Survey Identifier: V2904
Format Acronym: MGD77
Data Center File Number: 01030151
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): H. KAHLE
Project: CRUISE 29, LEG 04
Survey Departure Date (yyyymmdd): 19720218
Port of Departure: PORT LOUIS, MAURITIUS
Survey Arrival Date (yyyymmdd): 19720316
Port of Arrival: CAPETOWN, 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 PROTRON-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: -17
Bottommost Latitude: -52
Leftmost Longitude: +016
Rightmost Longitude: +058
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: 8040
Min/Max Data Record:
Date: 1972 02 18
Latitude: -51.04940
Longitude: +16.65750
Bathymetry, 2- Way Traveltime: 001450
Bathymetry, Corrected Depth: 109.0
Magnetics Total Field, 1st Sensor: 285840
Magnetics Residual Field: -10550
Free-Air Anomaly: -1064
Min/Max Data Record:
Date: 1972 03 16
Latitude: -17.96350
Longitude: +57.24670
Bathymetry, 2- Way Traveltime: 081225
Bathymetry, Corrected Depth: 6127.0
Magnetics Total Field, 1st Sensor: 366930
Magnetics Residual Field: +08010
Free-Air Anomaly: +0696