Survey Identifier: CD40A89


Format Acronym: MGD77
Data Center File Number: 19180008
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. H. KENYON
Project: CHARLES DARWIN CRUISE 40A 1989
Funding: N.E.R.C.
Survey Departure Date (yyyymmdd): 19890724
Port of Departure: SAN DIEGO, U.S.A.
Survey Arrival Date (yyyymmdd): 19890730
Port of Arrival: CARTEGENA, COLUMBIA
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: +14
Bottommost Latitude: +09
Leftmost Longitude: -077
Rightmost Longitude: -073
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: 8693

Min/Max Data Record:
Date: 1989 07 24
Latitude: +9.64570
Longitude: -76.97529
Bathymetry, 2- Way Traveltime: 001119
Bathymetry, Corrected Depth: 84.0
Magnetics Total Field, 1st Sensor: 363720
Magnetics Residual Field: -02640
Free-Air Anomaly: -1480

Min/Max Data Record:
Date: 1989 07 30
Latitude: +13.14610
Longitude: -73.26420
Bathymetry, 2- Way Traveltime: 052866
Bathymetry, Corrected Depth: 3983.0
Magnetics Total Field, 1st Sensor: 382540
Magnetics Residual Field: +00810
Free-Air Anomaly: +0450