Survey Identifier: DI161
Format Acronym: MGD77
Data Center File Number: 19100037
Parameters Surveyed Code: 55500
File Creation Date (yyyymmdd): 19930701
Source Institution: INSTITUTE OF OCEANOGRAPHIC SCIENCES, UK
Country: UNITED KINGDOM
Platform Name: DISCOVERY
Platform Type Code: 1
Platform Type: SHIP
Chief Scientist(s): R. B. WHITMARSH
Project: DISCOVERY CRUISE 161
Funding: N.E.R.C.
Survey Departure Date (yyyymmdd): 19860815
Port of Departure: FALMOUTH, U.K.
Survey Arrival Date (yyyymmdd): 19860919
Port of Arrival: FUNCHAL, MADEIRA
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: +51
Bottommost Latitude: +31
Leftmost Longitude: -019
Rightmost Longitude: -005
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: 24748
Min/Max Data Record:
Date: 1986 08 15
Latitude: +31.38119
Longitude: -18.76750
Bathymetry, 2- Way Traveltime: 002253
Bathymetry, Corrected Depth: 169.0
Magnetics Total Field, 1st Sensor: 394290
Magnetics Residual Field: -50180
Free-Air Anomaly: -0550
Min/Max Data Record:
Date: 1986 09 19
Latitude: +50.15820
Longitude: -5.00199
Bathymetry, 2- Way Traveltime: 087386
Bathymetry, Corrected Depth: 6670.0
Magnetics Total Field, 1st Sensor: 446730
Magnetics Residual Field: +05000
Free-Air Anomaly: +1880