Survey Identifier: HM7303
Format Acronym: MGD77
Data Center File Number: J1030021
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
Survey Departure Date (yyyymmdd): 19730714
Port of Departure: TOKYO
Survey Arrival Date (yyyymmdd): 19730815
Port of Arrival: TOKYO
Magnetics Instrumentation: PROTON MAG
Topmost Latitude of Survey: +34
Bottommost Latitude: +32
Leftmost Longitude: +127
Rightmost Longitude: +130
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: CRUISE NAME:NAGASAKI OKI 1, magnetics data has no times OLD NGDC:56070021
Number of Data Records: 5138
Min/Max Data Record:
Latitude: +32.51128
Longitude: +127.81671
Magnetics Total Field, 1st Sensor: 467020
Magnetics Residual Field: -05779
Min/Max Data Record:
Latitude: +33.62100
Longitude: +129.73395
Magnetics Total Field, 1st Sensor: 482940
Magnetics Residual Field: +07367