Survey Identifier: V1815
Format Acronym: MGD77
Data Center File Number: 01030032
Parameters Surveyed Code: 55533
File Creation Date (yyyymmdd): 19890630
Source Institution: LAMONT-DOHERTY GEOLOGICAL OBSERVATORY
Country: U.S.A.
Platform Name: VEMA
Platform Type Code: 1
Platform Type: SHIP
Chief Scientist(s): J. WORSEL
Project: CRUISE 18, LEG 15
Survey Departure Date (yyyymmdd): 19620919
Port of Departure: PAPEETE, TAHITI
Survey Arrival Date (yyyymmdd): 19621014
Port of Arrival: SALINA CRUZ, MEXICO
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: +17
Bottommost Latitude: -18
Leftmost Longitude: -150
Rightmost Longitude: -095
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: 5795
Min/Max Data Record:
Date: 1962 09 19
Latitude: -17.51670
Longitude: -149.82170
Bathymetry, 2- Way Traveltime: 000250
Bathymetry, Corrected Depth: 19.0
Magnetics Total Field, 1st Sensor: 322330
Magnetics Residual Field: -07520
Free-Air Anomaly: -1359
Min/Max Data Record:
Date: 1962 10 14
Latitude: +16.16670
Longitude: -95.10000
Bathymetry, 2- Way Traveltime: 073825
Bathymetry, Corrected Depth: 5572.0
Magnetics Total Field, 1st Sensor: 424110
Magnetics Residual Field: +03580
Free-Air Anomaly: +0649