Survey Identifier: HT8612

Format Acronym: MGD77
Data Center File Number: J1010013
Parameters Surveyed Code: 55555
File Creation Date (yyyymmdd): 19881021
Source Institution: HYDROGRAPHIC DEPARTMENT
Country: JAPAN
Platform Name: TAKUYO
Platform Type Code: 1
Platform Type: SHIP
Chief Scientist(s): SHIGERU KATO
Funding: HYDROGRAPHIC DEP
Survey Departure Date (yyyymmdd): 19861205
Port of Departure: TOKYO
Survey Arrival Date (yyyymmdd): 19861223
Port of Arrival: TOKYO
Navigation Instrumentation: SAT/LORAN-C
Bathymetry Instrumentation: SEABEAM BATHYMETRIC SYSTEM 12KHZ
Additional Forms of Bathymetric Data: ANALOG RECORDS
Magnetics Instrumentation: PROTON PRECESSION MAGNETOMETER
Additional Forms of Magnetics Data: ANALOG RECORDS
Gravity Instrumentation: GRAVIMETER KSS/30 BODENSEEWERK GEOSYSTEM
Seismic Instrumentation: 352 OR 466-CUIN. AIRGUN 1 OR 12 CHANNELS
Formats of Seismic Data: 1CH-ANALOG 12CH-DIGITAL
Topmost Latitude of Survey: +27
Bottommost Latitude: +24
Leftmost Longitude: +127
Rightmost Longitude: +131
General Digitizing Rate of Bathymetry: 101
General Sampling Rate of Bathymetry: 2-10 SECOND
Interpolation Scheme: NO INTERPOLATED
General Digitizing Rate of Magnetics: 102
General Sampling Rate of Magnetics: 60
Magnetic Sensor Tow Distance: 0314
Sensor Depth: 03140
Reference Field Code: 88
Reference Field: IGRF 1985
General Digitizing Rate of Gravity: 102
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:56060013
Number of Data Records: 1302

Min/Max Data Record:
Date: 1986 12 11
Latitude: +24.67900
Longitude: +127.47733
Bathymetry, Corrected Depth: 406.0
Magnetics Residual Field: -03110
Free-Air Anomaly: -1230

Min/Max Data Record:
Date: 1986 12 20
Latitude: +26.43483
Longitude: +130.06283
Bathymetry, Corrected Depth: 9999.0
Magnetics Residual Field: +02250
Free-Air Anomaly: +0400