Survey Identifier: EW9204
Format Acronym: MGD77
Data Center File Number: 01210021
Parameters Surveyed Code: 55531
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): M.MCNUTT
Project: MARQUESAS ISLANDS OBS
Funding: NSF OCE88-17804
Survey Departure Date (yyyymmdd): 19920429
Port of Departure: PAPEETE, TAHITI
Survey Arrival Date (yyyymmdd): 19920510
Port of Arrival: NUKU HIVA, FRENCH POLYNESIA
Navigation Instrumentation: MAGNAVOX MX-1107RS TRANSIT, T-SET GPS
Geodetic Datum/Position: GPS/TRANSIT 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
Seismic Instrumentation: NO SEISMIC DATA COLLECTED
Topmost Latitude of Survey: -08
Bottommost Latitude: -18
Leftmost Longitude: -150
Rightmost Longitude: -138
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 -.01304 MGAL/DAY, DC -.24
Departure Base Station Gravity: 9805081
Departure Base Station Description: ACIC 0217-0
Arrival Base Station Gravity: 9786993
Arrival Base Station Description: THT-N PAPEETE
Additional Documentation: TIME: KINEMETRICS GPS-DC, SPEED: FURUNO CI-30, HEADING: SPERRY MK-27, OTHER DATA: OBS, SCIENCE OFFICER: J.STENNETT COMPUTER SYSTEMS: S.BUDHYPRAMONO, 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: 17053
Min/Max Data Record:
Date: 1992 04 28
Latitude: -17.53920
Longitude: -149.58650
Bathymetry, 2- Way Traveltime: 000190
Bathymetry, Corrected Depth: 14.0
Magnetics Total Field, 1st Sensor: 327830
Magnetics Residual Field: -04850
Free-Air Anomaly: -0561
Min/Max Data Record:
Date: 1992 05 10
Latitude: -8.43612
Longitude: -138.34784
Bathymetry, 2- Way Traveltime: 070550
Bathymetry, Corrected Depth: 5321.0
Magnetics Total Field, 1st Sensor: 365170
Magnetics Residual Field: +03940
Free-Air Anomaly: +2527