Survey Identifier: EW9004


Format Acronym: MGD77
Data Center File Number: 01210031
Parameters Surveyed Code: 55531
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): A.SHOR, B.APPELGATE, C.NISHIMURA
Project: SHAKEDOWN / MID-ATLANTIC RIDGE SOUTH OF ICELAND
Funding: NSF JOI
Survey Departure Date (yyyymmdd): 19900705
Port of Departure: NEWARK, NEW JERSEY
Survey Arrival Date (yyyymmdd): 19900719
Port of Arrival: REYKJAVIK, ICELAND
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 3.5 PDR, SEAMARC-II SIDESCAN
Magnetics Instrumentation: VARIAN V-75 MAGNETOMETER
Gravity Instrumentation: BODENSEEWERKE KSS-30 GRAVIMETER
Additional Forms of Gravity Data: BELL BGM-3 GRAVIMETER
Seismic Instrumentation: NO SEISMIC DATA COLLECTED
Topmost Latitude of Survey: +65
Bottommost Latitude: +40
Leftmost Longitude: -075
Rightmost Longitude: -021
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 .0358 MGAL/DAY, DC 13.09
Departure Base Station Gravity: 9802410
Departure Base Station Description: OCEANOGRAPHY 106, LDEO
Arrival Base Station Gravity: 9822797
Arrival Base Station Description: 5450 REYKJAVIK AA
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, NO MULTIBEAM DATA AVAILABLE AT NGDC WEST OF 37.7 W.
Number of Data Records: 19222

Min/Max Data Record:
Date: 1990 07 06
Latitude: +40.34834
Longitude: -74.17857
Bathymetry, 2- Way Traveltime: 000500
Bathymetry, Corrected Depth: 38.0
Magnetics Total Field, 1st Sensor: 502560
Magnetics Residual Field: -03360
Free-Air Anomaly: -0352

Min/Max Data Record:
Date: 1990 07 19
Latitude: +64.20120
Longitude: -21.92522
Bathymetry, 2- Way Traveltime: 059800
Bathymetry, Corrected Depth: 4503.0
Magnetics Total Field, 1st Sensor: 539910
Magnetics Residual Field: +02300
Free-Air Anomaly: +0907