Survey Identifier: MRTN08WT
Format Acronym: MGD77
Data Center File Number: 15040130
Parameters Surveyed Code: 51531
File Creation Date (yyyymmdd): 19860514
Source Institution: SCRIPPS INSTITUTION OF OCEANOGRAPHY
Country: USA
Platform Name: R/V T.WASHINGTON
Platform Type Code: 1
Platform Type: SHIP
Chief Scientist(s): RODEN G.
Project: MARATHON LEG 8
Funding: ONR 0440
Survey Departure Date (yyyymmdd): 19841026
Port of Departure: MONTEVIDEO,URUGUAY
Survey Arrival Date (yyyymmdd): 19841116
Port of Arrival: MONTEVIDEO,URUGUAY
Navigation Instrumentation: SATNAV, AUTO LEG 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: -34
Bottommost Latitude: -43
Leftmost Longitude: -057
Rightmost Longitude: -039
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
Additional Documentation: DEPTHS CORRECTED FOR 5 METER SHIP DRAFT. NGDC has multibeam bathymetry data for this cruise, however the tracklines, found here in GEODAS do not exactly correspond to the multibm data available.
Number of Data Records: 30507
Min/Max Data Record:
Date: 1984 10 26
Latitude: -42.00790
Longitude: -56.20767
Bathymetry, 2- Way Traveltime: 012759
Bathymetry, Corrected Depth: 955.0
Observed Gravity: 9796814
Free-Air Anomaly: -1620
Min/Max Data Record:
Date: 1984 11 16
Latitude: -34.90166
Longitude: -39.45309
Bathymetry, 2- Way Traveltime: 069680
Bathymetry, Corrected Depth: 5233.0
Observed Gravity: 9802467
Free-Air Anomaly: +0379