Survey Identifier: GH90-A
Format Acronym: MGD77
Data Center File Number: J2010032
Parameters Surveyed Code: 55533
File Creation Date (yyyymmdd): 19971201
Source Institution: GEOLOGICAL SURVEY OF JAPAN
Country: JAPAN
Platform Name: HAKUREI-MARU
Platform Type Code: 1
Platform Type: SHIP
Chief Scientist(s): YUKINOBU OKAMURA
Project: MARINE GEOLOGY OF EASTERN BORDER OF THE CENTRAL JAPAN SEA
Funding: AIST,MITI,JAPAN
Survey Departure Date (yyyymmdd): 19900413
Port of Departure: FUNABASHI,JAPAN
Survey Arrival Date (yyyymmdd): 19900501
Port of Arrival: NIIGATA,JAPAN
Navigation Instrumentation: MX5000 (GPS, SATNAV & LORAN-C)
Geodetic Datum/Position: GPS, SATFIX & LORAN-C INTEGRATED
Bathymetry Instrumentation: RAYTHEON 12KHZ PDR & 3.5KHZ SBP
Additional Forms of Bathymetric Data: ANALOG RECORDS
Magnetics Instrumentation: GEOMETRICS G866 PROTON PRECESSION MAG
Additional Forms of Magnetics Data: ANALOG RECORDS
Gravity Instrumentation: LACOSTE & ROMBERG SL-2 GRAVITY METER
Additional Forms of Gravity Data: ANALOG RECORDS
Seismic Instrumentation: TWO 120 CU.IN. AIRGUNS, WAVE SHAPE KIT
Formats of Seismic Data: ANALOG RECORDS
Topmost Latitude of Survey: +42
Bottommost Latitude: +34
Leftmost Longitude: +137
Rightmost Longitude: +143
General Digitizing Rate of Bathymetry: 010
Assumed Sound Velocity: 15000
Bathymetric Datum Code: 00
General Digitizing Rate of Magnetics: 012
General Sampling Rate of Magnetics: 06
Magnetic Sensor Tow Distance: 0200
Reference Field Code: 88
Reference Field: DGRF1990
General Digitizing Rate of Gravity: 011
General Sampling Rate of Gravity: 10
Theoretical Gravity Formula Code: 3
Theoretical Gravity Formula: IAG SYSTEM 1967
Reference System Code: 3
Reference System: SYSTEM IGSN 71
Corrections Applied: DRIFT CORRECTION 0.09 MGAL/DAY
Departure Base Station Gravity: 9797894
Departure Base Station Description: FUNABASHI,JAPAN
Arrival Base Station Gravity: 9797894
Arrival Base Station Description: FUNABASHI,JAPAN
Additional Documentation: BATHYMETRY CORRECTION ACCORDING TO CARTER'S TABLE, ORIGINAL DATA COLLECTED BY M. JOSHIMA & E. KIKAWA
Number of Data Records: 25392
Min/Max Data Record:
Date: 1990 04 13
Latitude: +34.82763
Longitude: +137.85202
Bathymetry, 2- Way Traveltime: 000360
Bathymetry, Corrected Depth: 27.0
Magnetics Total Field, 1st Sensor: 470910
Magnetics Residual Field: -05354
Observed Gravity: 9797036
Free-Air Anomaly: -0552
Min/Max Data Record:
Date: 1990 05 01
Latitude: +41.64783
Longitude: +142.28403
Bathymetry, 2- Way Traveltime: 028293
Bathymetry, Corrected Depth: 2080.0
Magnetics Total Field, 1st Sensor: 485390
Magnetics Residual Field: +06960
Observed Gravity: 9804214
Free-Air Anomaly: +1625