Survey Identifier: GH801-A


Format Acronym: MGD77
Data Center File Number: J2010016
Parameters Surveyed Code: 55533
File Creation Date (yyyymmdd): 19870623
Source Institution: GEOLOGICAL SURVEY OF JAPAN
Country: JAPAN
Platform Name: HAKUREI-MARU
Platform Type Code: 1
Platform Type: SHIP
Chief Scientist(s): ATSUYUKI MIZUNO
Project: GEOLOGICAL STUDY OF DEEP-SEA MINERAL RESOURCES
Funding: GEOL. SURVEY JAPAN
Survey Departure Date (yyyymmdd): 19800112
Port of Departure: FUNABASHI, JAPAN
Survey Arrival Date (yyyymmdd): 19800206
Port of Arrival: PAPEETE, TAHITI, FRANCE
Navigation Instrumentation: MX-702 SATNAV
Geodetic Datum/Position: SATFIX & DEAD RECKONING
Bathymetry Instrumentation: NEC 12KHZ PDR & RAYTHEON 3.5 KHZ SBP
Additional Forms of Bathymetric Data: ANALOG RECORDS
Magnetics Instrumentation: GEOMETRICS G801 PROTON PRECESSION
Additional Forms of Magnetics Data: ANALOG RECORDS
Gravity Instrumentation: LACOSTE & ROMBERG S-63 GRAVITY METER
Additional Forms of Gravity Data: ANALOG RECORDS
Seismic Instrumentation: TWO BOLT 150 CU.IN. AIRGUNS
Formats of Seismic Data: RAYTHEON UGR & LSR RECORDS
Topmost Latitude of Survey: +36
Bottommost Latitude: -18
Leftmost Longitude: +139
Rightmost Longitude: -149
General Digitizing Rate of Bathymetry: 050
Assumed Sound Velocity: 15000
Bathymetric Datum Code: 00
General Digitizing Rate of Magnetics: 050
General Sampling Rate of Magnetics: 06
Magnetic Sensor Tow Distance: 0200
Reference Field Code: 88
Reference Field: PGRF1980
General Digitizing Rate of Gravity: 050
General Sampling Rate of Gravity: 10
Theoretical Gravity Formula Code: 3
Theoretical Gravity Formula: IAG SYSTEM (1971)
Reference System Code: 3
Reference System: SYSTEM IGSN 71
Corrections Applied: +0.22 MGAL/DAY
Departure Base Station Gravity: 9797889
Departure Base Station Description: FUNABASHI, JAPAN
Arrival Base Station Gravity: 9786996
Arrival Base Station Description: PAPEETE, TAHITI, FRANCE
Additional Documentation: BATHYMETRY CORRECTION ACCORDING TO CARTER'S TABLE, SAMPLING RATE OF NEC PDR IS 3/4 SEC. OR 1/8 SEC. DATA COMPILATION BY M. JOSHIMA AND T. ISHIHARA, OLD NGDC:56010016
Number of Data Records: 5955

Min/Max Data Record:
Date: 1980 01 12
Latitude: -17.47097
Longitude: -179.99811
Bathymetry, 2- Way Traveltime: 017600
Bathymetry, Corrected Depth: 1314.0
Magnetics Total Field, 1st Sensor: 324450
Magnetics Residual Field: -09220
Observed Gravity: 9779735
Free-Air Anomaly: -3085

Min/Max Data Record:
Date: 1980 02 06
Latitude: +35.59509
Longitude: +179.99384
Bathymetry, 2- Way Traveltime: 086933
Bathymetry, Corrected Depth: 6599.0
Magnetics Total Field, 1st Sensor: 430660
Magnetics Residual Field: +05910
Observed Gravity: 9798352
Free-Air Anomaly: +1247