Survey Identifier: ELT04


Format Acronym: MGD77
Data Center File Number: 01020004
Parameters Surveyed Code: 55111
File Creation Date (yyyymmdd): 19890705
Source Institution: LAMONT-DOHERTY GEOLOGICAL OBSERVATORY
Country: UNITED STATES
Platform Name: ELTANIN
Platform Type Code: 1
Platform Type: SHIP
Chief Scientist(s): GEORGE R. TONEY
Project: CRUISE 04
Funding: NSF
Survey Departure Date (yyyymmdd): 19620707
Port of Departure: PARAISO CHILE
Survey Arrival Date (yyyymmdd): 19620831
Port of Arrival: VALPARAISO CHILE
Navigation Instrumentation: SEXTANT
Geodetic Datum/Position: DEADRECKONING
Bathymetry Instrumentation: PDR 12KHZ WIDEBEAM ONCE PER SEC SWEEP
Additional Forms of Bathymetric Data: ANALOG RECORDS
Magnetics Instrumentation: L-DGO PROTON PRECESSION
Topmost Latitude of Survey: -33
Bottommost Latitude: -63
Leftmost Longitude: -078
Rightmost Longitude: -059
General Digitizing Rate of Bathymetry: 312
General Sampling Rate of Bathymetry: ONE SECOND
Assumed Sound Velocity: 14630
Bathymetric Datum Code: 00
General Digitizing Rate of Magnetics: 150
General Sampling Rate of Magnetics: 06
Reference Field Code: 03
Reference Field: NIGRF
Method of Applying Residual Field: LINEAR INTERPOLATION BETWEEN NAV. POINTS
Number of Data Records: 3457

Min/Max Data Record:
Date: 1962 07 07
Latitude: -62.61670
Longitude: -77.65830
Bathymetry, 2- Way Traveltime: 000750
Bathymetry, Corrected Depth: 56.0
Magnetics Total Field, 1st Sensor: 273760
Magnetics Residual Field: -14190

Min/Max Data Record:
Date: 1962 08 31
Latitude: -33.05000
Longitude: -59.87500
Bathymetry, 2- Way Traveltime: 067800
Bathymetry, Corrected Depth: 5100.0
Magnetics Total Field, 1st Sensor: 417010
Magnetics Residual Field: +12570