Survey Identifier: EW9201
Format Acronym: MGD77
Data Center File Number: 01210047
Parameters Surveyed Code: 55513
File Creation Date (yyyymmdd): 19961104
Source Institution: LAMONT-DOHERTY EARTH OBSERVATORY (LDEO)
Country: USA
Platform Name: R/V MAURICE EWING
Platform Type Code: 1
Platform Type: SHIP
Chief Scientist(s): S.CANDE, W.HAXBY, C.RAYMOND
Project: FRACTURE ZONE XII, PACIFIC-ANTARCTIC RIDGE
Funding: NSF OCE91-03573
Survey Departure Date (yyyymmdd): 19920115
Port of Departure: LYTTLETON, NEW ZEALAND
Survey Arrival Date (yyyymmdd): 19920228
Port of Arrival: LYTTLETON, NEW ZEALAND
Navigation Instrumentation: MAGNAVOX MX-1107RS TRANSIT, T-SET GPS
Geodetic Datum/Position: GPS/TRANSIT FIXES + SPEED/HEADING
Bathymetry Instrumentation: ATLAS HYDROSWEEP-DS MULTIBEAM SONAR
Magnetics Instrumentation: VARIAN V-75 MAGNETOMETER
Gravity Instrumentation: BODENSEEWERKE KSS-30 GRAVIMETER
Seismic Instrumentation: DIGICON DMS-2000 MULTI-CHANNEL ARRAY
Topmost Latitude of Survey: -43
Bottommost Latitude: -73
Leftmost Longitude: +172
Rightmost Longitude: -150
General Digitizing Rate of Bathymetry: 010
Assumed Sound Velocity: 15000
Bathymetric Datum Code: 00
Interpolation Scheme: 1-MINUTE INTERVALS
General Digitizing Rate of Magnetics: 010
Reference Field Code: 88
Reference Field: IGRF-90
Method of Applying Residual Field: BILINEAR INTERPOLATION IN 1-DEGREE SQUARE
General Digitizing Rate of Gravity: 010
Theoretical Gravity Formula Code: 2
Theoretical Gravity Formula: INTERNATIONAL 30
Reference System Code: 2
Reference System: POTSDAM SYSTEM
Corrections Applied: DRIFT .0077 MGAL/DAY, DC .49
Departure Base Station Gravity: 9805081
Departure Base Station Description: ACIC 0217-0
Arrival Base Station Gravity: 9805081
Arrival Base Station Description: ACIC 0217-0
Additional Documentation: TIME: KINEMETRICS GPS-DC, SPEED: FURUNO CI-30, HEADING: SPERRY MK-27, OTHER DATA: DREDGES, SCIENCE OFFICER: J.STENNETT COMPUTER SYSTEMS: W.ROBINSON, DATA REDUCED BY LDEO MARINE OFFICE DATA REDUCTION GROUP, CONTACT LDEO MG&G ARCHIVIST WITH QUESTIONS/PROBLEMS: MGGDB@LDEO.COLUMBIA.EDU, ORIGINAL RECORDS ARCHIVED AT LDEO, NGDC MULTIBEAM DATA DOWLOADED FROM http://ocean-ridge.ldeo.columbia.edu/
Number of Data Records: 63499
Min/Max Data Record:
Date: 1992 01 15
Latitude: -72.42230
Longitude: -179.99957
Bathymetry, 2- Way Traveltime: 000200
Bathymetry, Corrected Depth: 15.0
Magnetics Total Field, 1st Sensor: 602980
Magnetics Residual Field: -09640
Free-Air Anomaly: -0663
Min/Max Data Record:
Date: 1992 02 28
Latitude: -43.52452
Longitude: +179.99987
Bathymetry, 2- Way Traveltime: 073440
Bathymetry, Corrected Depth: 5517.0
Magnetics Total Field, 1st Sensor: 646460
Magnetics Residual Field: +16490
Free-Air Anomaly: +0757