Survey Identifier: V2812
Format Acronym: MGD77
Data Center File Number: 01030140
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): DRS. DENNIS KENT AND JOHN LADD
Project: CRUISE 28, LEG 12
Survey Departure Date (yyyymmdd): 19710414
Port of Departure: SUVA, FIJI
Survey Arrival Date (yyyymmdd): 19710420
Port of Arrival: SUVA, FIJI
Navigation Instrumentation: SATELLITE/SEXTANT
Geodetic Datum/Position: SATELLITE / DEAD RECKONING
Bathymetry Instrumentation: (SEE ADD. DOC./ 18)
Additional Forms of Bathymetric Data: ANALOG RECORDS
Magnetics Instrumentation: L-DGO MFG PROTRON-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: -18
Bottommost Latitude: -22
Leftmost Longitude: +174
Rightmost Longitude: +180
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 - 3.5 AND 12 KHZ, WIDE BEAM (60 DEG), 1 SECOND SWEEP
Number of Data Records: 3438
Min/Max Data Record:
Date: 1971 04 14
Latitude: -21.26010
Longitude: +174.47630
Bathymetry, 2- Way Traveltime: 017500
Bathymetry, Corrected Depth: 1313.0
Magnetics Total Field, 1st Sensor: 436790
Magnetics Residual Field: -04330
Free-Air Anomaly: -0868
Min/Max Data Record:
Date: 1971 04 20
Latitude: -18.16670
Longitude: +179.33050
Bathymetry, 2- Way Traveltime: 055600
Bathymetry, Corrected Depth: 4177.0
Magnetics Total Field, 1st Sensor: 462760
Magnetics Residual Field: +06950
Free-Air Anomaly: +0993