Survey Identifier: C2806

Format Acronym: MGD77
Data Center File Number: 01010282
Parameters Surveyed Code: 53531
File Creation Date (yyyymmdd): 19910122
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. Schilling
Project: c2806
Funding: NSF
Survey Departure Date (yyyymmdd): 19870607
Port of Departure: Recife, Brazil
Survey Arrival Date (yyyymmdd): 19870721
Port of Arrival: Fortaleza, Brazil
Navigation Instrumentation: GPS, TRANSIT SATELLITE
Geodetic Datum/Position: PRIM-GPS
Bathymetry Instrumentation: seabeam vertical beam
Additional Forms of Bathymetric Data: 3.5 PDR
Gravity Instrumentation: Bell BGM-3
Topmost Latitude of Survey: +05
Bottommost Latitude: -09
Leftmost Longitude: -039
Rightmost Longitude: -011
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 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: NGDC has multibeam bathymetric data for this cruise, however the tracklines, found here in GEODAS do not exactly correspond to the multibm data available. Other data reported to have been collected on this cruise were dredging and, magnetics.
Number of Data Records: 91631

Min/Max Data Record:
Date: 1987 06 07
Latitude: -8.06929
Longitude: -38.42706
Bathymetry, 2- Way Traveltime: 017801
Bathymetry, Corrected Depth: 1329.0
Observed Gravity: 9778134
Free-Air Anomaly: -1584

Min/Max Data Record:
Date: 1987 07 21
Latitude: +4.92188
Longitude: -11.82510
Bathymetry, 2- Way Traveltime: 077948
Bathymetry, Corrected Depth: 5898.0
Observed Gravity: 9782926
Free-Air Anomaly: +2152