Survey Identifier: C2603
Format Acronym: MGD77
Data Center File Number: 01010249
Parameters Surveyed Code: 55531
File Creation Date (yyyymmdd): 19910122
Source Institution: LAMONT-DOHERTY GEOLOGICAL OBSERV./URI
Country: United States
Platform Name: R/V Conrad
Platform Type Code: 1
Platform Type: SHIP
Chief Scientist(s): Dr. Marcus Langseth
Project: c2603
Funding: NSF
Survey Departure Date (yyyymmdd): 19850302
Port of Departure: Bridgetown, Barbados
Survey Arrival Date (yyyymmdd): 19850317
Port of Arrival: Bridgetown, Barbados
Navigation Instrumentation: TRANSIT SATELLITE, GPS
Bathymetry Instrumentation: SEABEAM (VERTICAL BEAM EXTRACTION)
Magnetics Instrumentation: proton procession
Gravity Instrumentation: Bell BGM-3
Topmost Latitude of Survey: +16
Bottommost Latitude: +13
Leftmost Longitude: -060
Rightmost Longitude: -057
General Digitizing Rate of Bathymetry: 010
General Sampling Rate of Bathymetry: VAR W/ DEPTH
Assumed Sound Velocity: 15000
Interpolation Scheme: 1 MINUTE EXTRACTIONS CLOSEST TO THE MINUTE (VERTICAL BM)
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
Theoretical Gravity Formula: International 30
Reference System Code: 2
Reference System: Potsdam
Additional Documentation: Navigation for the multibeam bathymetry was shifted to match bathymetry in the, survey area. Magnetics and gravity data collected and processed by LDEO. Navigation for, magnetics and gravity processed by LDEO. Single beam bathymetry data from, vertical beam of multibeam data collected and processed by URI. Navigation for, bathymetry processed by URI. Other data reported to have been collected on, this cruise were heat flow and coring.
Number of Data Records: 33870
Min/Max Data Record:
Date: 1985 03 02
Latitude: +13.11854
Longitude: -59.75020
Bathymetry, 2- Way Traveltime: 012773
Bathymetry, Corrected Depth: 959.0
Magnetics Total Field, 1st Sensor: 364340
Magnetics Residual Field: -03390
Observed Gravity: 9781660
Free-Air Anomaly: -2283
Min/Max Data Record:
Date: 1985 03 17
Latitude: +15.54106
Longitude: -57.53218
Bathymetry, 2- Way Traveltime: 072893
Bathymetry, Corrected Depth: 5519.0
Magnetics Total Field, 1st Sensor: 377130
Magnetics Residual Field: -01910
Observed Gravity: 9784457
Free-Air Anomaly: +0298