Survey Identifier: EW9102
Format Acronym: MGD77
Data Center File Number: 01210029
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): R.DETRICK, J.MUTTER
Project: EAST PACIFIC RISE 2-SHIP MCS
Funding: NSF DPP89-17631
Survey Departure Date (yyyymmdd): 19910321
Port of Departure: PUNTA ARENAS, CHILE
Survey Arrival Date (yyyymmdd): 19910507
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, 12KHZ 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: -13
Bottommost Latitude: -54
Leftmost Longitude: -150
Rightmost Longitude: -070
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: 12
Reference Field: IGRF-85
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 -.06288 MGAL/DAY, DC 24.17
Departure Base Station Gravity: 9813159
Departure Base Station Description: GW-97
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: 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, NO MULTIBEAM DATA AVAILABLE AT NGDC SOUTH OF 44 S. OR WEST OF 114.5 W.
Number of Data Records: 69242
Min/Max Data Record:
Date: 1991 03 21
Latitude: -53.93792
Longitude: -149.59794
Bathymetry, 2- Way Traveltime: 000280
Bathymetry, Corrected Depth: 21.0
Magnetics Total Field, 1st Sensor: 282740
Magnetics Residual Field: -06780
Free-Air Anomaly: -0916
Min/Max Data Record:
Date: 1991 05 07
Latitude: -13.29190
Longitude: -70.82954
Bathymetry, 2- Way Traveltime: 068480
Bathymetry, Corrected Depth: 5161.0
Magnetics Total Field, 1st Sensor: 337470
Magnetics Residual Field: +05830
Free-Air Anomaly: +2161