Survey Identifier: HS7403
Format Acronym: MGD77
Data Center File Number: J1020009
Parameters Surveyed Code: 55500
File Creation Date (yyyymmdd): 19810911
Source Institution: HYDROGRAPHIC DEPT.
Country: JAPAN
Platform Name: SHOYO
Platform Type Code: 1
Platform Type: SHIP
Survey Departure Date (yyyymmdd): 19740529
Survey Arrival Date (yyyymmdd): 19740627
Magnetics Instrumentation: PROTON MAG
Topmost Latitude of Survey: +33
Bottommost Latitude: +31
Leftmost Longitude: +127
Rightmost Longitude: +131
General Digitizing Rate of Bathymetry: 76
General Digitizing Rate of Magnetics: 050
General Sampling Rate of Magnetics: 60
Magnetic Sensor Tow Distance: 250
Reference Field Code: 03
Reference Field: DGRF
Method of Applying Residual Field: DIRUNAL CORRECTIONS USING OBSERVATORY DATA
General Digitizing Rate of Gravity: 76
Additional Documentation: magnetics records follow bathy,grav. no times for mag OLD NGDC:56080009
Number of Data Records: 10445
Min/Max Data Record:
Date: 1974 05 29
Latitude: +31.13853
Longitude: +127.79098
Bathymetry, Corrected Depth: 36.0
Magnetics Total Field, 1st Sensor: 458400
Magnetics Residual Field: -07644
Observed Gravity: 9794092
Free-Air Anomaly: -0397
Min/Max Data Record:
Date: 1974 06 27
Latitude: +32.61931
Longitude: +130.30589
Bathymetry, Corrected Depth: 887.0
Magnetics Total Field, 1st Sensor: 482300
Magnetics Residual Field: +09684
Observed Gravity: 9795864
Free-Air Anomaly: +0918