Survey Identifier: GH7504
Format Acronym: MGD77
Data Center File Number: J2010004
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): 19750616
Survey Arrival Date (yyyymmdd): 19750703
Topmost Latitude of Survey: +36
Bottommost Latitude: +30
Leftmost Longitude: +131
Rightmost Longitude: +140
General Digitizing Rate of Bathymetry: 74
General Digitizing Rate of Magnetics: 79
General Digitizing Rate of Gravity: 72
Additional Documentation: OLD NGDC:56010004
Number of Data Records: 3437
Min/Max Data Record:
Date: 1975 06 16
Latitude: +0.42667
Longitude: +131.57000
Bathymetry, 2- Way Traveltime: 000160
Bathymetry, Corrected Depth: 12.0
Magnetics Total Field, 1st Sensor: 443460
Magnetics Residual Field: -04510
Observed Gravity: 9791446
Free-Air Anomaly: -4582
Min/Max Data Record:
Date: 1975 07 03
Latitude: +35.46000
Longitude: +139.79500
Bathymetry, 2- Way Traveltime: 065680
Bathymetry, Corrected Depth: 4946.0
Magnetics Total Field, 1st Sensor: 505140
Magnetics Residual Field: +12890
Observed Gravity: 9798417
Free-Air Anomaly: +1478