Survey Identifier: HS8103
Format Acronym: MGD77
Data Center File Number: J1020025
Parameters Surveyed Code: 55513
File Creation Date (yyyymmdd): 19830727
Source Institution: HYDYOGRAPHIC DEPARTMENT
Country: JAPAN
Platform Name: SHOYO
Platform Type Code: 1
Platform Type: SHIP
Chief Scientist(s): TUTOMU IKEDA
Project: THE BASIC MAP OF SEA OF CONTINENTAL SHELVES
Funding: HYDROGRAPHIC DEP
Survey Departure Date (yyyymmdd): 19810608
Port of Departure: TOKYO
Survey Arrival Date (yyyymmdd): 19810630
Port of Arrival: TOKYO
Navigation Instrumentation: NNSS,LORAN-C 9970-X,Y,Z
Geodetic Datum/Position: NNSS,LORAN-C 9970-X,Y,Z
Bathymetry Instrumentation: 50KHZ,BEAM-WIDTH 15-DEGREE*2
Additional Forms of Bathymetric Data: ANALOG RECORD
Gravity Instrumentation: TSSG-H2 SENSOR:P2,P3
Topmost Latitude of Survey: +26
Bottommost Latitude: +24
Leftmost Longitude: +141
Rightmost Longitude: +142
General Digitizing Rate of Bathymetry: 050
General Sampling Rate of Bathymetry: 1/SECOND
Assumed Sound Velocity: 15000
Bathymetric Datum Code: 5
General Digitizing Rate of Magnetics: 036
General Digitizing Rate of Gravity: 050
General Sampling Rate of Gravity: 00
Theoretical Gravity Formula Code: 3
Theoretical Gravity Formula: IAG SYSTEM(1967)
Reference System Code: 1
Reference System: SYSTEM JGSN75
Corrections Applied: DRIFT,ETOVOS
Departure Base Station Gravity: 9797715
Departure Base Station Description: TOKYO 35-38.0N,139-46.7E
Arrival Base Station Gravity: 9797715
Arrival Base Station Description: TOKYO 35-38.0N,139-46.7E
Additional Documentation: CRUISE NAME:IO SIMA OKI, OBSERVER:S.HUTINOUE, TOKYO 979771.5 MGAL 35-38.0N,139-46.7E JGSN75, REDUCTION AND COMPILATION OF GRAVITY DATA HAVE BEEN MADE BY Y.GANEKO, K.KOYAMA AND S.HUTINOUE OF ASTONOMICAL DIVISION, *magnetics records follow bathy,grav; no times for mag. OLD NGDC:56080025
Number of Data Records: 2632
Min/Max Data Record:
Date: 1981 06 10
Latitude: +24.52410
Longitude: +141.09105
Bathymetry, Corrected Depth: 94.0
Magnetics Total Field, 1st Sensor: 380700
Magnetics Residual Field: -19366
Observed Gravity: 9789677
Free-Air Anomaly: +0166
Min/Max Data Record:
Date: 1981 06 14
Latitude: +25.01439
Longitude: +141.54590
Bathymetry, Corrected Depth: 2490.0
Magnetics Total Field, 1st Sensor: 418100
Magnetics Residual Field: +17141
Observed Gravity: 9791293
Free-Air Anomaly: +1867