Survey Identifier: C2802
Format Acronym: MGD77
Data Center File Number: 01010278
Parameters Surveyed Code: 55533
File Creation Date (yyyymmdd): 19901126
Source Institution: Lamont-Doherty Geological Observatory
Country: United States
Platform Name: R/V Conrad
Platform Type Code: 1
Platform Type: SHIP
Chief Scientist(s): Dr. P J Fox
Project: c2802
Funding: ONR
Survey Departure Date (yyyymmdd): 19870202
Port of Departure: Recife, Brazil
Survey Arrival Date (yyyymmdd): 19870310
Port of Arrival: Montevideo, Uruguay
Navigation Instrumentation: GPS, TRANSIT SATELLITE
Geodetic Datum/Position: dead reckoning
Bathymetry Instrumentation: seabeam vertical beam
Additional Forms of Bathymetric Data: 3.5 PDR
Magnetics Instrumentation: proton procession
Gravity Instrumentation: Bell BGM-3
Topmost Latitude of Survey: -08
Bottommost Latitude: -36
Leftmost Longitude: -056
Rightmost Longitude: -012
General Digitizing Rate of Bathymetry: 10
General Sampling Rate of Bathymetry: VAR W/ DEPTH
Assumed Sound Velocity: 15000
Bathymetric Datum Code: 0
General Digitizing Rate of Magnetics: 10
Reference Field Code: 4
Reference Field: IGRF-75
General Digitizing Rate of Gravity: 10
General Sampling Rate of Gravity: 60
Theoretical Gravity Formula Code: 2
Reference System Code: 2
Reference System: Potsdam
Additional Documentation: Navigation for the multibeam bathymetry was shifted to match bathymetry in the, survey area. Other data reported to have been collected on this cruise were single-channel, seismics.
Number of Data Records: 76181
Min/Max Data Record:
Date: 1987 02 02
Latitude: -35.15628
Longitude: -55.18727
Bathymetry, 2- Way Traveltime: 005948
Bathymetry, Corrected Depth: 451.0
Magnetics Total Field, 1st Sensor: 235340
Magnetics Residual Field: -07130
Observed Gravity: 9780658
Free-Air Anomaly: -0609
Min/Max Data Record:
Date: 1987 03 09
Latitude: -8.04580
Longitude: -12.31229
Bathymetry, 2- Way Traveltime: 080881
Bathymetry, Corrected Depth: 6125.0
Magnetics Total Field, 1st Sensor: 272480
Magnetics Residual Field: +06150
Observed Gravity: 9793025
Free-Air Anomaly: +1776