Survey Identifier: C2607
Format Acronym: MGD77
Data Center File Number: 01010253
Parameters Surveyed Code: 55533
File Creation Date (yyyymmdd): 19901127
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. J Mutter/R. DETRICK
Project: c2607
Funding: NSF
Survey Departure Date (yyyymmdd): 19850521
Port of Departure: Panama City, Panama
Survey Arrival Date (yyyymmdd): 19850621
Port of Arrival: Manzanillo, Mexico
Navigation Instrumentation: GPS, TRANSIT SATELLITE
Geodetic Datum/Position: dead reckoning
Bathymetry Instrumentation: seabeam
Additional Forms of Bathymetric Data: 3.5 PDR
Magnetics Instrumentation: proton procession
Gravity Instrumentation: Bell BGM-3
Topmost Latitude of Survey: +19
Bottommost Latitude: +07
Leftmost Longitude: -105
Rightmost Longitude: -079
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: NGDC has multibeam bathymetric data for this cruise, however the tracklines, found here in GEODAS do not exactly correspond to the multibm data available. Single beam bathymetric data from DATE/TIME 8505220008983 to 8505271410017 and, from 8506202355983 to 8506210619017 are from URI processed multibeam data with, an interpolation scheme in 1 MINUTE EXTRACTIONS CLOSEST TO THE MINUTE, (VERTICAL BM). Navigation for the multibeam bathymetry was shifted to match, bathymetry in the survey area. multi-channel seismics also collected
Number of Data Records: 42981
Min/Max Data Record:
Date: 1985 05 22
Latitude: -5.75090
Longitude: -104.72814
Bathymetry, 2- Way Traveltime: 000013
Bathymetry, Corrected Depth: 1.0
Magnetics Total Field, 1st Sensor: 357350
Magnetics Residual Field: -24030
Observed Gravity: 9781205
Free-Air Anomaly: -0167
Min/Max Data Record:
Date: 1985 06 21
Latitude: +18.39600
Longitude: +52.41589
Bathymetry, 2- Way Traveltime: 065680
Bathymetry, Corrected Depth: 4943.0
Magnetics Total Field, 1st Sensor: 405380
Magnetics Residual Field: +11749
Observed Gravity: 9783750
Free-Air Anomaly: +0348