Survey Identifier: HS8303
Format Acronym: MGD77
Data Center File Number: J1020016
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): 19830520
Port of Departure: TOKYO
Survey Arrival Date (yyyymmdd): 19830624
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: +34
Bottommost Latitude: +32
Leftmost Longitude: +138
Rightmost Longitude: +141
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: 9797677
Departure Base Station Description: TOKYO 35-37-21.3N 139-46-13.1
Arrival Base Station Gravity: 9797677
Arrival Base Station Description: TOKYO 35-37-21.3N 139-46-13.1
Additional Documentation: CRUISE NAME : SOUTH OFFING OF HATIZYO SIMA, OBSERVER : Y.HARADA , T.HIRAIWWA, OLD NGDC:56080016
Number of Data Records: 14234
Min/Max Data Record:
Date: 1983 05 20
Latitude: +32.33303
Longitude: +138.58201
Bathymetry, Corrected Depth: 30.0
Observed Gravity: 9795336
Free-Air Anomaly: +0049
Min/Max Data Record:
Date: 1983 06 24
Latitude: +33.00205
Longitude: +140.40109
Bathymetry, Corrected Depth: 3190.0
Observed Gravity: 9797577
Free-Air Anomaly: +1932