Survey Identifier: GH7407


Format Acronym: MGD77
Data Center File Number: J2010002
Parameters Surveyed Code: 55500
File Creation Date (yyyymmdd): 19810911
Source Institution: GEOLOGICAL SURVEY OF JAPAN
Country: JAPAN
Platform Name: HAKUREI-MARU
Platform Type Code: 1
Platform Type: SHIP
Survey Departure Date (yyyymmdd): 19741113
Survey Arrival Date (yyyymmdd): 19741128
Topmost Latitude of Survey: +35
Bottommost Latitude: +22
Leftmost Longitude: +129
Rightmost Longitude: +140
General Digitizing Rate of Bathymetry: 79
General Digitizing Rate of Magnetics: 77
General Digitizing Rate of Gravity: 67
Additional Documentation: OLD NGDC:56010002
Number of Data Records: 3379

Min/Max Data Record:
Date: 1974 11 13
Latitude: +0.18000
Longitude: +129.62500
Bathymetry, 2- Way Traveltime: 000360
Bathymetry, Corrected Depth: 27.0
Magnetics Total Field, 1st Sensor: 409700
Magnetics Residual Field: -04790
Observed Gravity: 9787634
Free-Air Anomaly: -1766

Min/Max Data Record:
Date: 1974 11 28
Latitude: +34.93167
Longitude: +139.67167
Bathymetry, 2- Way Traveltime: 088000
Bathymetry, Corrected Depth: 6683.0
Magnetics Total Field, 1st Sensor: 455440
Magnetics Residual Field: +05680
Observed Gravity: 9798340
Free-Air Anomaly: +1818