Survey Identifier: MW8709
Format Acronym: MGD77
Data Center File Number: 08020041
Parameters Surveyed Code: 55533
File Creation Date (yyyymmdd): 19901119
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): RALPH MOBERLY/WILLIAM COULBOURN
Project: MW8709. PERU-CHILE TRENCH AND FOREARC.
Funding: NSF
Survey Departure Date (yyyymmdd): 19870801
Port of Departure: CALLAO, PERU
Survey Arrival Date (yyyymmdd): 19870902
Port of Arrival: GUAYAQUIL,ECUADOR
Navigation Instrumentation: GPS,SATNAV,RADAR,SEXTANT
Geodetic Datum/Position: PRIM=GPS, SEC=SATNAV
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: 40,100 CU.IN. AIRGUN, S.C.SEISMICS
Formats of Seismic Data: ANALOG, DIGITAL, MICROFILM
Topmost Latitude of Survey: -10
Bottommost Latitude: -21
Leftmost Longitude: -079
Rightmost Longitude: -070
General Digitizing Rate of Bathymetry: 016
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: 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: BMG. SEAMARC II SIDESCAN SONAR, DIGITAL SINGLE CHANNEL, SEISMICS. SAMPLING: STN#1-26 (FFC#1-50, RD#1-4, PC#1-8). LOGGED ADCP (DSK#1-25), T-4 XBT#1-37. LAB SHUT DOWN IN CALLAO FOR TRANSIT TO GUAYAQUIL, ECUADOR. (-78.72,-70.31,-20.25,-10.04).
Number of Data Records: 66781
Min/Max Data Record:
Date: 1987 08 01
Latitude: -20.24857
Longitude: -78.72493
Bathymetry, 2- Way Traveltime: 000090
Bathymetry, Corrected Depth: 7.0
Magnetics Total Field, 1st Sensor: 261600
Magnetics Residual Field: -00947
Observed Gravity: 9781911
Free-Air Anomaly: -2598
Min/Max Data Record:
Date: 1987 08 31
Latitude: -10.04280
Longitude: -70.31388
Bathymetry, 2- Way Traveltime: 101070
Bathymetry, Corrected Depth: 7705.0
Magnetics Total Field, 1st Sensor: 268880
Magnetics Residual Field: +01260
Observed Gravity: 9787131
Free-Air Anomaly: +0999