Survey Identifier: V2711
Format Acronym: MGD77
Data Center File Number: 01030125
Parameters Surveyed Code: 50533
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. G. BRYAN
Project: CRUISE 27, LEG 11
Survey Departure Date (yyyymmdd): 19700206
Port of Departure: CAPE TOWN, SOUTH AFRICA
Survey Arrival Date (yyyymmdd): 19700210
Port of Arrival: CAPE TOWN, SOUTH AFRICA
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 25.IN.AIRGUN, EEL,DRUM RECORDER
Formats of Seismic Data: TWO, 2-CHANNEL SHEET RECORDS
Topmost Latitude of Survey: -29
Bottommost Latitude: -34
Leftmost Longitude: +015
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 - 3.5 AND 12 KHZ, WIDE BEAM (60 DEG), 1 SECOND SWEEP
Number of Data Records: 1211
Min/Max Data Record:
Date: 1970 02 06
Latitude: -33.85670
Longitude: +15.04350
Bathymetry, 2- Way Traveltime: 000475
Bathymetry, Corrected Depth: 36.0
Free-Air Anomaly: -0194
Min/Max Data Record:
Date: 1970 02 10
Latitude: -29.69470
Longitude: +18.40760
Bathymetry, 2- Way Traveltime: 010600
Bathymetry, Corrected Depth: 791.0
Free-Air Anomaly: +0485