Survey Identifier: HS98TIS1


Format Acronym: MGD77
Data Center File Number: J1060001
Parameters Surveyed Code: 05500
File Creation Date (yyyymmdd): 20011210
Source Institution: HYDROGRAPHIC DEPARTMENT
Country: JAPAN
Platform Name: SYOYO
Platform Type Code: 1
Platform Type: SHIP
Project: SOUTH AREA OF ISHIGAKI I.(FIRST)CONTINENTAL SHELF SURVEY
Funding: HYDROGRAPHIC DEPT.
Survey Departure Date (yyyymmdd): 19981118
Port of Departure: TOKYO,JAPAN
Survey Arrival Date (yyyymmdd): 19981201
Port of Arrival: TOKYO,JAPAN
Navigation Instrumentation: GPS
Geodetic Datum/Position: INTERGRATED NAVIGATON SYSTEM
Bathymetry Instrumentation: SEA-BEAM2112 BATHYMETRIC SYSTEM 12KHz
Magnetics Instrumentation: PROTON MAGNETOMETOR (PMM-100)
Gravity Instrumentation: MARINE GRAVITYMETER SYSTEM (KSS-30)
Topmost Latitude of Survey: 25
Bottommost Latitude: 21
Leftmost Longitude: 122
Rightmost Longitude: 125
General Digitizing Rate of Magnetics: 100
General Sampling Rate of Magnetics: 30
Magnetic Sensor Tow Distance: 258
Horizontal Sensor Separation: 88
Reference Field Code: IG
Reference Field: RF-95
General Digitizing Rate of Gravity: 100
General Sampling Rate of Gravity: 05
Theoretical Gravity Formula Code: 3
Theoretical Gravity Formula: IAG System 1967
Reference System: JGSN75
Corrections Applied: EOTVOS CORRECTION
Departure Base Station Gravity: -10146
Departure Base Station Description: JHDGO(TOKYO PORT)
Arrival Base Station Gravity: UNKNOWN
Arrival Base Station Description: JHDGO(TOKYO PORT)
Additional Documentation: Sounding depth data was not used because of error, The correction for time variations were carried out with the geomagnetic, variations at the Kanoya data of Magnetic Observatory,JMA. The correction for Drift and Eotvos were applied to the gravity data and, IAG System(1967) was carried out.
Number of Data Records: 397

Min/Max Data Record:
Date: 1998 11 25
Latitude: +21.98783
Longitude: +122.37300
Magnetics Residual Field: -02490
Free-Air Anomaly: -1960

Min/Max Data Record:
Date: 1998 11 28
Latitude: +24.00850
Longitude: +124.74583
Magnetics Residual Field: +01330
Free-Air Anomaly: +0450