Survey Identifier: DI8902
Format Acronym: MGD77
Data Center File Number: 03030036
Parameters Surveyed Code: 50000
File Creation Date (yyyymmdd): 19960716
Source Institution: Oceanic and Atmospheric Research
Country: US
Platform Name: R/V Discoverer
Platform Type Code: 1
Platform Type: SHIP
Chief Scientist(s): Embley
Project: VENTS
Survey Departure Date (yyyymmdd): 19890923
Survey Arrival Date (yyyymmdd): 19890929
Navigation Instrumentation: Loran
Bathymetry Instrumentation: SeaBeam (Vertical Beam Extraction)
Topmost Latitude of Survey: +46
Bottommost Latitude: +42
Leftmost Longitude: -127
Rightmost Longitude: -125
General Digitizing Rate of Bathymetry: 010
General Sampling Rate of Bathymetry: VAR W/ DEPTH
Interpolation Scheme: 1 MINUTE EXTRACTIONS CLOSEST TO THE MINUTE (VERTICAL BM)
Additional Documentation: Loran data was shifted to correlate with transit satellite fixes, collected during the cruise to force the positions to near-geodetic. More shifts followed. Other parts of this data were cut and data from the 09880002 cruise(GPS) used, to replace it in a gridded data set. Data cut was JD 266 18:00 - 18:18 and, JD 270 02:23 - 02:29.
Number of Data Records: 1914
Min/Max Data Record:
Date: 1989 09 23
Latitude: +42.79570
Longitude: -126.98920
Bathymetry, 2- Way Traveltime: 028760
Bathymetry, Corrected Depth: 2134.0
Min/Max Data Record:
Date: 1989 09 29
Latitude: +45.27672
Longitude: -125.45969
Bathymetry, 2- Way Traveltime: 057520
Bathymetry, Corrected Depth: 4306.0