Survey Identifier: EW9008
Format Acronym: MGD77
Data Center File Number: 01210034
Parameters Surveyed Code: 55511
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): L.PARSON
Project: REYKJANES RIDGE
Funding: NSF / IOS(UK)
Survey Departure Date (yyyymmdd): 19900929
Port of Departure: BERGEN, NORWAY
Survey Arrival Date (yyyymmdd): 19901026
Port of Arrival: NEWARK, NEW JERSEY
Navigation Instrumentation: MAGNAVOX MX-1107RS TRANSIT, T-SET GPS
Geodetic Datum/Position: GPS/SATELLITE/LORAN + 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: BELL BGM-3 GRAVIMETER
Additional Forms of Gravity Data: BODENSEEWERKE KSS-30 GRAVIMETER
Seismic Instrumentation: NO SEISMIC DATA COLLECTED
Topmost Latitude of Survey: +65
Bottommost Latitude: +40
Leftmost Longitude: -075
Rightmost Longitude: +006
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 .202941 MGAL/DAY, DC 15.1
Departure Base Station Gravity: 9819511
Departure Base Station Description: ACIC 2030-1
Arrival Base Station Gravity: 9802410
Arrival Base Station Description: OCEANOGRAPHY 106, LDEO
Additional Documentation: TIME: KINEMETRICS 468-DC, SPEED: FURUNO CI-30, HEADING: SPERRY MK-27, LORAN: INTERNAV LC-408, DMEC NORTHSTAR-6000, 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 WEST OF 66.5 W.
Number of Data Records: 40456
Min/Max Data Record:
Date: 1990 09 29
Latitude: +40.44274
Longitude: -74.15074
Bathymetry, 2- Way Traveltime: 000190
Bathymetry, Corrected Depth: 14.0
Magnetics Total Field, 1st Sensor: 497080
Magnetics Residual Field: -23730
Free-Air Anomaly: -0587
Min/Max Data Record:
Date: 1990 10 26
Latitude: +64.20757
Longitude: +5.31426
Bathymetry, 2- Way Traveltime: 061340
Bathymetry, Corrected Depth: 4629.0
Magnetics Total Field, 1st Sensor: 571240
Magnetics Residual Field: +43460
Free-Air Anomaly: +1136