Survey Identifier: V1803
Format Acronym: MGD77
Data Center File Number: 01030020
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. LANGSETH
Project: CRUISE 18, LEG 3
Survey Departure Date (yyyymmdd): 19611227
Port of Departure: SAN JUAN, PUERTO RICO
Survey Arrival Date (yyyymmdd): 19620119
Port of Arrival: RECIFE, BRAZIL
Navigation Instrumentation: SEXTANT
Geodetic Datum/Position: DEAD RECKONING
Bathymetry Instrumentation: (SEE ADD. DOC./18)
Additional Forms of Bathymetric 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: +20
Bottommost Latitude: -09
Leftmost Longitude: -067
Rightmost Longitude: -033
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: 89
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: 3664
Min/Max Data Record:
Date: 1961 12 27
Latitude: -8.11340
Longitude: -66.13330
Bathymetry, 2- Way Traveltime: 000375
Bathymetry, Corrected Depth: 28.0
Magnetics Total Field, 1st Sensor: 300250
Magnetics Residual Field: -02460
Free-Air Anomaly: -1932
Min/Max Data Record:
Date: 1962 01 19
Latitude: +19.04970
Longitude: -33.85030
Bathymetry, 2- Way Traveltime: 071500
Bathymetry, Corrected Depth: 5411.0
Magnetics Total Field, 1st Sensor: 439340
Magnetics Residual Field: +03830
Free-Air Anomaly: +1623