Survey Identifier: DI177


Format Acronym: MGD77
Data Center File Number: 19100039
Parameters Surveyed Code: 51100
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): J. THOMPSON
Project: DISCOVERY CRUISE 177
Funding: N.E.R.C.
Survey Departure Date (yyyymmdd): 19880826
Port of Departure: SANTA CRUZ, TENERIFFE
Survey Arrival Date (yyyymmdd): 19881003
Port of Arrival: LISBON, PORTUGAL
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: +39
Bottommost Latitude: +25
Leftmost Longitude: -031
Rightmost Longitude: -012
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: 25803

Min/Max Data Record:
Date: 1988 08 26
Latitude: +25.63879
Longitude: -30.99290
Bathymetry, 2- Way Traveltime: 002866
Bathymetry, Corrected Depth: 218.0

Min/Max Data Record:
Date: 1988 10 03
Latitude: +38.60450
Longitude: -12.49820
Bathymetry, 2- Way Traveltime: 080866
Bathymetry, Corrected Depth: 6149.0