Survey Identifier: MW8511
Format Acronym: MGD77
Data Center File Number: 08020033
Parameters Surveyed Code: 55530
File Creation Date (yyyymmdd): 19900502
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): D.HUSSONG/E.DAVIS/R.CURRIE
Project: MW8511. SEAMARC II SURVEY/NORTHERN JUAN DE FUCA RIDGE
Funding: GOVERNMENT OF CANADA
Survey Departure Date (yyyymmdd): 19850728
Port of Departure: VICTORIA, BRITISH COLUMBIA
Survey Arrival Date (yyyymmdd): 19850822
Port of Arrival: VICTORIA, BRITISH COLUMBIA
Navigation Instrumentation: GPS, LORAN-C, TRANSIT SATELLITE
Geodetic Datum/Position: PRIM=RHO-RHO LORAN, SEC=GPS
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: 40-120 CUBIC INCH AIRGUNS
Formats of Seismic Data: ANALOG
Topmost Latitude of Survey: +53
Bottommost Latitude: +45
Leftmost Longitude: -133
Rightmost Longitude: -125
General Digitizing Rate of Bathymetry: 021
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: 04
Reference Field: IGRF-1975
Method of Applying Residual Field: FOR EACH DATA VALUE
General Digitizing Rate of Gravity: 010
General Sampling Rate of Gravity: 60
Theoretical Gravity Formula Code: 3
Theoretical Gravity Formula: IAG SYSTEM 1967
Reference System Code: 3
Reference System: IGSN 71
Corrections Applied: NONE APPLIED
Additional Documentation: DATA TAKEN ON BOARD: BMG. SINGLE-CHANNEL SEISMIC REFLECTION. SEAMARC II-SIDE, SCAN SONAR. XBT'S.
Number of Data Records: 33813
Min/Max Data Record:
Date: 1985 07 28
Latitude: +45.89280
Longitude: -132.24465
Bathymetry, 2- Way Traveltime: 000420
Bathymetry, Corrected Depth: 31.0
Magnetics Total Field, 1st Sensor: 528760
Magnetics Residual Field: -09968
Observed Gravity: 9806637
Free-Air Anomaly: -1545
Min/Max Data Record:
Date: 1985 08 22
Latitude: +52.69428
Longitude: -125.79045
Bathymetry, 2- Way Traveltime: 043600
Bathymetry, Corrected Depth: 3244.0
Magnetics Total Field, 1st Sensor: 569200
Magnetics Residual Field: +12524
Observed Gravity: 9812663
Free-Air Anomaly: +0375