Survey Identifier: CD9B85


Format Acronym: MGD77
Data Center File Number: 19180011
Parameters Surveyed Code: 55100
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): R. C. SEARLE
Project: CHARLES DARWIN CRUISE 9B 1985
Funding: N.E.R.C.
Survey Departure Date (yyyymmdd): 19851206
Port of Departure: LISBON, PORTUGAL
Survey Arrival Date (yyyymmdd): 19860104
Port of Arrival: GLASGOW, U.K.
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: +50
Bottommost Latitude: +30
Leftmost Longitude: -026
Rightmost Longitude: -008
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-85
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: 20740

Min/Max Data Record:
Date: 1985 12 06
Latitude: +30.98829
Longitude: -25.75360
Bathymetry, 2- Way Traveltime: 000426
Bathymetry, Corrected Depth: 32.0
Magnetics Total Field, 1st Sensor: 405830
Magnetics Residual Field: -08060

Min/Max Data Record:
Date: 1986 01 04
Latitude: +49.76049
Longitude: -8.74569
Bathymetry, 2- Way Traveltime: 075866
Bathymetry, Corrected Depth: 5760.0
Magnetics Total Field, 1st Sensor: 473780
Magnetics Residual Field: +99930