Survey Identifier: MW8805
Format Acronym: MGD77
Data Center File Number: 08020050
Parameters Surveyed Code: 55533
File Creation Date (yyyymmdd): 19901127
Source Institution: HAWAII INST. OF GEOPHYSICS/NORTHWESTN
Country: U.S.A.
Platform Name: R/V MOANA WAVE
Platform Type Code: 1
Platform Type: SHIP
Chief Scientist(s): FRED DUENNEBIER/SY SCHLANGER
Project: MW8805. MARSHALL ISLAND GUYOTS.
Funding: NSF
Survey Departure Date (yyyymmdd): 19880423
Port of Departure: AGANA, GUAM, USA TERRITORY
Survey Arrival Date (yyyymmdd): 19880529
Port of Arrival: AGANA, GUAM, USA TERRITORY
Navigation Instrumentation: GPS, TRANSIT SATELLITE
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: 120 CU.IN. AIRGUN,80 CU.IN.(20-200HZ)
Formats of Seismic Data: ANALOG, DIGITAL, MICROFILM
Topmost Latitude of Survey: +17
Bottommost Latitude: +09
Leftmost Longitude: +144
Rightmost Longitude: +168
General Digitizing Rate of Bathymetry: 020
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: 12
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: 9785226
Departure Base Station Description: AGANA, GUAM - 6564.7
Arrival Base Station Gravity: 9789243
Arrival Base Station Description: HONOLULU, PIER 45 - 6959.6
Additional Documentation: DATA TAKEN ON BOARD: B,M,G. SEAMARC II SIDESCAN AND BATHY. DIGITAL SEISMIC (20-200HZ). ROCK DREDGES #33-68; SONOBUOY #1-19. QUESTIONABLE GRAV DATA AFTER 144/2200Z.
Number of Data Records: 76865
Min/Max Data Record:
Date: 1988 04 23
Latitude: +9.78465
Longitude: +144.59847
Bathymetry, 2- Way Traveltime: 000100
Bathymetry, Corrected Depth: 7.0
Magnetics Total Field, 1st Sensor: 323850
Magnetics Residual Field: -17704
Observed Gravity: 9779866
Free-Air Anomaly: -3039
Min/Max Data Record:
Date: 1988 05 29
Latitude: +16.35525
Longitude: +167.30430
Bathymetry, 2- Way Traveltime: 133850
Bathymetry, Corrected Depth: 10371.0
Magnetics Total Field, 1st Sensor: 364520
Magnetics Residual Field: +08404
Observed Gravity: 9786715
Free-Air Anomaly: +2586