Survey Identifier: HS8102
Format Acronym: MGD77
Data Center File Number: J1020024
Parameters Surveyed Code: 55513
File Creation Date (yyyymmdd): 19830727
Source Institution: HYDROGRAPHIC DEPARTMENT
Country: JAPAN
Platform Name: SHOYO
Platform Type Code: 1
Platform Type: SHIP
Chief Scientist(s): TADASHI KONDO
Project: THE BASIC MAP OF SEA OF CONTINENTAL SHELVES
Funding: HYDROGRAPHIC DEP
Survey Departure Date (yyyymmdd): 19810421
Port of Departure: TOKYO
Survey Arrival Date (yyyymmdd): 19810528
Port of Arrival: TOKYO
Navigation Instrumentation: NNSS,LORAN-C 9970-X,Y
Geodetic Datum/Position: NNSS,LORAN-C 9970-X,Y
Bathymetry Instrumentation: 50KHZ,BEAM-WIDTH 15-DEGREE*2
Additional Forms of Bathymetric Data: ANALOG RECORD
Magnetics Instrumentation: PROTON MAG
Gravity Instrumentation: TSSG-H2 SENSOR:P2,P3
Topmost Latitude of Survey: +30
Bottommost Latitude: +28
Leftmost Longitude: +128
Rightmost Longitude: +131
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: 050
General Sampling Rate of Magnetics: 60
Magnetic Sensor Tow Distance: 0250
Reference Field Code: 03
Reference Field: DGRF
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: 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:YAKU SIMA NANPO, OBSERVER:K.MATUMOTO(GRAVITY), 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 ASTRONOMICAL DIVISION, *magnetics records follow bathy,mag; mag nav has bad pts, no times.
Number of Data Records: 8846
Min/Max Data Record:
Date: 1981 04 23
Latitude: +3.60000
Longitude: +0.00000
Bathymetry, Corrected Depth: 69.0
Magnetics Total Field, 1st Sensor: 399800
Observed Gravity: 9790958
Free-Air Anomaly: -1504
Min/Max Data Record:
Date: 1981 05 22
Latitude: +88.27654
Longitude: +171.47522
Bathymetry, Corrected Depth: 3160.0
Magnetics Total Field, 1st Sensor: 567000
Observed Gravity: 9794026
Free-Air Anomaly: +0974