Survey Identifier: L1180WO


Format Acronym: MGD77
Data Center File Number: 06050041
Parameters Surveyed Code: 05000
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): Parke Snavely
Survey Departure Date (yyyymmdd): 19801019
Port of Departure: PORT ANGELES WA
Survey Arrival Date (yyyymmdd): 19801026
Port of Arrival: ASTORIA OREGON
Navigation Instrumentation: SATNAV, LORAN-C, DOPPLER SONAR
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 - GEOMETRICS G-801
Additional Forms of Magnetics Data: ANALOG RECORDS
Gravity Instrumentation: L&R S-53
Additional Forms of Gravity Data: ANALOG RECORDS
Seismic Instrumentation: UNIBOOM, 24 CHANNEL
Topmost Latitude of Survey: +49
Bottommost Latitude: +45
Leftmost Longitude: -127
Rightmost Longitude: -123
General Sampling Rate of Bathymetry: 20/SECONDS
Assumed Sound Velocity: 14630
General Digitizing Rate of Magnetics: 049
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
Departure Base Station Gravity: 9688711
Departure Base Station Description: PORT NGELES, WA.
Number of Data Records: 4300

Min/Max Data Record:
Date: 1980 10 19
Latitude: +45.71685
Longitude: -126.76300
Magnetics Total Field, 1st Sensor: 546353
Magnetics Residual Field: -03422
Seismic Line Number: 1
Seismic Shot-Point Number: 50

Min/Max Data Record:
Date: 1980 10 26
Latitude: +48.58950
Longitude: -123.40105
Magnetics Total Field, 1st Sensor: 562480
Magnetics Residual Field: +01915
Seismic Line Number: 18
Seismic Shot-Point Number: 3080