Survey Identifier: MRTN13WT
Format Acronym: MGD77
Data Center File Number: 15040135
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): FOX J.,FORSYTH D.
Project: MARATHON LEG 13
Funding: ONR-0440
Survey Departure Date (yyyymmdd): 19850401
Port of Departure: CAPETOWN, SOUTH AFRICA
Survey Arrival Date (yyyymmdd): 19850501
Port of Arrival: RECIFE,BRAZIL
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,35MM FILM,DIGITAL MAG.TAPE
Gravity Instrumentation: ASKANIA GSS2,ANSCHUTZ ELECT. GYRO TABLE
Additional Forms of Gravity Data: ANAL.REC,35MM FILM,DIGITAL MAG.TAPE
Seismic Instrumentation: WATERGUN SOURCE,DIGITAL, 1 CHANNEL
Formats of Seismic Data: ANALOGUE RECORDS,35MM FILM 09
Topmost Latitude of Survey: -08
Bottommost Latitude: -35
Leftmost Longitude: -035
Rightmost Longitude: +019
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: 9796168
Departure Base Station Description: DUNCAN DOCK BERTH "L",CAPET.,S.AF
Additional Documentation: DEPTHS CORRECTED FOR 5 METER SHIP DRAFT.
Number of Data Records: 42575
Min/Max Data Record:
Date: 1985 04 01
Latitude: -34.49238
Longitude: -34.38066
Bathymetry, 2- Way Traveltime: 013439
Bathymetry, Corrected Depth: 1001.0
Magnetics Total Field, 1st Sensor: 255980
Magnetics Residual Field: -06239
Observed Gravity: 9781492
Free-Air Anomaly: -1831
Min/Max Data Record:
Date: 1985 05 01
Latitude: -8.34616
Longitude: +18.12833
Bathymetry, 2- Way Traveltime: 079653
Bathymetry, Corrected Depth: 6029.0
Magnetics Total Field, 1st Sensor: 279420
Magnetics Residual Field: +06965
Observed Gravity: 9797134
Free-Air Anomaly: +1356