Survey Identifier: HT860111
Format Acronym: MGD77
Data Center File Number: J1010016
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): K.KETO
Project: 8TH(LATTER) CONTINENTAL SHELF SURVEY
Funding: HYDROGRAPHIC DEP
Survey Departure Date (yyyymmdd): 19860111
Port of Departure: TOKYO,JAPAN
Survey Arrival Date (yyyymmdd): 19860127
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: +28
Bottommost Latitude: +23
Leftmost Longitude: +139
Rightmost Longitude: +143
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:56060016
Number of Data Records: 2146
Min/Max Data Record:
Date: 1986 01 11
Latitude: +23.98200
Longitude: +139.98883
Bathymetry, Corrected Depth: 106.0
Magnetics Residual Field: -09920
Free-Air Anomaly: -1230
Min/Max Data Record:
Date: 1986 01 27
Latitude: +27.09167
Longitude: +142.51983
Bathymetry, Corrected Depth: 4300.0
Magnetics Residual Field: +15120
Free-Air Anomaly: +1730