Survey Identifier: 7TOW08WT
Format Acronym: MGD77
Data Center File Number: 15040036
Parameters Surveyed Code: 35113
File Creation Date (yyyymmdd): 19811009
Source Institution: SCRIPPS INSTITUTION OF OCEANOGRAPHY
Country: USA
Platform Name: R/V THOMAS WASHINGTON
Platform Type Code: 1
Platform Type: SHIP
Chief Scientist(s): SPIESS F.
Project: SEVEN TOW LEG 8
Survey Departure Date (yyyymmdd): 19700726
Port of Departure: ADAK,ALASKA
Survey Arrival Date (yyyymmdd): 19700817
Port of Arrival: ASTORIA,OREGON
Navigation Instrumentation: SATNAV,AUTOLOG GYRO + EMLOG
Geodetic Datum/Position: LINEAR INTERP.BETWEEN ADJACENT FIXES
Bathymetry Instrumentation: 12KHZ/GIFFT RECORDER/WIDE(60DEG)BEAM
Additional Forms of Bathymetric Data: ANALOGUE RECORDS
Magnetics Instrumentation: VARIAN MFD PROTON PRECESSION MOD 4970
Additional Forms of Magnetics Data: ANAL.RECORDS,CARDS
Seismic Instrumentation: 40CU.IN.AIRGUN,10-300HZ,PDR MK 10 REC.
Formats of Seismic Data: ANAL.RECORDS,35MM MICROFILM
Topmost Latitude of Survey: +52
Bottommost Latitude: +46
Leftmost Longitude: -177
Rightmost Longitude: -124
General Digitizing Rate of Bathymetry: 000
General Sampling Rate of Bathymetry: 1SECONDSWEEP
Assumed Sound Velocity: 14630
Bathymetric Datum Code: 00
General Digitizing Rate of Magnetics: 050
General Sampling Rate of Magnetics: 06
Reference Field Code: 03
Reference Field: IGRF 1965
Method of Applying Residual Field: LIN.INTERP.AT 30DEG C/C OR 500MI ALONG TRACK
Number of Data Records: 4512
Min/Max Data Record:
Date: 1970 07 27
Latitude: +46.24590
Longitude: -176.86800
Magnetics Total Field, 1st Sensor: 462900
Magnetics Residual Field: -19700
Min/Max Data Record:
Date: 1970 08 17
Latitude: +51.90580
Longitude: -124.80930
Magnetics Total Field, 1st Sensor: 554200
Magnetics Residual Field: +10300