Survey Identifier: MW8711
Format Acronym: MGD77
Data Center File Number: 08020043
Parameters Surveyed Code: 55511
File Creation Date (yyyymmdd): 19901105
Source Institution: HAWAII INSTITUTE OF GEOPHYSICS
Country: U.S.A.
Platform Name: R/V MOANA WAVE
Platform Type Code: 1
Platform Type: SHIP
Chief Scientist(s): DICK HEY/DAVID NAAR
Project: EASTER MICROPLATE SEAMARC II SURVEY, MW8711
Funding: NSF
Survey Departure Date (yyyymmdd): 19871017
Port of Departure: EASTER ISLAND (RAPA NUI)
Survey Arrival Date (yyyymmdd): 19871117
Port of Arrival: EASTER ISLAND (RAPA NUI)
Navigation Instrumentation: GPS, SATNAV
Geodetic Datum/Position: PRI=GPS,SEC=SAT
Bathymetry Instrumentation: 3.5 KHZ 30 DEGREE BEAM, 1 SEC SWEEP
Additional Forms of Bathymetric Data: ANALOG, DIGITAL, MICROFILM
Magnetics Instrumentation: GEOMETRICS G 801-3
Additional Forms of Magnetics Data: ANALOG,DIGITAL
Gravity Instrumentation: LACOSTE ROMBERG S-33
Additional Forms of Gravity Data: ANALOG,DIGITAL
Seismic Instrumentation: NONE
Topmost Latitude of Survey: -21
Bottommost Latitude: -31
Leftmost Longitude: -118
Rightmost Longitude: -108
General Digitizing Rate of Bathymetry: 017
General Sampling Rate of Bathymetry: 1/SECOND
Assumed Sound Velocity: 15000
Bathymetric Datum Code: 00
Interpolation Scheme: NONE(PICKED PEAKS/TROUGHS OR 15-MIN INTERVALS IF SMOOTH)
General Digitizing Rate of Magnetics: 010
General Sampling Rate of Magnetics: 20
Magnetic Sensor Tow Distance: 0000
Sensor Depth: 00000
Horizontal Sensor Separation: 000
Reference Field Code: 88
Reference Field: IGRF-1985
Method of Applying Residual Field: FOR EACH DATA VALUE
General Digitizing Rate of Gravity: 010
General Sampling Rate of Gravity: 30
Theoretical Gravity Formula Code: 8
Theoretical Gravity Formula: IAG SYSTEM 1974
Reference System Code: 3
Reference System: IGSN 71
Corrections Applied: NONE APPLIED
Departure Base Station Gravity: 9789237
Departure Base Station Description: HONOLULU, PIER 45
Arrival Base Station Gravity: 9799755
Arrival Base Station Description: MELBOURNE,AUSTRALIA
Additional Documentation: DATA TAKEN ON BOARD:BATHYMETRY,MAGNETICS,GRAVITY,SEAMARC II SIDESCAN SONAR Additional_Documentation: BATHY, XBT'S,12KHZ PINGER,BOTTOM CAMERA STATIONS(2)
Number of Data Records: 70902
Min/Max Data Record:
Date: 1987 10 17
Latitude: -30.08122
Longitude: -118.00273
Bathymetry, 2- Way Traveltime: 008420
Bathymetry, Corrected Depth: 632.0
Magnetics Total Field, 1st Sensor: 322310
Magnetics Residual Field: -09701
Observed Gravity: 9787229
Free-Air Anomaly: -0831
Min/Max Data Record:
Date: 1987 11 17
Latitude: -21.50255
Longitude: -108.99192
Bathymetry, 2- Way Traveltime: 083530
Bathymetry, Corrected Depth: 6330.0
Magnetics Total Field, 1st Sensor: 356800
Magnetics Residual Field: +10612
Observed Gravity: 9793387
Free-Air Anomaly: +0798