Survey Identifier: C2907
Format Acronym: MGD77
Data Center File Number: 01010295
Parameters Surveyed Code: 51531
File Creation Date (yyyymmdd): 19901121
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. M. Langseth/G. Westbrook
Project: c2907
Funding: NSF
Survey Departure Date (yyyymmdd): 19880627
Port of Departure: Bridgetown, Barbados
Survey Arrival Date (yyyymmdd): 19880727
Port of Arrival: San Juan, Puerto Rico
Navigation Instrumentation: GPS, transit satellite, and furuno
Bathymetry Instrumentation: seabeam vertical beam
Additional Forms of Bathymetric Data: 3.5 PDR
Gravity Instrumentation: Bell BGM-3
Topmost Latitude of Survey: +19
Bottommost Latitude: +12
Leftmost Longitude: -067
Rightmost Longitude: -057
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
Reference System Code: 2
Reference System: Potsdam
Arrival Base Station Gravity: 9786806
Arrival Base Station Description: Berth B
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. No multibeam bathymetry available for this survey north of 16.25 degrees N. Other data reported to have been collected on this cruise were Deep Tow, seismics, 3.5 kHz, PUPPI, acoustic navigation, backscatter. Navigation for the multibeam bathymetry was adjusted to match bathymetry in, the survey area.
Number of Data Records: 44140
Min/Max Data Record:
Date: 1988 06 27
Latitude: +12.21645
Longitude: -66.12593
Bathymetry, 2- Way Traveltime: 001368
Bathymetry, Corrected Depth: 103.0
Observed Gravity: 9780813
Free-Air Anomaly: -2875
Min/Max Data Record:
Date: 1988 07 27
Latitude: +18.84889
Longitude: -57.20825
Bathymetry, 2- Way Traveltime: 078761
Bathymetry, Corrected Depth: 5976.0
Observed Gravity: 9787646
Free-Air Anomaly: +1020