Survey Identifier: MRTN09WT
Format Acronym: MGD77
Data Center File Number: 15040131
Parameters Surveyed Code: 51531
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): MCCARTNEY M.
Project: MARATHON LEG 9
Funding: ONR-0440
Survey Departure Date (yyyymmdd): 19841118
Port of Departure: MONTEVIDEO,URUGUAY
Survey Arrival Date (yyyymmdd): 19841211
Port of Arrival: RIO DE JANEIRO,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: NONE COLLECTED
Additional Forms of Magnetics Data: NONE COLLECTED
Gravity Instrumentation: ASKANIA GSS2,ANSCHUTZ ELECT. GYRO TABLE
Additional Forms of Gravity Data: ANAL.REC,DIGITAL MAG.TAPE
Seismic Instrumentation: NONE COLLECTED
Formats of Seismic Data: NONE COLLECTED
Topmost Latitude of Survey: -22
Bottommost Latitude: -37
Leftmost Longitude: -057
Rightmost Longitude: -036
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 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: 9797451
Departure Base Station Description: MARINA BLDG,DODO377-2
Arrival Base Station Gravity: 9787899
Arrival Base Station Description: NAT.OBS.OF BRAZIL,DODO128-1
Additional Documentation: DEPTHS CORRECTED FOR 5 METER SHIP DRAFT.
Number of Data Records: 32581
Min/Max Data Record:
Date: 1984 11 18
Latitude: -36.08342
Longitude: -56.22450
Bathymetry, 2- Way Traveltime: 002506
Bathymetry, Corrected Depth: 188.0
Observed Gravity: 9789068
Free-Air Anomaly: -4870
Min/Max Data Record:
Date: 1984 12 11
Latitude: -22.96782
Longitude: -36.84653
Bathymetry, 2- Way Traveltime: 065893
Bathymetry, Corrected Depth: 4960.0
Observed Gravity: 9798394
Free-Air Anomaly: +1056