Survey Identifier: CD2387


Format Acronym: MGD77
Data Center File Number: 19180003
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): L. M PARSON
Project: CHARLES DARWIN CRUISE 23 1987
Funding: N.E.R.C.
Survey Departure Date (yyyymmdd): 19870514
Port of Departure: SEYCHELLES
Survey Arrival Date (yyyymmdd): 19870609
Port of Arrival: MAURITIUS
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: -06
Bottommost Latitude: -29
Leftmost Longitude: +058
Rightmost Longitude: +074
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: 19212

Min/Max Data Record:
Date: 1987 05 14
Latitude: -28.87969
Longitude: +58.64819
Bathymetry, 2- Way Traveltime: 017973
Bathymetry, Corrected Depth: 1350.0
Magnetics Total Field, 1st Sensor: 365500
Magnetics Residual Field: -02270
Free-Air Anomaly: -0790

Min/Max Data Record:
Date: 1987 06 09
Latitude: -6.66110
Longitude: +73.13319
Bathymetry, 2- Way Traveltime: 074466
Bathymetry, Corrected Depth: 5630.0
Magnetics Total Field, 1st Sensor: 437270
Magnetics Residual Field: +07180
Free-Air Anomaly: +1110