Survey Identifier: L580AA
Format Acronym: MGD77
Data Center File Number: 06050035
Parameters Surveyed Code: 55500
File Creation Date (yyyymmdd): 19870612
Source Institution: USGS Branch of Pacific Marine Geology
Country: United States
Platform Name: Lee
Platform Type Code: 1
Platform Type: SHIP
Chief Scientist(s): DAVE SCHOLL / TRACY VALLIER
Survey Departure Date (yyyymmdd): 19800623
Port of Departure: LEAVE KODIAK
Survey Arrival Date (yyyymmdd): 19800705
Port of Arrival: ARRIVE DUTCH HARBOR
Navigation Instrumentation: SATNAV,INTEGRATED NAVIGATION
Geodetic Datum/Position: PRIM-SATNAV SEC-INTEGRATED NAV
Bathymetry Instrumentation: 12KHZ NARROW 1 SEC, 3.5KHZ WIDE 1 SEC
Additional Forms of Bathymetric Data: RECORDER ROLLS
Magnetics Instrumentation: PROTON PRECESSION MAG-GEOMETRICS G-801
Additional Forms of Magnetics Data: ANALOG RECORDS
Seismic Instrumentation: SINGLE CHANNEL, 24 CHANNEL
Formats of Seismic Data: ANALOG RECORDS
Topmost Latitude of Survey: +58
Bottommost Latitude: +50
Leftmost Longitude: -175
Rightmost Longitude: -152
General Digitizing Rate of Bathymetry: 020
General Sampling Rate of Bathymetry: 20/SECONDS
Assumed Sound Velocity: 14630
General Digitizing Rate of Magnetics: 010
General Sampling Rate of Magnetics: 04
Magnetic Sensor Tow Distance: 213
Reference Field Code: 04
Reference Field: IGRF-75
Method of Applying Residual Field: LINEAR INTERP.BETWEEN NAV POINTS
General Digitizing Rate of Gravity: 010
General Sampling Rate of Gravity: 15
Theoretical Gravity Formula Code: 2
Theoretical Gravity Formula: INTERNAT,IAG1967
Reference System Code: 3
Reference System: SYSTEM IGSN 71
Corrections Applied: DRIFT CORRECTIONS
Departure Base Station Gravity: 9688573
Departure Base Station Description: KODIAK, AK.
Number of Data Records: 11672
Min/Max Data Record:
Date: 1980 06 23
Latitude: +50.48417
Longitude: -175.00967
Bathymetry, 2- Way Traveltime: 001000
Bathymetry, Corrected Depth: 75.0
Magnetics Total Field, 1st Sensor: 475590
Magnetics Residual Field: -05392
Observed Gravity: 9809461
Free-Air Anomaly: -2648
Seismic Line Number: 5
Seismic Shot-Point Number: 42
Min/Max Data Record:
Date: 1980 07 05
Latitude: +57.78191
Longitude: -152.03872
Bathymetry, 2- Way Traveltime: 096500
Bathymetry, Corrected Depth: 7329.0
Magnetics Total Field, 1st Sensor: 518197
Magnetics Residual Field: +05775
Observed Gravity: 9814395
Free-Air Anomaly: +1638
Seismic Line Number: 15
Seismic Shot-Point Number: 3452