Survey Identifier: V3409
Format Acronym: MGD77
Data Center File Number: 01030223
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): R. N. ANDERSON
Project: CRUISE V34, LEG 09
Survey Departure Date (yyyymmdd): 19771102
Port of Departure: MAHE, SEYCHELLES
Survey Arrival Date (yyyymmdd): 19771129
Port of Arrival: PORT LOUIS, MAURITIUS
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: -05
Bottommost Latitude: -35
Leftmost Longitude: +054
Rightmost Longitude: +069
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: 8325
Min/Max Data Record:
Date: 1977 11 02
Latitude: -34.71410
Longitude: +54.27080
Bathymetry, 2- Way Traveltime: 000325
Bathymetry, Corrected Depth: 24.0
Magnetics Total Field, 1st Sensor: 354530
Magnetics Residual Field: -05490
Free-Air Anomaly: -1067
Min/Max Data Record:
Date: 1977 12 06
Latitude: -5.23930
Longitude: +68.32170
Bathymetry, 2- Way Traveltime: 077225
Bathymetry, Corrected Depth: 5844.0
Magnetics Total Field, 1st Sensor: 432630
Magnetics Residual Field: +04300
Free-Air Anomaly: +1006