Survey Identifier: HS8304
Format Acronym: MGD77
Data Center File Number: J1020017
Parameters Surveyed Code: 53511
File Creation Date (yyyymmdd): 19850927
Source Institution: HYDROGRAPHIC DEPARTMENT
Country: JAPAN
Platform Name: SHOYO
Platform Type Code: 1
Platform Type: SHIP
Chief Scientist(s): K. YOSHIDA
Project: THE BASIC MAP OF SEA OF CONTINENTAL SHELVES
Funding: HYDROGRAPHIC DEP
Survey Departure Date (yyyymmdd): 19830527
Port of Departure: TOKYO
Survey Arrival Date (yyyymmdd): 19830616
Port of Arrival: TOKYO
Navigation Instrumentation: NNSS,LORAN-C,P-P SYSTEM
Geodetic Datum/Position: NNSS,LORAN-C,P-P SYSTEM
Bathymetry Instrumentation: 50KHZ,BEAM-WIDTH 15-DEGREE*2
Additional Forms of Bathymetric Data: ANALOG RECORD
Gravity Instrumentation: GRAVIMETER : KSS-30 , SENSOR : GSS 30
Topmost Latitude of Survey: +42
Bottommost Latitude: +40
Leftmost Longitude: +138
Rightmost Longitude: +140
General Digitizing Rate of Bathymetry: 050
General Sampling Rate of Bathymetry: 1/SECOND
Assumed Sound Velocity: 15000
Bathymetric Datum Code: 07
General Digitizing Rate of Gravity: 005
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: 9797705
Departure Base Station Description: TOKYO 35-37-56.9N 139-46-44.2
Arrival Base Station Gravity: 9797705
Arrival Base Station Description: TOKYO 35-37-56.9N 139-46-44.2
Additional Documentation: CRUISE NAME : SEISMIC REGION OF NIHONKAI-TYUBU EARTHQUAKE, OBSERVER : Y.HARADA , T.HIRAIWWA, OLD NGDC:56080017
Number of Data Records: 8330
Min/Max Data Record:
Date: 1983 05 30
Latitude: +40.23385
Longitude: +138.71986
Observed Gravity: 9801952
Free-Air Anomaly: -0257
Min/Max Data Record:
Date: 1983 06 13
Latitude: +41.10206
Longitude: +139.84247
Observed Gravity: 9803035
Free-Air Anomaly: +1004