Survey Identifier: C2705
Format Acronym: MGD77
Data Center File Number: 01010265
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. J Curry
Project: c2705
Funding: NSF
Survey Departure Date (yyyymmdd): 19860620
Port of Departure: Colombo, Sri Lanka
Survey Arrival Date (yyyymmdd): 19860705
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: +09
Bottommost Latitude: +03
Leftmost Longitude: +078
Rightmost Longitude: +092
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 dredging and, coring.
Number of Data Records: 19974
Min/Max Data Record:
Date: 1986 06 20
Latitude: +2.99981
Longitude: +78.75891
Bathymetry, 2- Way Traveltime: 000536
Bathymetry, Corrected Depth: 40.0
Magnetics Total Field, 1st Sensor: 396110
Magnetics Residual Field: -04130
Observed Gravity: 9778864
Free-Air Anomaly: -1199
Min/Max Data Record:
Date: 1986 07 04
Latitude: +8.00654
Longitude: +91.26203
Bathymetry, 2- Way Traveltime: 057443
Bathymetry, Corrected Depth: 4319.0
Magnetics Total Field, 1st Sensor: 414560
Magnetics Residual Field: +03735
Observed Gravity: 9782257
Free-Air Anomaly: +0581