Survey Identifier: LY71D
Format Acronym: MGD77
Data Center File Number: 09260009
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): JOHNSON,G.L.
Survey Departure Date (yyyymmdd): 19710706
Port of Departure: ST JOHNS
Survey Arrival Date (yyyymmdd): 19710722
Port of Arrival: GODTHAAB
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: +65
Bottommost Latitude: +49
Leftmost Longitude: -057
Rightmost Longitude: -044
General Digitizing Rate of Bathymetry: 87
General Sampling Rate of Bathymetry: 1 SEC SWEEP
Assumed Sound Velocity: 14630
Bathymetric Datum Code: 00
General Digitizing Rate of Magnetics: 102
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: 3743
Min/Max Data Record:
Date: 1971 07 06
Latitude: +49.43550
Longitude: -56.40340
Bathymetry, 2- Way Traveltime: 000425
Bathymetry, Corrected Depth: 32.0
Magnetics Total Field, 1st Sensor: 500000
Magnetics Residual Field: -63520
Min/Max Data Record:
Date: 1971 07 22
Latitude: +64.10680
Longitude: -44.00000
Bathymetry, 2- Way Traveltime: 053825
Bathymetry, Corrected Depth: 4031.0
Magnetics Total Field, 1st Sensor: 571690
Magnetics Residual Field: +16783