Survey Identifier: V2604
Format Acronym: MGD77
Data Center File Number: 01030108
Parameters Surveyed Code: 55533
File Creation Date (yyyymmdd): 19890703
Source Institution: LAMONT-DOHERTY GEOLOGICAL OBSERVATORY
Country: U.S.A.
Platform Name: VEMA
Platform Type Code: 1
Platform Type: SHIP
Chief Scientist(s): DR. MANIK TALWANI
Project: CRUISE 26, LEG 04
Survey Departure Date (yyyymmdd): 19681026
Port of Departure: DAKAR, SENEGAL
Survey Arrival Date (yyyymmdd): 19681125
Port of Arrival: RIO DE JANEIRO, BRAZIL
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 PROTRON-PRCESSION
Additional Forms of Magnetics Data: ANALOG RECORDS
Gravity Instrumentation: GRAF-ASKANIA GSS2-33
Additional Forms of Gravity Data: ANALOG RECORDS
Seismic Instrumentation: L-DGO 25CU.IN.AIRGUN, EEL,DRUM RECORDER
Formats of Seismic Data: TWO, 2-CHANNEL SHEET RECORDS
Topmost Latitude of Survey: +15
Bottommost Latitude: -30
Leftmost Longitude: -044
Rightmost Longitude: -009
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 NAV. PTS.
General Digitizing Rate of Gravity: 100
General Sampling Rate of Gravity: 00
Theoretical Gravity Formula Code: 2
Theoretical Gravity Formula: INTERNATIONAL1930
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: 16248
Min/Max Data Record:
Date: 1968 10 26
Latitude: -29.11480
Longitude: -43.14330
Bathymetry, 2- Way Traveltime: 000300
Bathymetry, Corrected Depth: 22.0
Magnetics Total Field, 1st Sensor: 246660
Magnetics Residual Field: -05540
Free-Air Anomaly: -0652
Min/Max Data Record:
Date: 1968 11 25
Latitude: +14.66330
Longitude: -9.88070
Bathymetry, 2- Way Traveltime: 080575
Bathymetry, Corrected Depth: 6101.0
Magnetics Total Field, 1st Sensor: 328790
Magnetics Residual Field: +06300
Free-Air Anomaly: +0742