Survey Identifier: LY71B


Format Acronym: MGD77
Data Center File Number: 09260007
Parameters Surveyed Code: 55003
File Creation Date (yyyymmdd): 19810604
Source Institution: NAVAL OCEAN RESEARCH AND DEV. ACTIVITY
Country: U.S.A.
Platform Name: USNS LYNCH
Platform Type Code: 1
Platform Type: SHIP
Chief Scientist(s): FREITAG,J.
Survey Departure Date (yyyymmdd): 19710520
Port of Departure: ARGENTINA
Survey Arrival Date (yyyymmdd): 19710604
Port of Arrival: REYKJAVIK
Navigation Instrumentation: SATELLITE
Geodetic Datum/Position: SATELLITE/DEAD RECONKING
Bathymetry Instrumentation: 3.5 ON 12KHZ FATHOMETER
Additional Forms of Bathymetric Data: ANALOG
Magnetics Instrumentation: PROTON PRECESSION
Additional Forms of Magnetics Data: ANALOG
Topmost Latitude of Survey: +64
Bottommost Latitude: +46
Leftmost Longitude: -054
Rightmost Longitude: -023
General Digitizing Rate of Bathymetry: 74
General Sampling Rate of Bathymetry: 1 SEC SWEEP
Assumed Sound Velocity: 14630
Bathymetric Datum Code: 00
General Digitizing Rate of Magnetics: 23
General Sampling Rate of Magnetics: 03
Magnetic Sensor Tow Distance: 1000
Reference Field Code: 03
Reference Field: IGRF-65
Method of Applying Residual Field: INTERPOLATION BETWEEN NAV POINTS
Number of Data Records: 9994

Min/Max Data Record:
Date: 1971 05 20
Latitude: +46.57340
Longitude: -53.11010
Bathymetry, 2- Way Traveltime: 000275
Bathymetry, Corrected Depth: 21.0
Magnetics Total Field, 1st Sensor: 492870
Magnetics Residual Field: -33220

Min/Max Data Record:
Date: 1971 06 04
Latitude: +63.69000
Longitude: -23.80210
Bathymetry, 2- Way Traveltime: 060326
Bathymetry, Corrected Depth: 4536.0
Magnetics Total Field, 1st Sensor: 545160
Magnetics Residual Field: +28156