Survey Identifier: V3411
Format Acronym: MGD77
Data Center File Number: 01030225
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): BRIAN TUCHOIKE
Project: CRUISE V34, LEG 11
Survey Departure Date (yyyymmdd): 19780103
Port of Departure: CAPETOWN, R.S.A.
Survey Arrival Date (yyyymmdd): 19780202
Port of Arrival: CAPETWON, R.S.A.
Navigation Instrumentation: SATELLITE, AND 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 GSS-2-12
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: -34
Bottommost Latitude: -43
Leftmost Longitude: +017
Rightmost Longitude: +029
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: 04
Reference Field: IGRF1975
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: 6532
Min/Max Data Record:
Date: 1978 01 04
Latitude: -42.56330
Longitude: +17.85420
Bathymetry, 2- Way Traveltime: 002100
Bathymetry, Corrected Depth: 157.0
Magnetics Total Field, 1st Sensor: 281810
Magnetics Residual Field: -08370
Free-Air Anomaly: -0946
Min/Max Data Record:
Date: 1978 01 31
Latitude: -34.40970
Longitude: +28.40080
Bathymetry, 2- Way Traveltime: 071900
Bathymetry, Corrected Depth: 5435.0
Magnetics Total Field, 1st Sensor: 296990
Magnetics Residual Field: +08730
Free-Air Anomaly: +0997