Survey Identifier: CD2087
Format Acronym: MGD77
Data Center File Number: 19180002
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 20 1987
Funding: N.E.R.C.
Survey Departure Date (yyyymmdd): 19870202
Port of Departure: MOMBASA, KENYA
Survey Arrival Date (yyyymmdd): 19870226
Port of Arrival: MUSCAT, OMAN
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: +23
Bottommost Latitude: -03
Leftmost Longitude: +046
Rightmost Longitude: +068
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: 17420
Min/Max Data Record:
Date: 1987 02 02
Latitude: -2.41240
Longitude: +46.22000
Bathymetry, 2- Way Traveltime: 016146
Bathymetry, Corrected Depth: 1220.0
Magnetics Total Field, 1st Sensor: 343270
Magnetics Residual Field: -04670
Free-Air Anomaly: -0860
Min/Max Data Record:
Date: 1987 02 26
Latitude: +22.66960
Longitude: +67.01199
Bathymetry, 2- Way Traveltime: 068933
Bathymetry, Corrected Depth: 5208.0
Magnetics Total Field, 1st Sensor: 432610
Magnetics Residual Field: +03530
Free-Air Anomaly: +0480