Survey Identifier: HT92T262
Format Acronym: MGD77
Data Center File Number: J1010057
Parameters Surveyed Code: 55533
File Creation Date (yyyymmdd): 19960307
Source Institution: HYDROGRAPHIC DEPARTMENT
Country: JAPAN
Platform Name: TAKUYO
Platform Type Code: 1
Platform Type: SHIP
Chief Scientist(s): OKINO MUTUTO
Project: 26TH AREA(THIRD)CONTINENTAL SHELF SURVEY
Funding: HYDROGRAPHIC DEP
Survey Departure Date (yyyymmdd): 19920608
Survey Arrival Date (yyyymmdd): 19920626
Port of Arrival: TOKYO,JAPAN
Navigation Instrumentation: GPS/NNSS/LORAN-C
Geodetic Datum/Position: INTEGRATED NAVIGATION SYSTEM
Bathymetry Instrumentation: SEA-BEAM BATHYMETRIC SYSTEM 12KHZ
Magnetics Instrumentation: PROTON MAGUNETMETER (GM-123,PMM-100)
Gravity Instrumentation: ONBOARD GRAVIMETER SYSTEM (GMBH KSS/30)
Topmost Latitude of Survey: +31
Bottommost Latitude: +26
Leftmost Longitude: +142
Rightmost Longitude: +146
General Digitizing Rate of Bathymetry: 10
General Digitizing Rate of Magnetics: 10
Magnetic Sensor Tow Distance: 314
Reference Field Code: 88
Reference Field: IGRF1990
General Digitizing Rate of Gravity: 10
Theoretical Gravity Formula Code: 3
Reference System: JGSN 75
Departure Base Station Gravity: 9797783
Departure Base Station Description: JHDGO(TOKYO PORT)
Arrival Base Station Gravity: 9797783
Arrival Base Station Description: JHDGO(TOKYO PORT)
Additional Documentation: Corection for sound velocity was applied to the seabeam data using tables for, the area No.53 in Echo-sounding Correction Tables NP 139 (Hydrographic Dept. UK,1980). The correction for time variations were carried out with the geomagnetic, variations at the Titisima data of Magnetic Observatory,JMA.
Number of Data Records: 1827
Min/Max Data Record:
Date: 1992 06 10
Latitude: +26.82433
Longitude: +142.28400
Bathymetry, Corrected Depth: 938.0
Magnetics Residual Field: -05550
Free-Air Anomaly: -2630
Min/Max Data Record:
Date: 1992 06 24
Latitude: +30.08250
Longitude: +145.67783
Bathymetry, Corrected Depth: 9710.0
Magnetics Residual Field: +04540
Free-Air Anomaly: +2730