Survey Identifier: HT880719
Format Acronym: MGD77
Data Center File Number: J1010026
Parameters Surveyed Code: 55533
File Creation Date (yyyymmdd): 19900608
Source Institution: HYDROGRAPHIC DEPARTMENT
Country: JAPAN
Platform Name: TAKUYO
Platform Type Code: 1
Platform Type: SHIP
Chief Scientist(s): M.TAKANASHI
Project: 15TH(LATTER) CONTINENTAL SHELF SURVEY
Funding: HYDROGRAPHIC DEP
Survey Departure Date (yyyymmdd): 19880719
Port of Departure: TOKYO,JAPAN
Survey Arrival Date (yyyymmdd): 19880804
Port of Arrival: TOKYO,JAPAN
Navigation Instrumentation: INTEGRATED NAVIGATION SYSTEM
Bathymetry Instrumentation: SEA-BEAM
Magnetics Instrumentation: PROTON MAGUNETMETER
Gravity Instrumentation: BODENSEEWERK KSS/30
Seismic Instrumentation: AIR-GUN,1500C,MULTI/SINGLE
Topmost Latitude of Survey: +31
Bottommost Latitude: +27
Leftmost Longitude: +134
Rightmost Longitude: +138
General Digitizing Rate of Bathymetry: 100
General Sampling Rate of Bathymetry: SECOND
Assumed Sound Velocity: 15000
Bathymetric Datum Code: 05
General Digitizing Rate of Magnetics: 100
General Sampling Rate of Magnetics: 60
Magnetic Sensor Tow Distance: 314
Reference Field Code: 12
Reference Field: IGRF-85
General Digitizing Rate of Gravity: 100
General Sampling Rate of Gravity: 60
Theoretical Gravity Formula Code: 3
Theoretical Gravity Formula: IAG SYSTEM(1967)
Reference System: JGSN 75
Departure Base Station Gravity: 9797783
Departure Base Station Description: JHDG0(TOKYO PORT)
Arrival Base Station Gravity: 9797783
Arrival Base Station Description: JHDG0(TOKYO PORT)
Additional Documentation: OLD NGDC:56060026
Number of Data Records: 1955
Min/Max Data Record:
Date: 1988 07 19
Latitude: +27.70800
Longitude: +134.98417
Bathymetry, Corrected Depth: 1630.0
Magnetics Residual Field: -02620
Free-Air Anomaly: -0080
Min/Max Data Record:
Date: 1988 08 04
Latitude: +30.04867
Longitude: +137.58417
Bathymetry, Corrected Depth: 5200.0
Magnetics Residual Field: +01530
Free-Air Anomaly: +1050