Survey Identifier: V1809
Format Acronym: MGD77
Data Center File Number: 01030026
Parameters Surveyed Code: 55533
File Creation Date (yyyymmdd): 19890630
Source Institution: LAMONT-DOHERTY GEOLOGICAL OBSERVATORY
Country: U.S.A.
Platform Name: VEMA
Platform Type Code: 1
Platform Type: SHIP
Chief Scientist(s): M. TALWANI
Project: CRUISE 18, LEG 9
Survey Departure Date (yyyymmdd): 19620509
Port of Departure: BUENOS AIRES, ARGENTINA
Survey Arrival Date (yyyymmdd): 19620531
Port of Arrival: CAPETOWN, SOUTH AFRICA
Navigation Instrumentation: SEXTANT
Geodetic Datum/Position: 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.IN.AIRGUN, EEL,DRUM RECORDER
Formats of Seismic Data: TWO, 2-CHANNEL SHEET RECORDS
Topmost Latitude of Survey: -30
Bottommost Latitude: -39
Leftmost Longitude: -057
Rightmost Longitude: +019
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 - 12 KHZ, WIDE BEAM (60 DEG),1 SECOND SWEEP
Number of Data Records: 3983
Min/Max Data Record:
Date: 1962 05 09
Latitude: -38.80500
Longitude: -56.31170
Bathymetry, 2- Way Traveltime: 000125
Bathymetry, Corrected Depth: 9.0
Magnetics Total Field, 1st Sensor: 252100
Magnetics Residual Field: -04540
Free-Air Anomaly: -0259
Min/Max Data Record:
Date: 1962 05 31
Latitude: -30.37330
Longitude: +18.15170
Bathymetry, 2- Way Traveltime: 069800
Bathymetry, Corrected Depth: 5261.0
Magnetics Total Field, 1st Sensor: 307270
Magnetics Residual Field: +08990
Free-Air Anomaly: +1582