Survey Identifier: HT881101
Format Acronym: MGD77
Data Center File Number: J1010028
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): I.OKAZAKI
Project: 16TH(LATTER) CONTINENTAL SHELF SURVEY
Funding: HYDROGRAPHIC DEP
Survey Departure Date (yyyymmdd): 19881101
Port of Departure: YOKOHAMA,JAPAN
Survey Arrival Date (yyyymmdd): 19881117
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: +137
Rightmost Longitude: +141
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:56060028
Number of Data Records: 1942
Min/Max Data Record:
Date: 1988 11 01
Latitude: +27.04150
Longitude: +137.37667
Bathymetry, Corrected Depth: 826.0
Magnetics Residual Field: -03220
Free-Air Anomaly: -0040
Min/Max Data Record:
Date: 1988 11 17
Latitude: +30.06567
Longitude: +140.00967
Bathymetry, Corrected Depth: 4950.0
Magnetics Residual Field: +02350
Free-Air Anomaly: +1350