Survey Identifier: L184AN
Format Acronym: MGD77
Data Center File Number: 06050068
Parameters Surveyed Code: 55505
File Creation Date (yyyymmdd): 19870805
Source Institution: USGS Branch of Pacific Marine Geology
Country: United States
Platform Name: Lee
Platform Type Code: 1
Platform Type: SHIP
Chief Scientist(s): STEVE EITTREIM,M.HAMPTON
Project: ANTARCTIC / WILKES LAND MARGIN
Survey Departure Date (yyyymmdd): 19840104
Port of Departure: LV LYTTLETON,NZ
Survey Arrival Date (yyyymmdd): 19840201
Port of Arrival: AR MCMURDO STATION,ANT
Navigation Instrumentation: INTEGRATED NAV/LORAN-C/DOPPLER SONAR
Geodetic Datum/Position: SAT
Bathymetry Instrumentation: 3.5/12KHZ,1-4 SEC SWEEP,25/50 MS CESP
Additional Forms of Bathymetric Data: ANALOG RECORDS, MICROFILM
Magnetics Instrumentation: GEOMETRICS PROTON-PRECESSION GRADIOMETER
Additional Forms of Magnetics Data: ANALOG RECORDS
Gravity Instrumentation: LACOSTE-ROMBERG S-53 SEA-GRAVIMETER
Additional Forms of Gravity Data: ANALOG RECORDS
Seismic Instrumentation: 1313 CU.IN AIRGUN-24CHAN/UNIBOOM/3.5KHZ
Formats of Seismic Data: ANALOG PAPER ROLL
Topmost Latitude of Survey: -43
Bottommost Latitude: -78
Leftmost Longitude: +129
Rightmost Longitude: +174
General Digitizing Rate of Bathymetry: 008
General Sampling Rate of Bathymetry: 1-4 SECOND
Bathymetric Datum Code: 00
Interpolation Scheme: NO INTERPOLATION,DATA INTERVAL 1-5 MIN. W/INFLECTIONS
General Digitizing Rate of Magnetics: 009
General Sampling Rate of Magnetics: 03
Magnetic Sensor Tow Distance: 300
Sensor Depth: 500
Horizontal Sensor Separation: 150
Reference Field Code: 04
Reference Field: IGRF-75
Method of Applying Residual Field: LINEAR INTERP. BETWEEN NAV. PTS.
General Digitizing Rate of Gravity: 009
General Sampling Rate of Gravity: 20
Theoretical Gravity Formula Code: 3
Theoretical Gravity Formula: IAG SYSTEM 1967
Reference System Code: 3
Reference System: SYSTEM IGSN 71
Corrections Applied: DRIFT,EOTVOS CORRECTIONS
Departure Base Station Gravity: 9805265
Departure Base Station Description: LYTTLETON, NEW ZEALAND
Arrival Base Station Gravity: 9805265
Arrival Base Station Description: LYTTLETON, NEW ZEALAND
Additional Documentation: BATHYMETRY DATA DIGITIZED MANUALLY BY U.S.G.S. FROM ANALOG RECORDS. MAGNETIC RESIDUAL FIELD DERIVED FROM GRADIOMETER RECONSTRUCTED, MAGNETIC FIELD, NOT FROM SINGL SENSOR. RECONSTRUCTION METHOD, DEVELOPED BY GEOMETRICS, INC. SIDESCAN SONAR, SONOBOUY
Number of Data Records: 46579
Min/Max Data Record:
Date: 1984 01 04
Latitude: -77.10433
Longitude: +129.74580
Bathymetry, 2- Way Traveltime: 001600
Bathymetry, Corrected Depth: 120.0
Magnetics Total Field, 1st Sensor: 576210
Magnetics Total Field, 2nd Sensor: 652413
Magnetics Residual Field: -88995
Observed Gravity: 9805725
Free-Air Anomaly: -1173
Seismic Line Number: 1
Seismic Shot-Point Number: 41
Min/Max Data Record:
Date: 1984 02 01
Latitude: -43.58359
Longitude: +173.18375
Bathymetry, 2- Way Traveltime: 060840
Bathymetry, Corrected Depth: 4530.0
Magnetics Total Field, 1st Sensor: 674390
Magnetics Total Field, 2nd Sensor: 674360
Magnetics Residual Field: +07361
Observed Gravity: 9823868
Free-Air Anomaly: +2366
Seismic Line Number: 13
Seismic Shot-Point Number: 4687