Survey Identifier: HT870415
Format Acronym: MGD77
Data Center File Number: J1010019
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): S.KATO
Project: 12TH(FIRST) CONTINENTAL SHELF SURVEY
Funding: HYDROGRAPHIC DEP
Survey Departure Date (yyyymmdd): 19870415
Port of Departure: TOKYO,JAPAN
Survey Arrival Date (yyyymmdd): 19870425
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: +28
Leftmost Longitude: +132
Rightmost Longitude: +136
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:56060019
Number of Data Records: 1499
Min/Max Data Record:
Date: 1987 04 15
Latitude: +28.83233
Longitude: +132.48350
Bathymetry, Corrected Depth: 1500.0
Magnetics Residual Field: -04430
Free-Air Anomaly: -0230
Min/Max Data Record:
Date: 1987 04 25
Latitude: +30.33567
Longitude: +135.08733
Bathymetry, Corrected Depth: 4990.0
Magnetics Residual Field: +06470
Free-Air Anomaly: +1060