Survey Identifier: HS7702
Format Acronym: MGD77
Data Center File Number: J1020018
Parameters Surveyed Code: 5
File Creation Date (yyyymmdd): 19880928
Source Institution: HYDROGRAPHIC DEPT. M.S.A.
Country: JAPAN
Platform Name: SHOYO
Platform Type Code: 1
Platform Type: SHIP
Project: MINAMI IOTO NANPO 2
Survey Departure Date (yyyymmdd): 19770518
Port of Departure: TOKYO
Survey Arrival Date (yyyymmdd): 19770606
Port of Arrival: TOKYO
Magnetics Instrumentation: PROTON MAG
Topmost Latitude of Survey: +24
Bottommost Latitude: +22
Leftmost Longitude: +141
Rightmost Longitude: +144
General Digitizing Rate of Bathymetry: 100
General Sampling Rate of Bathymetry: 1/SECOND
Assumed Sound Velocity: 15000
Bathymetric Datum Code: 07
General Digitizing Rate of Magnetics: 050
General Sampling Rate of Magnetics: 60
Magnetic Sensor Tow Distance: 0250
Reference Field Code: 03
Reference Field: DGRF
Method of Applying Residual Field: DIRUNAL CORRECTIONS USING OBSERVATORY DATA
Additional Documentation: magnetics has no times OLD NGDC:56080018
Number of Data Records: 687
Min/Max Data Record:
Latitude: +22.18783
Longitude: +141.67074
Magnetics Total Field, 1st Sensor: 383100
Magnetics Residual Field: -07162
Min/Max Data Record:
Latitude: +23.95788
Longitude: +143.22553
Magnetics Total Field, 1st Sensor: 397000
Magnetics Residual Field: +05811