Survey Identifier: PLUM07WT
Format Acronym: MGD77
Data Center File Number: 15040194
Parameters Surveyed Code: 55333
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): J.OVERPECK.L.PETERSON
Project: PLUME LEG 7
Funding: NSF
Survey Departure Date (yyyymmdd): 19900605
Port of Departure: LA GUARIA,VENEZULA
Survey Arrival Date (yyyymmdd): 19900626
Port of Arrival: LA GUAIRA, VENEZULA
Navigation Instrumentation: SATNAV/GPS,AUTO LOG GYRO+2D DOPPLER SPD
Geodetic Datum/Position: LINEAR INTERP.BETWEEN ADJACENT FIXES
Bathymetry Instrumentation: SEABEAM VERTICAL BEAM (2&2/3 DEG) & 3.5
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: BELL BGM-3 METER
Additional Forms of Gravity Data: DIGITAL MAG TAPE
Seismic Instrumentation: WATER GUN
Formats of Seismic Data: ANAL. REC,35MM FILM
Topmost Latitude of Survey: +11
Bottommost Latitude: +10
Leftmost Longitude: -067
Rightmost Longitude: -064
General Digitizing Rate of Bathymetry: 010
General Sampling Rate of Bathymetry: 1PING IN H2O
Assumed Sound Velocity: 15000
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-1985
Method of Applying Residual Field: LIN.INTERP.POINTS WITHIN ONE DEGREE SQUARE
General Digitizing Rate of Gravity: 010
General Sampling Rate of Gravity: 01
Theoretical Gravity Formula Code: 3
Theoretical Gravity Formula: IAG SYSTEM 1967
Reference System Code: 3
Reference System: SYSTEM IGSN 71
Corrections Applied: EOTVOS AND METER DRIFT
Departure Base Station Gravity: 9782373
Departure Base Station Description: DOD 0034-8 LA GUAIRA
Arrival Base Station Gravity: 9785814
Arrival Base Station Description: INST. OCEANOGRAPHICO,MANZANILLO
Additional Documentation: PROCESSED BY GEOLOGICAL DATA CENTER, SCRIPPS INSTITUTION OF OCEANOGRAPHY, DEPTHS CORRECTED FOR 5 METER SHIP DRAFT. GRAVITY: 1 SEC METER COUNTS FILTERED WITH 25 POLE FILTER WITH 148 SEC DELAY. FREE AIR ANOMALY SPIKES PRESENT BECAUSE SAME FILTER NOT USED, FOR NAVIGATION. NGDC has multibeam bathymetric data for this cruise, however the tracklines, found here in GEODAS do not exactly correspond to the multibm data available.
Number of Data Records: 28618
Min/Max Data Record:
Date: 1990 06 06
Latitude: +10.38938
Longitude: -66.96512
Bathymetry, 2- Way Traveltime: 000640
Bathymetry, Corrected Depth: 48.0
Magnetics Total Field, 1st Sensor: 352760
Magnetics Residual Field: -02185
Min/Max Data Record:
Date: 1990 06 26
Latitude: +10.98537
Longitude: -64.19250
Bathymetry, 2- Way Traveltime: 018933
Bathymetry, Corrected Depth: 1447.0
Magnetics Total Field, 1st Sensor: 357470
Magnetics Residual Field: +00015