Survey Identifier: EW9103
Format Acronym: MGD77
Data Center File Number: 01210041
Parameters Surveyed Code: 55533
File Creation Date (yyyymmdd): 19951118
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): M.MCNUTT, J.MUTTER
Project: MARQUESAS AND SOCIETY ISLANDS
Funding: NSF OCE88-17804
Survey Departure Date (yyyymmdd): 19910512
Port of Departure: PAPEETE, TAHITI
Survey Arrival Date (yyyymmdd): 19910610
Port of Arrival: PAPEETE, TAHITI
Navigation Instrumentation: MAGNAVOX MX-1107RS TRANSIT, T-SET GPS
Geodetic Datum/Position: GPS/SATELLITE FIXES + SPEED/HEADING
Bathymetry Instrumentation: ATLAS HYDROSWEEP-DS MULTIBEAM SONAR
Additional Forms of Bathymetric Data: RAYTHEON 3.5KHZ PDR
Magnetics Instrumentation: VARIAN V-75 MAGNETOMETER
Gravity Instrumentation: BODENSEEWERKE KSS-30 GRAVIMETER
Additional Forms of Gravity Data: BELL BGM-3 GRAVIMETER
Seismic Instrumentation: DIGICON DMS-2000 MULTI-CHANNEL ARRAY
Formats of Seismic Data: SONOBUOYS
Topmost Latitude of Survey: -06
Bottommost Latitude: -21
Leftmost Longitude: -152
Rightmost Longitude: -136
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 -.1611 MGAL/DAY, DC 7.3
Departure Base Station Gravity: 9786993
Departure Base Station Description: THT-N PAPEETE
Arrival Base Station Gravity: 9786993
Arrival Base Station Description: THT-N PAPEETE
Additional Documentation: TIME: KINEMETRICS 468-DC, SPEED: FURUNO CI-30, HEADING: SPERRY MK-27, 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
Number of Data Records: 40657
Min/Max Data Record:
Date: 1991 05 12
Latitude: -20.28883
Longitude: -151.25029
Bathymetry, 2- Way Traveltime: 008050
Bathymetry, Corrected Depth: 610.0
Magnetics Total Field, 1st Sensor: 320760
Magnetics Residual Field: -10940
Free-Air Anomaly: -0375
Min/Max Data Record:
Date: 1991 06 10
Latitude: -6.34501
Longitude: -136.57338
Bathymetry, 2- Way Traveltime: 070000
Bathymetry, Corrected Depth: 5279.0
Magnetics Total Field, 1st Sensor: 381760
Magnetics Residual Field: +08280
Free-Air Anomaly: +2214