Metadata Report for BODC Series Reference Number 582194


Metadata Summary

Data Description

Data Category Bathymetry
Instrument Type Single-beam echosounder
Instrument Mounting research vessel
Originating Country United Kingdom
Originator -
Originating Organization Plymouth Marine Laboratory
Processing Status banked
Project(s) WOCE
 

Data Identifiers

Originator's Identifier CD682/1992
BODC Series Reference 582194
 

Time Co-ordinates(UT)

Start Time (yyyy-mm-dd hh:mm) 1992-05-09 13:24
End Time (yyyy-mm-dd hh:mm) 1992-05-31 09:52
Nominal Cycle Interval 120.0 seconds
 

Spatial Co-ordinates

Southernmost Latitude 24.96870 N ( 24° 58.1' N )
Northernmost Latitude 27.33230 N ( 27° 19.9' N )
Westernmost Longitude 29.00210 W ( 29° 0.1' W )
Easternmost Longitude 18.12940 W ( 18° 7.8' W )
Positional Uncertainty Unspecified
Minimum Sensor Depth -
Maximum Sensor Depth -
Minimum Sensor Height -
Maximum Sensor Height -
Sea Floor Depth -
Sensor Distribution -
Sensor Depth Datum -
Sea Floor Depth Datum -
 

Parameters

BODC CODE Rank Units Short Title Title
AADYAA01 1 Days Date(Loch_Day) Date (time from 00:00 01/01/1760 to 00:00 UT on day)
AAFDZZ01 1 Days Time(Day_Fract) Time (time between 00:00 UT and timestamp)
ALATZZ01 1 Degrees Lat Latitude north
ALONZZ01 1 Degrees Lon Longitude east
MBANCT01 1 Metres BathyDepESCartCorr Sea-floor depth (below instantaneous sea level) {bathymetric depth} in the water body by echo sounder and correction using Carter's tables
 

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

Occasional data values marked as suspect throughout the series, particularly between data values marked as null.


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

Bathymetric Survey: CD682/1992 USNGDC No: 19180018

Bathymetric Survey
Reference
CD682/1992
USNGDC No 19180018
WOCE Expocode 74AB68_1; RRS Charles Darwin Cruise 68
WOCE Section AR10
Source Institution Natural Environment Research Council, UK
Survey Platform RRS Charles Darwin
Chief Scientist A.J Watson, PML
Date of Departure 09 May 1992
Port of Departure Las Palmas, Canary Islands
Date of Arrival 31 May 1992
Port of Arrival Barry, UK
Start of Survey 1992 05 09 1324 hours
Start Position 27° 19.88'N, 018° 07.76'W
End of Survey 1992 05 31 0952 hours
End Position 25° 57.57'N, 028° 31.47'W
Navigation Instrumentation GPS
Bathymetry Instrumentation Simrad EA500 10 kHz Echo-Sounder

WOCE Bathymetry Screening carried out by BODC

BODC have screened the series header information and the parameter values in the data cycles. Header information has been inspected for irregularities and inconsistencies between related information.

Positions have been checked using a visual inspection on a world map and by calculating platform speed. Time channels have been checked and corrected where appropriate. Duplicate data cycles have been removed.

Data cycles have been visually inspected and compared to ETOPO5 for guidance: Discovery cruises have bathymetry flagged where depth > 1000+ETOPO5. No data values have been altered, values suspected to be dubious have been marked as suspect. Caution documents have been written where appropiate.


Project Information

World Ocean Circulation Experiment (WOCE)

The World Ocean Circulation Experiment (WOCE) was a major international experiment which made measurements and undertook modelling studies of the deep oceans in order to provide a much improved understanding of the role of ocean circulation in changing and ameliorating the Earth's climate.

WOCE had two major goals:


Data Activity or Cruise Information

Cruise

Cruise Name CD68
Departure Date 1992-05-08
Arrival Date 1992-06-08
Principal Scientist(s)Andrew J Watson (Plymouth Marine Laboratory)
Ship RRS Charles Darwin

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