Survey Identifier: ELT05
Format Acronym: MGD77
Data Center File Number: 01020005
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: CRUISE05
Funding: NSF
Survey Departure Date (yyyymmdd): 19620914
Port of Departure: VALPARAISO CHILE
Survey Arrival Date (yyyymmdd): 19621114
Port of Arrival: VALPARAISO CHILE
Navigation Instrumentation: SEXTANT
Geodetic Datum/Position: DEAD RECKONING
Bathymetry Instrumentation: PDR12KHZ 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: -64
Leftmost Longitude: -077
Rightmost Longitude: -066
General Digitizing Rate of Bathymetry: 150
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
Additional Documentation: *** BAD NAVIGATION IN MGD77 FILE GOES UP ON LAND ***
Number of Data Records: 11010
Min/Max Data Record:
Date: 1962 09 14
Latitude: -63.90830
Longitude: -76.54170
Bathymetry, 2- Way Traveltime: 000250
Bathymetry, Corrected Depth: 19.0
Magnetics Total Field, 1st Sensor: 273690
Magnetics Residual Field: -10140
Min/Max Data Record:
Date: 1962 11 14
Latitude: -33.20830
Longitude: -66.61670
Bathymetry, 2- Way Traveltime: 067650
Bathymetry, Corrected Depth: 5055.0
Magnetics Total Field, 1st Sensor: 429830
Magnetics Residual Field: +02840