Survey Identifier: 7TOW3BWT
Format Acronym: MGD77
Data Center File Number: 15040031
Parameters Surveyed Code: 55113
File Creation Date (yyyymmdd): 19810806
Source Institution: SCRIPPS INSTITUTION OF OCEANOGRAPHY
Country: USA
Platform Name: R/V THOMAS WASHINGTON
Platform Type Code: 1
Platform Type: SHIP
Chief Scientist(s): SMITH S.M.,SHARMAN G.
Project: SEVEN TOW LEG 3B
Survey Departure Date (yyyymmdd): 19700407
Port of Departure: HONOLULU,HAWAII
Survey Arrival Date (yyyymmdd): 19700422
Port of Arrival: PAGO PAGO,SAMOA
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,PUNCHED CARDS
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: ANALOGUE RECORDS
Topmost Latitude of Survey: +22
Bottommost Latitude: -15
Leftmost Longitude: -178
Rightmost Longitude: -157
General Digitizing Rate of Bathymetry: 050
General Sampling Rate of Bathymetry: 1SECONDSWEEP
Assumed Sound Velocity: 14630
Bathymetric Datum Code: 00
Interpolation Scheme: 5 MINUTE INTERVAL
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: 4200
Min/Max Data Record:
Date: 1970 04 07
Latitude: -14.25730
Longitude: -177.57980
Bathymetry, 2- Way Traveltime: 000750
Bathymetry, Corrected Depth: 56.0
Magnetics Total Field, 1st Sensor: 333650
Magnetics Residual Field: -06450
Min/Max Data Record:
Date: 1970 04 22
Latitude: +21.26000
Longitude: -157.92160
Bathymetry, 2- Way Traveltime: 083624
Bathymetry, Corrected Depth: 6340.0
Magnetics Total Field, 1st Sensor: 362300
Magnetics Residual Field: +07300