Survey Identifier: HT870930


Format Acronym: MGD77
Data Center File Number: J1010038
Parameters Surveyed Code: 33530
File Creation Date (yyyymmdd): 19910920
Source Institution: HYDROGRAPHIC DEPARTMENT
Country: JAPAN
Platform Name: TAKUYO
Platform Type Code: 1
Platform Type: SHIP
Chief Scientist(s): AKIRA ASADA
Project: TOYAMA TROUGH BATHYMETRIC SURVEY
Funding: HYDROGRAPHIC DEP
Survey Departure Date (yyyymmdd): 198709
Port of Departure: TOKYO
Survey Arrival Date (yyyymmdd): 198710
Port of Arrival: TOKYO
Navigation Instrumentation: LORAN-C,NNSS,GPS
Geodetic Datum/Position: LORAN-C,NNSS,GPS
Magnetics Instrumentation: GM-123
Topmost Latitude of Survey: +38
Bottommost Latitude: +37
Leftmost Longitude: +137
Rightmost Longitude: +139
General Digitizing Rate of Gravity: 012
Additional Documentation: OLD NGDC:56060038
Number of Data Records: 5777

Min/Max Data Record:
Date: 1987 09 29
Latitude: +37.27170
Longitude: +137.29766
Observed Gravity: 9798909
Free-Air Anomaly: -0410

Min/Max Data Record:
Date: 1987 10 04
Latitude: +37.74794
Longitude: +138.33777
Observed Gravity: 9800527
Free-Air Anomaly: +0838