Survey Identifier: L980BS
Format Acronym: MGD77
Data Center File Number: 06050039
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): MIKE FISHER, GARY BOUCHER
Survey Departure Date (yyyymmdd): 19800924
Port of Departure: NOME ALASKA (DEPART)
Survey Arrival Date (yyyymmdd): 19801006
Port of Arrival: NOME ALASKA (ARRIVE)
Navigation Instrumentation: SATNAV,LORAN-C,DOPPLAR 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 MAG-GEOMETRICS G-801
Additional Forms of Magnetics Data: ANALOG RECORDS
Seismic Instrumentation: UNIBOOM, 24 CHANNEL
Topmost Latitude of Survey: +65
Bottommost Latitude: +61
Leftmost Longitude: -170
Rightmost Longitude: -163
General Digitizing Rate of Bathymetry: 032
General Sampling Rate of Bathymetry: 20/SECONDS
Assumed Sound Velocity: 14630
General Digitizing Rate of Magnetics: 033
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 PTS.
General Digitizing Rate of Gravity: 030
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: 9688986
Departure Base Station Description: NOME, ALASKA
Arrival Base Station Gravity: 9688983
Arrival Base Station Description: NOME, ALASKA
Number of Data Records: 7112
Min/Max Data Record:
Date: 1980 09 24
Latitude: +61.83404
Longitude: -169.58137
Bathymetry, 2- Way Traveltime: 000190
Bathymetry, Corrected Depth: 14.0
Magnetics Total Field, 1st Sensor: 538310
Magnetics Residual Field: -04956
Observed Gravity: 9820516
Free-Air Anomaly: -0294
Seismic Line Number: 1
Seismic Shot-Point Number: 50
Min/Max Data Record:
Date: 1980 10 06
Latitude: +64.46985
Longitude: -163.07488
Bathymetry, 2- Way Traveltime: 000630
Bathymetry, Corrected Depth: 47.0
Magnetics Total Field, 1st Sensor: 597660
Magnetics Residual Field: +50389
Observed Gravity: 9822765
Free-Air Anomaly: +0249
Seismic Line Number: 12
Seismic Shot-Point Number: 1900