Survey Identifier: ELT50
Format Acronym: MGD77
Data Center File Number: 01020053
Parameters Surveyed Code: 55513
File Creation Date (yyyymmdd): 19890706
Source Institution: LAMONT-DOHERTY GEOLOGICAL OBSERVATORY
Country: USA
Platform Name: ELTANIN
Platform Type Code: 1
Platform Type: SHIP
Chief Scientist(s): PHILLIP HENDERSHOT
Project: CRUISE 050
Funding: NSF
Survey Departure Date (yyyymmdd): 19711108
Port of Departure: FREMANTLE, AUSTRALIA
Survey Arrival Date (yyyymmdd): 19720103
Port of Arrival: LYTTLETON, NEW ZEALAND
Navigation Instrumentation: SATELLITE AND SEXTANT
Geodetic Datum/Position: SATELLITE AND DEADRECKONING
Bathymetry Instrumentation: PDR 12KHZ 60DEG WIDEBEAM 1/SEC
Additional Forms of Bathymetric Data: ANALOG DATA
Magnetics Instrumentation: VARIAN MFG. PROTON PRECESSION
Additional Forms of Magnetics Data: ANALOG DATA
Gravity Instrumentation: GRAF ASKANIA GSS-2-25
Additional Forms of Gravity Data: ANALOG DATA
Seismic Instrumentation: L-DGO 26.3CU IN AIRGUN,STREAMER,DRUM REC
Formats of Seismic Data: TWO-2 CHANNEL SHEET RECORDS
Topmost Latitude of Survey: -31
Bottommost Latitude: -67
Leftmost Longitude: +104
Rightmost Longitude: +178
General Digitizing Rate of Bathymetry: 31
General Sampling Rate of Bathymetry: 1/SECOND
Assumed Sound Velocity: 14630
Bathymetric Datum Code: 00
General Digitizing Rate of Magnetics: 040
General Sampling Rate of Magnetics: 06
Reference Field Code: 03
Reference Field: IGRF 1965
Method of Applying Residual Field: LINEAR INTERPOLOATION BETWEEN NAVIGATION POINTS
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
Departure Base Station Gravity: 9793950
Departure Base Station Description: FREMATLE, AUSTRALIA
Arrival Base Station Gravity: 9804980
Arrival Base Station Description: LYTTLETON, NEW ZEALAND
Additional Documentation: PDR3.5KHZ 38 DEGREE 1/SEC SWEEP ALSO USED ON BATHYMETRY
Number of Data Records: 26137
Min/Max Data Record:
Date: 1971 11 08
Latitude: -66.29090
Longitude: +104.82830
Bathymetry, 2- Way Traveltime: 000275
Bathymetry, Corrected Depth: 21.0
Magnetics Total Field, 1st Sensor: 585480
Magnetics Residual Field: -07750
Free-Air Anomaly: -1137
Min/Max Data Record:
Date: 1972 01 03
Latitude: -31.94730
Longitude: +177.56590
Bathymetry, 2- Way Traveltime: 085825
Bathymetry, Corrected Depth: 6507.0
Magnetics Total Field, 1st Sensor: 682760
Magnetics Residual Field: +11230
Free-Air Anomaly: +0644