Survey Identifier: C2810
Format Acronym: MGD77
Data Center File Number: 01010286
Parameters Surveyed Code: 55533
File Creation Date (yyyymmdd): 19900213
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 John Mutter
Project: c2810
Survey Departure Date (yyyymmdd): 19871112
Port of Departure: Ireland Point, Bermuda
Survey Arrival Date (yyyymmdd): 19871204
Port of Arrival: Miami, Florida
Navigation Instrumentation: GPS & transit satellites
Geodetic Datum/Position: smoothed 1 minute course & speed
Bathymetry Instrumentation: 3.5 PDR
Magnetics Instrumentation: Varian V75 magnetometer
Gravity Instrumentation: Bell Aerospace BGM-3 gravity meter
Topmost Latitude of Survey: +31
Bottommost Latitude: +25
Leftmost Longitude: -079
Rightmost Longitude: -066
General Digitizing Rate of Bathymetry: 60
General Sampling Rate of Bathymetry: continuously
Assumed Sound Velocity: 15000
Bathymetric Datum Code: 0
General Digitizing Rate of Magnetics: 10
General Sampling Rate of Magnetics: 1
Reference Field Code: 4
General Digitizing Rate of Gravity: 10
General Sampling Rate of Gravity: 1
Theoretical Gravity Formula Code: 2
Reference System Code: 2
Arrival Base Station Gravity: 9790290
Arrival Base Station Description: ship base #2 @NOAA pier
Additional Documentation: This was a Multichannel Seismic cruise . At Ireland Point, Bermuda, there was a gravity reference station at the pier. The station is situated 0.3 meters to landward of the 5th bollard from the, breakwater that separates the north and south basins. Its value is 979845.0, The Conrad was past the 6th bollard from the breakwater. Tie-in on 10 Nov 87, Miami tie-in on 7 Dec 87 with a LaCoste meter. Ship 200 feet forward of refer.
Number of Data Records: 56133
Min/Max Data Record:
Date: 1987 11 12
Latitude: +25.75505
Longitude: -78.90849
Bathymetry, 2- Way Traveltime: 006701
Bathymetry, Corrected Depth: 511.0
Magnetics Total Field, 1st Sensor: 464220
Magnetics Residual Field: -02271
Observed Gravity: 9789291
Free-Air Anomaly: -1706
Min/Max Data Record:
Date: 1987 12 04
Latitude: +30.20393
Longitude: -66.80229
Bathymetry, 2- Way Traveltime: 074278
Bathymetry, Corrected Depth: 5635.0
Magnetics Total Field, 1st Sensor: 481620
Magnetics Residual Field: +02130
Observed Gravity: 9793819
Free-Air Anomaly: -0014