Survey Identifier: V3206


Format Acronym: MGD77
Data Center File Number: 01030187
Parameters Surveyed Code: 55533
File Creation Date (yyyymmdd): 19890703
Source Institution: LAMONT-DOHERTY GEOLOGICAL OBSERVATORY
Country: USA
Platform Name: VEMA
Platform Type Code: 1
Platform Type: SHIP
Chief Scientist(s): WILLIAM J. LUDWIG
Project: CRUISE 32, LEG 06
Funding: NSF-UC-C482-2
Survey Departure Date (yyyymmdd): 19750218
Port of Departure: DAKAR,SENEGAL
Survey Arrival Date (yyyymmdd): 19750320
Port of Arrival: BARBADOS, WEST INDIES
Navigation Instrumentation: SATELLITE/ SEXTANT
Geodetic Datum/Position: SATELLITE/ DEAD RECKONING
Bathymetry Instrumentation: (SEE ADD DOC / 18)
Additional Forms of Bathymetric Data: ANALOG RECORDS
Magnetics Instrumentation: L-DGO MFG PROTON-PRECESSION
Additional Forms of Magnetics Data: ANALOG RECORDS
Gravity Instrumentation: GRAF-ASKANIA GSS2-12
Additional Forms of Gravity Data: ANALOG RECORDS
Seismic Instrumentation: L-DGO 25CU-IW-AIRGUN,EEL,DRUM RECORDER
Formats of Seismic Data: TWO,2-CHANNEL SHEET RECORDS
Topmost Latitude of Survey: +22
Bottommost Latitude: +10
Leftmost Longitude: -060
Rightmost Longitude: -017
General Digitizing Rate of Bathymetry: 060
General Sampling Rate of Bathymetry: ONE SECOND
Assumed Sound Velocity: 14630
Bathymetric Datum Code: 00
Interpolation Scheme: NONE
General Digitizing Rate of Magnetics: 060
General Sampling Rate of Magnetics: 06
Reference Field Code: 03
Reference Field: IGRF-65
Method of Applying Residual Field: LINEAR INTERPOLATION BETWEEN TWO PTS
General Digitizing Rate of Gravity: 100
General Sampling Rate of Gravity: 00
Theoretical Gravity Formula Code: 2
Theoretical Gravity Formula: INTERNAT'L 1930
Reference System Code: 2
Reference System: POTSDAM SYSTEM
Additional Documentation: 06 -3.5 AND 12 KHZ, WIDE BEAM (60 DEG), 1 SECOND SWEEP
Number of Data Records: 9247

Min/Max Data Record:
Date: 1975 02 18
Latitude: +10.23840
Longitude: -59.71870
Bathymetry, 2- Way Traveltime: 000325
Bathymetry, Corrected Depth: 24.0
Magnetics Total Field, 1st Sensor: 326390
Magnetics Residual Field: -05450
Free-Air Anomaly: -0977

Min/Max Data Record:
Date: 1975 03 20
Latitude: +21.51490
Longitude: -17.41300
Bathymetry, 2- Way Traveltime: 078150
Bathymetry, Corrected Depth: 5932.0
Magnetics Total Field, 1st Sensor: 374510
Magnetics Residual Field: +03970
Free-Air Anomaly: +0926