Survey Identifier: DI134
Format Acronym: MGD77
Data Center File Number: 19100028
Parameters Surveyed Code: 55511
File Creation Date (yyyymmdd): 19850205
Source Institution: INSTITUTE OF OCEANOGRAPHIC SCIENCES, UK
Country: UNITED KINGDOM
Platform Name: DISCOVERY
Platform Type Code: 1
Platform Type: SHIP
Chief Scientist(s): T. J. G. FRANCIS
Project: DISCOVERY CRUISE 134
Funding: N.E.R.C.
Survey Departure Date (yyyymmdd): 19830301
Port of Departure: LISBON, PORTUGAL
Survey Arrival Date (yyyymmdd): 19830326
Port of Arrival: AZORES
Navigation Instrumentation: 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
Gravity Instrumentation: LACOSTE AND ROMBERG S84
Additional Forms of Gravity Data: ANALOGUE
Topmost Latitude of Survey: +43
Bottommost Latitude: +30
Leftmost Longitude: -030
Rightmost Longitude: -009
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: 88
Reference Field: IGRF-80
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
Additional Documentation: NO CRUISE REPORT, REFER TO CHIEF SCIENTIST FOR GRAVITY INFORMATION
Number of Data Records: 17826
Min/Max Data Record:
Date: 1983 03 01
Latitude: +30.72690
Longitude: -29.39030
Bathymetry, Corrected Depth: 241.0
Magnetics Total Field, 1st Sensor: 399420
Magnetics Residual Field: -08520
Free-Air Anomaly: -0580
Min/Max Data Record:
Date: 1983 03 26
Latitude: +42.85030
Longitude: -9.97470
Bathymetry, Corrected Depth: 6474.0
Magnetics Total Field, 1st Sensor: 460220
Magnetics Residual Field: +04750
Free-Air Anomaly: +1480