Survey Identifier: C2511
Format Acronym: MGD77
Data Center File Number: 01010246
Parameters Surveyed Code: 55531
File Creation Date (yyyymmdd): 19901129
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. R Detrick
Project: c2511
Funding: JOIDES
Survey Departure Date (yyyymmdd): 19840913
Port of Departure: Bermuda
Survey Arrival Date (yyyymmdd): 19841014
Port of Arrival: Bermuda
Navigation Instrumentation: TRANSIT SATELLITE, GPS
Geodetic Datum/Position: dead reckoning
Bathymetry Instrumentation: seabeam
Additional Forms of Bathymetric Data: 3.5 PDR
Magnetics Instrumentation: proton procession
Gravity Instrumentation: Bell BGM-3
Topmost Latitude of Survey: +32
Bottommost Latitude: +20
Leftmost Longitude: -064
Rightmost Longitude: -043
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: NGDC has multibeam bathymetric data for this cruise, however the tracklines, found here in GEODAS do not exactly correspond to the multibeam data. Navigation for the multibeam bathymetry was shifted to match bathymetry in the, study area.
Number of Data Records: 76404
Min/Max Data Record:
Date: 1984 09 14
Latitude: +19.99440
Longitude: -63.89387
Bathymetry, 2- Way Traveltime: 016161
Bathymetry, Corrected Depth: 1218.0
Magnetics Total Field, 1st Sensor: 383220
Magnetics Residual Field: -10511
Observed Gravity: 9785185
Free-Air Anomaly: -1473
Min/Max Data Record:
Date: 1984 10 12
Latitude: +31.66813
Longitude: -43.73703
Bathymetry, 2- Way Traveltime: 084426
Bathymetry, Corrected Depth: 6429.0
Magnetics Total Field, 1st Sensor: 486200
Magnetics Residual Field: -00462
Observed Gravity: 9795249
Free-Air Anomaly: +0807