Survey Identifier: C2704
Format Acronym: MGD77
Data Center File Number: 01010264
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. W Prell
Project: c2704
Funding: NSF
Survey Departure Date (yyyymmdd): 19860513
Port of Departure: Colombo, Sri Lanka
Survey Arrival Date (yyyymmdd): 19860615
Port of Arrival: Colombo, Sri Lanka
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: +19
Bottommost Latitude: +06
Leftmost Longitude: +057
Rightmost Longitude: +080
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: Other data reported to have been collected on this cruise were coring and, dredging.
Number of Data Records: 48286
Min/Max Data Record:
Date: 1986 05 09
Latitude: +6.60215
Longitude: +57.31010
Bathymetry, 2- Way Traveltime: 000506
Bathymetry, Corrected Depth: 38.0
Magnetics Total Field, 1st Sensor: 389950
Magnetics Residual Field: -04778
Observed Gravity: 9782640
Free-Air Anomaly: -1261
Min/Max Data Record:
Date: 1986 06 17
Latitude: +18.87461
Longitude: +79.85214
Bathymetry, 2- Way Traveltime: 060376
Bathymetry, Corrected Depth: 4549.0
Magnetics Total Field, 1st Sensor: 407930
Magnetics Residual Field: +00250
Observed Gravity: 9787074
Free-Air Anomaly: +1176