Survey Identifier: EW9309
Format Acronym: MGD77
Data Center File Number: 01210038
Parameters Surveyed Code: 53300
File Creation Date (yyyymmdd): 19940526
Source Institution: Lamont-Doherty Geological Observatory
Country: United States
Platform Name: Maurice Ewing
Platform Type Code: 1
Platform Type: SHIP
Chief Scientist(s): Jean-Guy Schilling
Project: Rock Dredging (Mid-Atl.Ridge)
Funding: unknown
Survey Departure Date (yyyymmdd): 19931120
Port of Departure: Cape Town, South Africa
Survey Arrival Date (yyyymmdd): 19931227
Port of Arrival: Montevideo, Uruguay
Navigation Instrumentation: Furuno speed log, Magnavox GPS 4200D and
Geodetic Datum/Position: 1-min DR positions between GPS positio
Bathymetry Instrumentation: VERTICAL BEAM FROM ATLAS HYDROSWEEP
Topmost Latitude of Survey: -33
Bottommost Latitude: -53
Leftmost Longitude: -057
Rightmost Longitude: 019
General Digitizing Rate of Bathymetry: 10
General Sampling Rate of Bathymetry: every ping
Assumed Sound Velocity: 15000
Bathymetric Datum Code: 0
Interpolation Scheme: 1 MINUTE EXTRACTIONS CLOSEST TO THE MINUTE (VERTICAL BM)
Additional Documentation: VERTICAL BEAM BATHYMETRY PROVIDED TO NGDC BY LDEO, EXCEPT FOR DATE/TIME, 199311280008 TO 199312160007 WHERE NGDC EXTRACTED VERTICAL BEAM FROM FULL, RESOLUTION DATA. FULL RESOLUTION DATA FROM DATE/TIME 199311200636 TO, 199312260007 AVAILABLE FROM NGDC. NGDC DOWNLOADED MULTIBEAM DATA FROM http://ocean-ridge.ldeo.columbia.edu/
Number of Data Records: 52417
Min/Max Data Record:
Date: 1993 11 20
Latitude: -52.47227
Longitude: -56.14176
Bathymetry, 2- Way Traveltime: 000193
Bathymetry, Corrected Depth: 14.0
Min/Max Data Record:
Date: 1993 12 27
Latitude: -33.86284
Longitude: +18.43897
Bathymetry, 2- Way Traveltime: 075876
Bathymetry, Corrected Depth: 6043.0