Survey Identifier: V1705
Format Acronym: MGD77
Data Center File Number: 01030005
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. HEIRTZLER
Project: CRUISE 17, LEG 5
Survey Departure Date (yyyymmdd): 19610218
Port of Departure: BALBOA, PANAMA
Survey Arrival Date (yyyymmdd): 19610309
Port of Arrival: VALPARISO, CHILE
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 GSS 2-14
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: +09
Bottommost Latitude: -34
Leftmost Longitude: -087
Rightmost Longitude: -071
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: 5209
Min/Max Data Record:
Date: 1961 02 18
Latitude: -33.02170
Longitude: -86.31670
Bathymetry, 2- Way Traveltime: 000275
Bathymetry, Corrected Depth: 21.0
Magnetics Total Field, 1st Sensor: 271140
Magnetics Residual Field: -06420
Free-Air Anomaly: -1704
Min/Max Data Record:
Date: 1961 03 09
Latitude: +8.85000
Longitude: -71.62000
Bathymetry, 2- Way Traveltime: 076900
Bathymetry, Corrected Depth: 5807.0
Magnetics Total Field, 1st Sensor: 382990
Magnetics Residual Field: +06470
Free-Air Anomaly: +1548