Survey Identifier: L581NC
Format Acronym: MGD77
Data Center File Number: 06050054
Parameters Surveyed Code: 55000
File Creation Date (yyyymmdd): 19900126
Source Institution: USGS Branch of Pacific Marine Geology
Country: United States
Platform Name: Lee
Platform Type Code: 1
Platform Type: SHIP
Chief Scientist(s): Sam Clarke,Mike Field,Parke Snav
Survey Departure Date (yyyymmdd): 19810520
Port of Departure: EUREKA
Survey Arrival Date (yyyymmdd): 19810529
Port of Arrival: NEWPORT, OR
Bathymetry Instrumentation: 12KHZ NARROW 1SEC,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: 24 CHANNEL,SLAVE RECORD MASTER RECORD
Topmost Latitude of Survey: +45
Bottommost Latitude: +40
Leftmost Longitude: -126
Rightmost Longitude: -124
General Digitizing Rate of Bathymetry: 008
General Sampling Rate of Bathymetry: 20/SECONDS
Assumed Sound Velocity: 14630
General Digitizing Rate of Magnetics: 008
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 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
Number of Data Records: 14966
Min/Max Data Record:
Date: 1981 05 20
Latitude: +40.72091
Longitude: -125.35291
Bathymetry, 2- Way Traveltime: 000260
Bathymetry, Corrected Depth: 20.0
Magnetics Total Field, 1st Sensor: 517519
Magnetics Residual Field: -09459
Seismic Line Number: 001
Seismic Shot-Point Number: 41
Min/Max Data Record:
Date: 1981 05 29
Latitude: +44.88513
Longitude: -124.12861
Bathymetry, 2- Way Traveltime: 043906
Bathymetry, Corrected Depth: 3272.0
Magnetics Total Field, 1st Sensor: 546090
Magnetics Residual Field: +10659
Seismic Line Number: 012
Seismic Shot-Point Number: 3210