Survey Identifier: L982BS


Format Acronym: MGD77
Data Center File Number: 06050077
Parameters Surveyed Code: 55500
File Creation Date (yyyymmdd): 19870624
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 MARLOW, ALAN COOPER
Survey Departure Date (yyyymmdd): 19820711
Port of Departure: LV DUTCH HARBOR, AK
Survey Arrival Date (yyyymmdd): 19820803
Port of Arrival: AR NOME, AK
Navigation Instrumentation: SATELLITE, LORANC, DOPPLER
Geodetic Datum/Position: SAT, INTEGRATED NAV.
Magnetics Instrumentation: PROTON PRECESSION MAG-GEOMETRICS G-801
Additional Forms of Magnetics Data: ANALOG RECORDS
Gravity Instrumentation: LA COSTE ROMBERG SEA GRAVIMETER
Additional Forms of Gravity Data: ANALOG RECORDS
Topmost Latitude of Survey: +65
Bottommost Latitude: +53
Leftmost Longitude: +178
Rightmost Longitude: -160
General Digitizing Rate of Bathymetry: 017
General Digitizing Rate of Magnetics: 010
General Sampling Rate of Magnetics: 04
Magnetic Sensor Tow Distance: 0213
Reference Field Code: 04
Reference Field: IGRF-75
Method of Applying Residual Field: MEASURED MAGNETICS (IGRF75 + ANNUAL CHANGES)
General Digitizing Rate of Gravity: 010
General Sampling Rate of Gravity: 20
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: 37725

Min/Max Data Record:
Date: 1982 07 11
Latitude: +53.89210
Longitude: -179.99817
Bathymetry, 2- Way Traveltime: 000200
Bathymetry, Corrected Depth: 15.0
Magnetics Total Field, 1st Sensor: 467813
Magnetics Residual Field: -39138
Observed Gravity: 9813959
Free-Air Anomaly: -1531
Seismic Line Number: 1
Seismic Shot-Point Number: 50

Min/Max Data Record:
Date: 1982 08 03
Latitude: +64.48862
Longitude: +179.99953
Bathymetry, 2- Way Traveltime: 047920
Bathymetry, Corrected Depth: 3564.0
Magnetics Total Field, 1st Sensor: 575260
Magnetics Residual Field: +45916
Observed Gravity: 9822615
Free-Air Anomaly: +1878
Seismic Line Number: 14
Seismic Shot-Point Number: 9100