Survey Identifier: HM7402
Format Acronym: MGD77
Data Center File Number: J1030022
Parameters Surveyed Code: 5
File Creation Date (yyyymmdd): 19880927
Source Institution: HYDROGRAPHIC DEPT. M.S.A.
Country: JAPAN
Platform Name: MEIYO
Platform Type Code: 1
Platform Type: SHIP
Project: ENSHU NADA 1
Survey Departure Date (yyyymmdd): 19740703
Port of Departure: TOKYO
Survey Arrival Date (yyyymmdd): 19740811
Port of Arrival: TOKYO
Magnetics Instrumentation: PROTON MAG
Topmost Latitude of Survey: +35
Bottommost Latitude: +32
Leftmost Longitude: +136
Rightmost Longitude: +138
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: DIURNAL CORRECTIONS USING OBSERVATORY DATA
Additional Documentation: magnetics has no times OLD NGDC:56070022
Number of Data Records: 3882
Min/Max Data Record:
Latitude: +32.95457
Longitude: +136.31979
Magnetics Total Field, 1st Sensor: 447600
Magnetics Residual Field: -01649
Min/Max Data Record:
Latitude: +34.63983
Longitude: +137.91786
Magnetics Total Field, 1st Sensor: 458800
Magnetics Residual Field: +01094