Survey Identifier: MRTN06WT
Format Acronym: MGD77
Data Center File Number: 15040128
Parameters Surveyed Code: 55533
File Creation Date (yyyymmdd): 19
Source Institution: SCRIPPS INSTITUTION OF OCEANOGRAPHY
Country: USA
Platform Name: R/V T.WASHINGTON
Platform Type Code: 1
Platform Type: SHIP
Chief Scientist(s): LONSDALE P.
Project: MARATHON LEG 6
Funding: ONR NOO014-80-C-0440
Survey Departure Date (yyyymmdd): 19840823
Port of Departure: PAGO PAGO,SAMOA
Survey Arrival Date (yyyymmdd): 19840926
Port of Arrival: MAR DEL PLATA,ARGENTINA
Navigation Instrumentation: SATNAV,AUTO LOG GYRO+2D DOPPLER SPD LOG
Geodetic Datum/Position: LINEAR INTERP.BETWEEN ADJACENT FIXES
Bathymetry Instrumentation: SEABEAM VERT.BEAM(2&2/3DEG)&3.5KHZ(WIDE)
Additional Forms of Bathymetric Data: ANAL.REC,35MM FILM,DIGITAL MAG. TAPE
Magnetics Instrumentation: GEOMETRICS MAGNETOMETER MOD G-801/3
Additional Forms of Magnetics Data: ANAL.REC,DIGITAL MAG. TAPE
Gravity Instrumentation: ASKANIA GSS2,ANSCHUTZ ELECT. GYRO TABLE
Additional Forms of Gravity Data: ANAL.REC,DIGITAL MAG.TAPE
Seismic Instrumentation: WATERGUN SOURCE, DIGITAL, 1 CHANNEL
Formats of Seismic Data: ANAL.REC,35MM FILM,DIGITAL MAG.TAPE
Topmost Latitude of Survey: -14
Bottommost Latitude: -60
Leftmost Longitude: -176
Rightmost Longitude: -057
General Digitizing Rate of Bathymetry: 010
General Sampling Rate of Bathymetry: 1PING IN H20
Assumed Sound Velocity: 15000
Bathymetric Datum Code: 00
Interpolation Scheme: 1 MINUTE AVERAGES EXTRACTED FROM SEABEAM VERTICAL BEAMS
General Digitizing Rate of Magnetics: 010
General Sampling Rate of Magnetics: 06
Reference Field Code: 03
Reference Field: IGRF 1980
Method of Applying Residual Field: LIN.INTERP.POINTS WITHIN ONE DEGREE SQUARE
General Digitizing Rate of Gravity: 010
General Sampling Rate of Gravity: 20
Theoretical Gravity Formula Code: 3
Theoretical Gravity Formula: IAG SYSTEM 1967
Reference System Code: 2
Reference System: POTSDAM SYSTEM
Departure Base Station Gravity: 9786418
Departure Base Station Description: FUELPIER PAGO PAGO DOD2050-3
Arrival Base Station Gravity: 9800298
Arrival Base Station Description: BOLLARD17 NAVYBASE DOD0416-3
Additional Documentation: DEPTHS CORRECTED FOR 5 METERS SHIP DRAFT.
Number of Data Records: 49010
Min/Max Data Record:
Date: 1984 08 23
Latitude: -59.40193
Longitude: -175.41644
Bathymetry, 2- Way Traveltime: 002253
Bathymetry, Corrected Depth: 169.0
Magnetics Total Field, 1st Sensor: 250640
Magnetics Residual Field: -17939
Observed Gravity: 9792640
Free-Air Anomaly: -1803
Min/Max Data Record:
Date: 1984 09 26
Latitude: -14.31282
Longitude: -57.83095
Bathymetry, 2- Way Traveltime: 139186
Bathymetry, Corrected Depth: 10804.0
Magnetics Total Field, 1st Sensor: 544180
Magnetics Residual Field: +18462
Observed Gravity: 9814288
Free-Air Anomaly: +5468