Survey Identifier: CD64A91
Format Acronym: MGD77
Data Center File Number: 19180010
Parameters Surveyed Code: 55500
File Creation Date (yyyymmdd): 19930701
Source Institution: INSTITUTE OF OCEANOGRAPHIC SCIENCES, UK
Country: UNITED KINGDOM
Platform Name: CHARLES DARWIN
Platform Type Code: 1
Platform Type: SHIP
Chief Scientist(s): N. MILLARD
Project: CHARLES DARWIN CRUISE 64A 1991
Funding: N.E.R.C.
Survey Departure Date (yyyymmdd): 19911211
Port of Departure: BARRY ISLAND, U.K.
Survey Arrival Date (yyyymmdd): 19911219
Port of Arrival: LISBON, PORTUGAL
Navigation Instrumentation: GPS & MAGNAVOX SATELLITE NAVIGATOR
Geodetic Datum/Position: PRIM-SAT PLUS DEAD RECKONING
Bathymetry Instrumentation: PRECISION ECHO SOUNDER - IOS MK 3
Additional Forms of Bathymetric Data: ANALOGUE
Magnetics Instrumentation: VARIAN V75 PROTON PRECESSION
Additional Forms of Magnetics Data: ANALOGUE
Topmost Latitude of Survey: +52
Bottommost Latitude: +38
Leftmost Longitude: -014
Rightmost Longitude: -003
General Digitizing Rate of Bathymetry: 060
General Sampling Rate of Bathymetry: 2/SEC
Assumed Sound Velocity: 15000
Bathymetric Datum Code: 00
Interpolation Scheme: NONE
General Digitizing Rate of Magnetics: 020
General Sampling Rate of Magnetics: 02
Magnetic Sensor Tow Distance: 250
Reference Field Code: 04
Reference Field: IGRF-90
Method of Applying Residual Field: LINEAR INTERPOLATION PER DEGREE SQUARE
General Digitizing Rate of Gravity: 060
General Sampling Rate of Gravity: 00
Theoretical Gravity Formula Code: 3
Theoretical Gravity Formula: IAG SYSTEM 1967
Reference System Code: 3
Reference System: IGSN-71
Corrections Applied: CROSS COUPLING PLUS EOTVOS
Number of Data Records: 5514
Min/Max Data Record:
Date: 1991 12 11
Latitude: +38.65159
Longitude: -13.49790
Bathymetry, 2- Way Traveltime: 001293
Bathymetry, Corrected Depth: 97.0
Magnetics Total Field, 1st Sensor: 441930
Magnetics Residual Field: -01540
Free-Air Anomaly: -0800
Min/Max Data Record:
Date: 1991 12 19
Latitude: +51.34640
Longitude: -3.31389
Bathymetry, 2- Way Traveltime: 070653
Bathymetry, Corrected Depth: 5354.0
Magnetics Total Field, 1st Sensor: 446470
Magnetics Residual Field: +01780
Free-Air Anomaly: +1650