challenger CH128A
477302Hydrography time series at depth1996-07-11 20:46:0056.4553 N, 9.0648 WRRS Challenger CH128A
477283Hydrography time series at depth1996-07-11 20:50:0056.4553 N, 9.0648 WRRS Challenger CH128A
442615Hydrography time series at depth1996-07-11 20:50:0356.4553 N, 9.0648 WRRS Challenger CH128A
442627Hydrography time series at depth1996-07-11 20:50:0356.4553 N, 9.0648 WRRS Challenger CH128A
438886Currents -subsurface Eulerian1996-07-11 21:02:3056.4553 N, 9.0648 WRRS Challenger CH128A
442603Hydrography time series at depth1996-07-11 21:10:0356.4553 N, 9.0648 WRRS Challenger CH128A
438898Currents -subsurface Eulerian1996-07-11 21:32:3056.4553 N, 9.0648 WRRS Challenger CH128A
438954Currents -subsurface Eulerian1996-07-11 21:32:3056.4553 N, 9.0648 WRRS Challenger CH128A