Survey Identifier: GH7405
Format Acronym: MGD77
Data Center File Number: J2010001
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): 19740901
Survey Arrival Date (yyyymmdd): 19741003
Topmost Latitude of Survey: +22
Bottommost Latitude: +05
Leftmost Longitude: -179
Rightmost Longitude: -155
General Digitizing Rate of Bathymetry: 70
General Digitizing Rate of Magnetics: 57
General Digitizing Rate of Gravity: 52
Additional Documentation: OLD NGDC:56010001
Number of Data Records: 7206
Min/Max Data Record:
Date: 1974 09 01
Latitude: +5.79000
Longitude: -178.91333
Bathymetry, 2- Way Traveltime: 010787
Bathymetry, Corrected Depth: 810.0
Magnetics Total Field, 1st Sensor: 325470
Magnetics Residual Field: -08270
Observed Gravity: 9780722
Free-Air Anomaly: -0533
Min/Max Data Record:
Date: 1974 10 03
Latitude: +21.28667
Longitude: -155.37667
Bathymetry, 2- Way Traveltime: 074400
Bathymetry, Corrected Depth: 5617.0
Magnetics Total Field, 1st Sensor: 399870
Magnetics Residual Field: +19500
Observed Gravity: 9789431
Free-Air Anomaly: +3664