Survey Identifier: HM7202


Format Acronym: MGD77
Data Center File Number: J1030007
Parameters Surveyed Code: 55513
File Creation Date (yyyymmdd): 19801222
Source Institution: HYDROGRAPHIC DEPT.
Country: JAPAN
Platform Name: MEIYO
Platform Type Code: 1
Platform Type: SHIP
Chief Scientist(s): TEI NAKAZIMA
Project: THE BASIC MAP OF SEA OF CONTINENTAL SHELVES
Survey Departure Date (yyyymmdd): 19720729
Port of Departure: NANAO
Survey Arrival Date (yyyymmdd): 19720922
Port of Arrival: MAIZURU
Navigation Instrumentation: LORAN-A 2S3.2S4.2S5.LORANC SS3-W,X,Y
Geodetic Datum/Position: LORAN-A 2S3.2S4.2S5,LORAN-C SS3-W,X,Y
Bathymetry Instrumentation: 50KHZ,BEAM-WIDTH 15-DEGREE*2
Additional Forms of Bathymetric Data: ANALOG RECORD
Magnetics Instrumentation: PROTON MAG
Additional Forms of Magnetics Data: TOTAL INTENSITY CHART 6336M,6337M
Gravity Instrumentation: TSSG-H1,SENSOR:P1
Additional Forms of Gravity Data: FREE AIR ANOMALY CHART 6336G,6337G
Seismic Instrumentation: AIR GUN
Formats of Seismic Data: ANALOG RECORD
Topmost Latitude of Survey: +38
Bottommost Latitude: +35
Leftmost Longitude: +134
Rightmost Longitude: +137
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 Gravity: 100
General Sampling Rate of Gravity: 00
Theoretical Gravity Formula Code: 3
Theoretical Gravity Formula: IAG SYSTEM(1967)
Reference System: SYSTEM JGSN75
Corrections Applied: DRIFT,ETOVOS
Departure Base Station Gravity: 9799740
Departure Base Station Description: NANAO 37-02.9N,136-58.7E
Arrival Base Station Gravity: 9798070
Arrival Base Station Description: MAIZURU 35-28.6N,13523.6E
Additional Documentation: CRUISE NAME:FUKUI OKI, OBSERVERS:Y.TOMIOKA AND M.TAMAKI, HUSIKI :979902 36-47.4N,137-04.0E TURUGA :979777 MGAL 35-12.2N,136-04.5E, REDUCTION AND COMPILATION OF GRAVITY DATA HAVE BEEN MADE BY T.YANAGI,Y.TOMIOKA, AND K.KATSUNO OF THE ASTRONOMICAL DIV,JHD. CONVERSION OF POTSDAM INTO IGSN 71 HAS BEEN CARRIED OUT BY Y.GANEKO. magnetics records follow bathy and grav; no times for mag OLD NGDC:56070007
Number of Data Records: 3624

Min/Max Data Record:
Date: 1972 09 13
Latitude: +34.20995
Longitude: +134.49655
Bathymetry, Corrected Depth: 20.0
Magnetics Total Field, 1st Sensor: 468200
Magnetics Residual Field: -02627
Observed Gravity: 9797652
Free-Air Anomaly: -0894

Min/Max Data Record:
Date: 1972 09 21
Latitude: +37.52457
Longitude: +136.70513
Bathymetry, Corrected Depth: 2910.0
Magnetics Total Field, 1st Sensor: 478600
Magnetics Residual Field: +05245
Observed Gravity: 9799912
Free-Air Anomaly: +2889