Survey Identifier: V2107
Format Acronym: MGD77
Data Center File Number: 01030069
Parameters Surveyed Code: 55533
File Creation Date (yyyymmdd): 19890703
Source Institution: LAMONT-DOHERTY GEOLOGICAL OBSERVATORY
Country: U.S.A.
Platform Name: VEMA
Platform Type Code: 1
Platform Type: SHIP
Chief Scientist(s): W. LUDWIG
Project: CRUISE 21, LEG 7
Survey Departure Date (yyyymmdd): 19650615
Port of Departure: TOKYO, JAPAN
Survey Arrival Date (yyyymmdd): 19650705
Port of Arrival: NAHA, OKINAWA
Navigation Instrumentation: SEXTANT
Geodetic Datum/Position: DEAD RECKONING
Bathymetry Instrumentation: (SEE ADD. DOC./18)
Additional Forms of Bathymetric Data: ANALOG RECORDS
Magnetics Instrumentation: L-DGO MFG PROTON PRECESSION
Additional Forms of Magnetics Data: ANALOG RECORDS
Gravity Instrumentation: GRAF-ASKANIA GSS2-12
Additional Forms of Gravity Data: ANALOG RECORDS
Seismic Instrumentation: L-DGO 25CU.IN.AIRGUN, EEL,DRUM RECORDER
Formats of Seismic Data: TWO, 2-CHANNEL SHEET RECORDS
Topmost Latitude of Survey: +36
Bottommost Latitude: +22
Leftmost Longitude: +125
Rightmost Longitude: +147
General Digitizing Rate of Bathymetry: 060
General Sampling Rate of Bathymetry: ONE SECOND
Assumed Sound Velocity: 14630
Bathymetric Datum Code: 00
Interpolation Scheme: NONE
General Digitizing Rate of Magnetics: 060
General Sampling Rate of Magnetics: 06
Reference Field Code: 03
Reference Field: IGRF-65
Method of Applying Residual Field: LINEAR INTERPOLATION BETWEEN NAV. PTS.
General Digitizing Rate of Gravity: 100
General Sampling Rate of Gravity: 00
Theoretical Gravity Formula Code: 2
Theoretical Gravity Formula: INTERNATIONAL1930
Reference System Code: 2
Reference System: POTSDAM SYSTEM
Additional Documentation: 06 - 12 KHZ, WIDE BEAM (60 DEG), 1 SECOND SWEEP
Number of Data Records: 2331
Min/Max Data Record:
Date: 1965 06 15
Latitude: +22.81230
Longitude: +125.00080
Bathymetry, 2- Way Traveltime: 001250
Bathymetry, Corrected Depth: 94.0
Magnetics Total Field, 1st Sensor: 382060
Magnetics Residual Field: -12160
Free-Air Anomaly: -2029
Min/Max Data Record:
Date: 1965 07 05
Latitude: +35.11670
Longitude: +146.67790
Bathymetry, 2- Way Traveltime: 113000
Bathymetry, Corrected Depth: 8673.0
Magnetics Total Field, 1st Sensor: 471630
Magnetics Residual Field: +15810
Free-Air Anomaly: +3971